TY  - JOUR
AU  - Anđelković, Ljubica
AU  - Šuljagić, Marija
AU  - Pavlović, Vladimir
AU  - Mirković, Miljana
AU  - Vrbica, Boško
AU  - Novaković, Irena
AU  - Stanković, Dalibor
AU  - Kremenović, Aleksandar
AU  - Uskoković, Vuk
PY  - 2024
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7552
AB  - Metals and metal oxides have subpar antibacterial activities compared to those of small-molecule antibiotics, yet there are hopes that with proper compositional and structural adjustments this gap might be bridged. In this study, titanium dioxide (TiO2) nanoparticles were mechanically activated and combined with particulate silver through simple reduction process elicited by UV irradiation and assisted with the ultrasound. The resulting powders in various combinations (Ag vs. no Ag, activated vs. non-activated) were characterized using a range of experimental techniques and assessed for their antibacterial activities. The preparation procedure presented in this work prevails over the disadvantages of many chemical routes, most critically by avoiding the use of toxic substances. The mechanical activation did not reduce the particle size or crystallinity of TiO2 nor did it consistently alter the bandgap, yet it enabled the doubling of the amount of silver incorporable into the material. Further, while both mechanical activation and the addition of silver in the amount not exceeding 0.5 wt% produced barely detectable structural changes in the material, they both augmented its antibacterial activity. The precursor TiO2 powder produced no inhibition zone against any of the four bacterial species tested, while the mechanical activation of TiO2 led to the formation of distinct inhibition zones against each of the four bacterial species tested. The addition of silver to activated TiO2 further widened the inhibition zones and it also imparted the antibacterial activity to non-activated TiO2. The boost in the antibacterial activity achieved by the short mechanical activation was of a similar magnitude as the boost obtained after the addition of silver. The antibacterial activity was not different for different species when no silver was added to the system. However, with the addition of silver, species selectivity was obtained, as the composites were more effective against the two Gram-negative species (Escherichia coli and Klebsiella pneumoniae) than against the two Gram-positive ones (Staphylococcus aureus and Bacillus subtilis). The antibacterial activity increased with the addition of silver in the broth assay, but it was mediocre compared to that detected in the agar assay, attesting to the poor dispersability of the powders and their best performance when the bacterial cells migrate to the composite surface than vice versa. The findings of this study give hope that with appropriate microstructural or compositional alterations, the antibacterial activity of metal oxide powders and inorganic materials in general can be made comparable to that of small-molecule antibiotics.
PB  - Elsevier
T2  - Colloids and Surfaces A: Physicochemical and Engineering Aspects
T1  - Mechanical activation and silver supplementation as determinants of the antibacterial activity of titanium dioxide nanoparticles
VL  - 691
SP  - 133890
DO  - 10.1016/j.colsurfa.2024.133890
ER  - 

@article{
author = "Anđelković, Ljubica and Šuljagić, Marija and Pavlović, Vladimir and Mirković, Miljana and Vrbica, Boško and Novaković, Irena and Stanković, Dalibor and Kremenović, Aleksandar and Uskoković, Vuk",
year = "2024",
abstract = "Metals and metal oxides have subpar antibacterial activities compared to those of small-molecule antibiotics, yet there are hopes that with proper compositional and structural adjustments this gap might be bridged. In this study, titanium dioxide (TiO2) nanoparticles were mechanically activated and combined with particulate silver through simple reduction process elicited by UV irradiation and assisted with the ultrasound. The resulting powders in various combinations (Ag vs. no Ag, activated vs. non-activated) were characterized using a range of experimental techniques and assessed for their antibacterial activities. The preparation procedure presented in this work prevails over the disadvantages of many chemical routes, most critically by avoiding the use of toxic substances. The mechanical activation did not reduce the particle size or crystallinity of TiO2 nor did it consistently alter the bandgap, yet it enabled the doubling of the amount of silver incorporable into the material. Further, while both mechanical activation and the addition of silver in the amount not exceeding 0.5 wt% produced barely detectable structural changes in the material, they both augmented its antibacterial activity. The precursor TiO2 powder produced no inhibition zone against any of the four bacterial species tested, while the mechanical activation of TiO2 led to the formation of distinct inhibition zones against each of the four bacterial species tested. The addition of silver to activated TiO2 further widened the inhibition zones and it also imparted the antibacterial activity to non-activated TiO2. The boost in the antibacterial activity achieved by the short mechanical activation was of a similar magnitude as the boost obtained after the addition of silver. The antibacterial activity was not different for different species when no silver was added to the system. However, with the addition of silver, species selectivity was obtained, as the composites were more effective against the two Gram-negative species (Escherichia coli and Klebsiella pneumoniae) than against the two Gram-positive ones (Staphylococcus aureus and Bacillus subtilis). The antibacterial activity increased with the addition of silver in the broth assay, but it was mediocre compared to that detected in the agar assay, attesting to the poor dispersability of the powders and their best performance when the bacterial cells migrate to the composite surface than vice versa. The findings of this study give hope that with appropriate microstructural or compositional alterations, the antibacterial activity of metal oxide powders and inorganic materials in general can be made comparable to that of small-molecule antibiotics.",
publisher = "Elsevier",
journal = "Colloids and Surfaces A: Physicochemical and Engineering Aspects",
title = "Mechanical activation and silver supplementation as determinants of the antibacterial activity of titanium dioxide nanoparticles",
volume = "691",
pages = "133890",
doi = "10.1016/j.colsurfa.2024.133890"
}

Anđelković, L., Šuljagić, M., Pavlović, V., Mirković, M., Vrbica, B., Novaković, I., Stanković, D., Kremenović, A.,& Uskoković, V.. (2024). Mechanical activation and silver supplementation as determinants of the antibacterial activity of titanium dioxide nanoparticles. in Colloids and Surfaces A: Physicochemical and Engineering Aspects
Elsevier., 691, 133890.
https://doi.org/10.1016/j.colsurfa.2024.133890

Anđelković L, Šuljagić M, Pavlović V, Mirković M, Vrbica B, Novaković I, Stanković D, Kremenović A, Uskoković V. Mechanical activation and silver supplementation as determinants of the antibacterial activity of titanium dioxide nanoparticles. in Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2024;691:133890.
doi:10.1016/j.colsurfa.2024.133890 .

Anđelković, Ljubica, Šuljagić, Marija, Pavlović, Vladimir, Mirković, Miljana, Vrbica, Boško, Novaković, Irena, Stanković, Dalibor, Kremenović, Aleksandar, Uskoković, Vuk, "Mechanical activation and silver supplementation as determinants of the antibacterial activity of titanium dioxide nanoparticles" in Colloids and Surfaces A: Physicochemical and Engineering Aspects, 691 (2024):133890,
https://doi.org/10.1016/j.colsurfa.2024.133890 . .

TY  - JOUR
AU  - Mutić, Tijana
AU  - Stanković, Dalibor
AU  - Manojlović, Dragan
AU  - Petrić, Djordje
AU  - Pastor, Ferenc
AU  - Avdin, Vyacheslav V.
AU  - Ognjanović, Miloš
AU  - Stanković, Vesna
PY  - 2024
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7422
AB  - In this work, we successfully prepared a modified cobalt oxide (Co3O4) carbon paste electrode to detect Levofloxacin (LEV). By synthesizing Co3O4 nanoparticles through the chemical coprecipitation method, the electrochemical properties of the electrode and LEV were thoroughly investigated using CV, SWV, and EIS, while material properties were scrutinized using ICP-OES, TEM, SEM, and XRD. The results showed that the prepared electrode displayed a better electrocatalytic response than the bare carbon paste electrode. After optimizing SWV, the electrode exhibited a wide linear working range from 1 to 85 μM at pH 5 of BRBS as the supporting electrolyte. The selectivity of the proposed method was satisfactory, with good repeatability and reproducibility, strongly suggesting a potential application for determining LEV in real samples, particularly in pharmaceutical formulations. The practicality of the approach was demonstrated through good recoveries, and the morphology of the materials was found to be closely related to other parameters, indicating that the developed method can provide a cost-effective, rapid, selective, and sensitive means for LEV monitoring. Overall, this project has made significant progress towards developing a reliable method for detecting LEV and has opened up new opportunities for future research in this field.
PB  - MDPI AG
T2  - Electrochem
T1  - Micromolar Levofloxacin Sensor by Incorporating Highly Crystalline Co3O4 into a Carbon Paste Electrode Structure
VL  - 5
IS  - 1
SP  - 45
EP  - 56
DO  - 10.3390/electrochem5010003
ER  - 

@article{
author = "Mutić, Tijana and Stanković, Dalibor and Manojlović, Dragan and Petrić, Djordje and Pastor, Ferenc and Avdin, Vyacheslav V. and Ognjanović, Miloš and Stanković, Vesna",
year = "2024",
abstract = "In this work, we successfully prepared a modified cobalt oxide (Co3O4) carbon paste electrode to detect Levofloxacin (LEV). By synthesizing Co3O4 nanoparticles through the chemical coprecipitation method, the electrochemical properties of the electrode and LEV were thoroughly investigated using CV, SWV, and EIS, while material properties were scrutinized using ICP-OES, TEM, SEM, and XRD. The results showed that the prepared electrode displayed a better electrocatalytic response than the bare carbon paste electrode. After optimizing SWV, the electrode exhibited a wide linear working range from 1 to 85 μM at pH 5 of BRBS as the supporting electrolyte. The selectivity of the proposed method was satisfactory, with good repeatability and reproducibility, strongly suggesting a potential application for determining LEV in real samples, particularly in pharmaceutical formulations. The practicality of the approach was demonstrated through good recoveries, and the morphology of the materials was found to be closely related to other parameters, indicating that the developed method can provide a cost-effective, rapid, selective, and sensitive means for LEV monitoring. Overall, this project has made significant progress towards developing a reliable method for detecting LEV and has opened up new opportunities for future research in this field.",
publisher = "MDPI AG",
journal = "Electrochem",
title = "Micromolar Levofloxacin Sensor by Incorporating Highly Crystalline Co3O4 into a Carbon Paste Electrode Structure",
volume = "5",
number = "1",
pages = "45-56",
doi = "10.3390/electrochem5010003"
}

Mutić, T., Stanković, D., Manojlović, D., Petrić, D., Pastor, F., Avdin, V. V., Ognjanović, M.,& Stanković, V.. (2024). Micromolar Levofloxacin Sensor by Incorporating Highly Crystalline Co3O4 into a Carbon Paste Electrode Structure. in Electrochem
MDPI AG., 5(1), 45-56.
https://doi.org/10.3390/electrochem5010003

Mutić T, Stanković D, Manojlović D, Petrić D, Pastor F, Avdin VV, Ognjanović M, Stanković V. Micromolar Levofloxacin Sensor by Incorporating Highly Crystalline Co3O4 into a Carbon Paste Electrode Structure. in Electrochem. 2024;5(1):45-56.
doi:10.3390/electrochem5010003 .

Mutić, Tijana, Stanković, Dalibor, Manojlović, Dragan, Petrić, Djordje, Pastor, Ferenc, Avdin, Vyacheslav V., Ognjanović, Miloš, Stanković, Vesna, "Micromolar Levofloxacin Sensor by Incorporating Highly Crystalline Co3O4 into a Carbon Paste Electrode Structure" in Electrochem, 5, no. 1 (2024):45-56,
https://doi.org/10.3390/electrochem5010003 . .

TY  - JOUR
AU  - Đurđić, Slađana
AU  - Vlahović, Filip
AU  - Ognjanović, Miloš
AU  - Gemeiner, Pavol
AU  - Sarakhman, Olha
AU  - Stanković, Vesna
AU  - Mutić, Jelena
AU  - Stanković, Dalibor
AU  - Švorc, Lubomír
PY  - 2024
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7424
AB  - In the present work, a nanocomposite, based on embedding Co-doped CeO2 nanoparticles into graphitic carbon nitride (g-C3N4), was applied to functionalize commercial glassy carbon paste. This is the first application of the electrochemical sensor, developed through the proposed procedure, in electrochemical sensing. The sensor was utilized for the electrochemical determination of organophosphate pesticide fenitrothion (FNT). Cyclic voltammetry identified reversible oxidation of FNT (oxidation at 0.18 V and reduction at 0.13 V) and additional reduction at 0.62 V vs. Ag/AgCl in HCl solution (pH =1). Theoretical calculations were carried out to model and elucidate experimentally observed redox processes. Special attention was devoted to modeling experimental conditions, and based on the obtained results, a detailed redox mechanism of the investigated analyte was proposed. This represents the first complete and unambiguous elucidation of the FNT redox mechanism, supported by joined experimental and theoretical data. Square wave voltammetry (SWV) was utilized for quantification, whereby the FNT oxidation peak was chosen for monitoring the analyte concentration. The developed sensor provided a nanomolar detection limit (3.2 nmol L 1), a wide linear concentration range (from 0.01 to 13.7 μmol L 1), and good precision, repeatability, and selectivity towards FNT. Practical application possibility was explored by testing the sensor performance for examining tap water and apple samples. Recovery tests, conducted during the FNT-spiked sample assays, showed a great application capability of the developed sensor for real-time monitoring of FNT traces in environmental samples.
PB  - Elsevier
T2  - Science of The Total Environment
T1  - Nano-size cobalt-doped cerium oxide particles embedded into graphitic carbon nitride for enhanced electrochemical sensing of insecticide fenitrothion in environmental samples: An experimental study with the theoretical elucidation of redox events
VL  - 909
SP  - 168483
DO  - 10.1016/j.scitotenv.2023.168483
ER  - 

@article{
author = "Đurđić, Slađana and Vlahović, Filip and Ognjanović, Miloš and Gemeiner, Pavol and Sarakhman, Olha and Stanković, Vesna and Mutić, Jelena and Stanković, Dalibor and Švorc, Lubomír",
year = "2024",
abstract = "In the present work, a nanocomposite, based on embedding Co-doped CeO2 nanoparticles into graphitic carbon nitride (g-C3N4), was applied to functionalize commercial glassy carbon paste. This is the first application of the electrochemical sensor, developed through the proposed procedure, in electrochemical sensing. The sensor was utilized for the electrochemical determination of organophosphate pesticide fenitrothion (FNT). Cyclic voltammetry identified reversible oxidation of FNT (oxidation at 0.18 V and reduction at 0.13 V) and additional reduction at 0.62 V vs. Ag/AgCl in HCl solution (pH =1). Theoretical calculations were carried out to model and elucidate experimentally observed redox processes. Special attention was devoted to modeling experimental conditions, and based on the obtained results, a detailed redox mechanism of the investigated analyte was proposed. This represents the first complete and unambiguous elucidation of the FNT redox mechanism, supported by joined experimental and theoretical data. Square wave voltammetry (SWV) was utilized for quantification, whereby the FNT oxidation peak was chosen for monitoring the analyte concentration. The developed sensor provided a nanomolar detection limit (3.2 nmol L 1), a wide linear concentration range (from 0.01 to 13.7 μmol L 1), and good precision, repeatability, and selectivity towards FNT. Practical application possibility was explored by testing the sensor performance for examining tap water and apple samples. Recovery tests, conducted during the FNT-spiked sample assays, showed a great application capability of the developed sensor for real-time monitoring of FNT traces in environmental samples.",
publisher = "Elsevier",
journal = "Science of The Total Environment",
title = "Nano-size cobalt-doped cerium oxide particles embedded into graphitic carbon nitride for enhanced electrochemical sensing of insecticide fenitrothion in environmental samples: An experimental study with the theoretical elucidation of redox events",
volume = "909",
pages = "168483",
doi = "10.1016/j.scitotenv.2023.168483"
}

Đurđić, S., Vlahović, F., Ognjanović, M., Gemeiner, P., Sarakhman, O., Stanković, V., Mutić, J., Stanković, D.,& Švorc, L.. (2024). Nano-size cobalt-doped cerium oxide particles embedded into graphitic carbon nitride for enhanced electrochemical sensing of insecticide fenitrothion in environmental samples: An experimental study with the theoretical elucidation of redox events. in Science of The Total Environment
Elsevier., 909, 168483.
https://doi.org/10.1016/j.scitotenv.2023.168483

Đurđić S, Vlahović F, Ognjanović M, Gemeiner P, Sarakhman O, Stanković V, Mutić J, Stanković D, Švorc L. Nano-size cobalt-doped cerium oxide particles embedded into graphitic carbon nitride for enhanced electrochemical sensing of insecticide fenitrothion in environmental samples: An experimental study with the theoretical elucidation of redox events. in Science of The Total Environment. 2024;909:168483.
doi:10.1016/j.scitotenv.2023.168483 .

Đurđić, Slađana, Vlahović, Filip, Ognjanović, Miloš, Gemeiner, Pavol, Sarakhman, Olha, Stanković, Vesna, Mutić, Jelena, Stanković, Dalibor, Švorc, Lubomír, "Nano-size cobalt-doped cerium oxide particles embedded into graphitic carbon nitride for enhanced electrochemical sensing of insecticide fenitrothion in environmental samples: An experimental study with the theoretical elucidation of redox events" in Science of The Total Environment, 909 (2024):168483,
https://doi.org/10.1016/j.scitotenv.2023.168483 . .

TY  - JOUR
AU  - Khalife, Majd
AU  - Stanković, Dalibor
AU  - Stanković, Vesna
AU  - Danicka, Julia
AU  - Rizzotto, Francesco
AU  - Costache, Vlad
AU  - Schwok, Anny Slama
AU  - Gaudu, Philippe
AU  - Vidić, Jasmina
PY  - 2024
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6896
AB  - Vitamin K refers to a group of vitamins that play an important role in blood coagulation and regulation of bone and vascular metabolism. However, vitamin K3 may give severe side effects in animal and humans when improperly added to food and feed due to its toxicity. Here, an electrochemical biosensor, based on the YaiB NADPH-dependent quinone reductase from Lactococcus lactis (YaiB), was developed to achieve rapid and redox probe-free detection of vitamin K3. First, the ability of the carbon electrode to distinguish between 1,4-benzoquinone and hydroquinone was demonstrated. Then, we engineered YaiB to work as a bioreceptor immobilized at the electrode and its sensitivity and specificity to reduce vitamin K3 were demonstrated. Finally, to demonstrate the practical potential of the biosensor, we tested it directly in spiked milk samples, achieving 15-minute quantification of the vitamin K3. The limit of detection was 0.87 µM and 4.1 µM in buffer and milk, respectively.
PB  - Elsevier
T2  - Food Chemistry
T1  - Electrochemical biosensor based on NAD(P)H-dependent quinone reductase for rapid and efficient detection of vitamin K3
VL  - 433
SP  - 137316
DO  - 10.1016/j.foodchem.2023.137316
ER  - 

@article{
author = "Khalife, Majd and Stanković, Dalibor and Stanković, Vesna and Danicka, Julia and Rizzotto, Francesco and Costache, Vlad and Schwok, Anny Slama and Gaudu, Philippe and Vidić, Jasmina",
year = "2024",
abstract = "Vitamin K refers to a group of vitamins that play an important role in blood coagulation and regulation of bone and vascular metabolism. However, vitamin K3 may give severe side effects in animal and humans when improperly added to food and feed due to its toxicity. Here, an electrochemical biosensor, based on the YaiB NADPH-dependent quinone reductase from Lactococcus lactis (YaiB), was developed to achieve rapid and redox probe-free detection of vitamin K3. First, the ability of the carbon electrode to distinguish between 1,4-benzoquinone and hydroquinone was demonstrated. Then, we engineered YaiB to work as a bioreceptor immobilized at the electrode and its sensitivity and specificity to reduce vitamin K3 were demonstrated. Finally, to demonstrate the practical potential of the biosensor, we tested it directly in spiked milk samples, achieving 15-minute quantification of the vitamin K3. The limit of detection was 0.87 µM and 4.1 µM in buffer and milk, respectively.",
publisher = "Elsevier",
journal = "Food Chemistry",
title = "Electrochemical biosensor based on NAD(P)H-dependent quinone reductase for rapid and efficient detection of vitamin K3",
volume = "433",
pages = "137316",
doi = "10.1016/j.foodchem.2023.137316"
}

Khalife, M., Stanković, D., Stanković, V., Danicka, J., Rizzotto, F., Costache, V., Schwok, A. S., Gaudu, P.,& Vidić, J.. (2024). Electrochemical biosensor based on NAD(P)H-dependent quinone reductase for rapid and efficient detection of vitamin K3. in Food Chemistry
Elsevier., 433, 137316.
https://doi.org/10.1016/j.foodchem.2023.137316

Khalife M, Stanković D, Stanković V, Danicka J, Rizzotto F, Costache V, Schwok AS, Gaudu P, Vidić J. Electrochemical biosensor based on NAD(P)H-dependent quinone reductase for rapid and efficient detection of vitamin K3. in Food Chemistry. 2024;433:137316.
doi:10.1016/j.foodchem.2023.137316 .

Khalife, Majd, Stanković, Dalibor, Stanković, Vesna, Danicka, Julia, Rizzotto, Francesco, Costache, Vlad, Schwok, Anny Slama, Gaudu, Philippe, Vidić, Jasmina, "Electrochemical biosensor based on NAD(P)H-dependent quinone reductase for rapid and efficient detection of vitamin K3" in Food Chemistry, 433 (2024):137316,
https://doi.org/10.1016/j.foodchem.2023.137316 . .

TY  - JOUR
AU  - Vlahović, Filip
AU  - Ognjanović, Miloš
AU  - Đurđić, Slađana
AU  - Kukuzar, Andrej
AU  - Antić, Bratislav
AU  - Dojčinović, Biljana
AU  - Stanković, Dalibor
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6361
AB  - We have set-up an electrochemical advanced oxidation process for ethidium bromide (1), based on the Eu-doped MnWO4 (Eu:MnWO4), obtained through a template-driven synthesis, along with developing a suitable monitoring method. Under galvanostatic conditions, Eu:MnWO4-coated graphite electrode serves as anode, applicable for removal of 1. To go further and augment the catalytic method, we have applied a modified carbon paste electrode for the monitoring of 1 with the limit of detection (LOD) of 54 nM. Enhancement of the hydrogen evolution reaction is an indication of electrocatalytic properties of the material, whereby developed method emerges as a candidate for straightforward application in electrochemical advanced oxidation processes (EAOPs). We have enriched experimental data with theoretical insights, provided by Density Functional Theory (DFT), and proposed oxidation mechanism of 1. Based on obtained results, we propose the new nanomaterial as a potent electrochemical modifier, suitable for catalytic treatment and process monitoring of the 1-polluted waters.
PB  - Elsevier
T2  - Applied Catalysis B: Environmental
T1  - Design of an ethidium bromide control circuit supported by deep theoretical insight
VL  - 334
IS  - 122819
DO  - 10.1016/j.apcatb.2023.122819
ER  - 

@article{
author = "Vlahović, Filip and Ognjanović, Miloš and Đurđić, Slađana and Kukuzar, Andrej and Antić, Bratislav and Dojčinović, Biljana and Stanković, Dalibor",
year = "2023",
abstract = "We have set-up an electrochemical advanced oxidation process for ethidium bromide (1), based on the Eu-doped MnWO4 (Eu:MnWO4), obtained through a template-driven synthesis, along with developing a suitable monitoring method. Under galvanostatic conditions, Eu:MnWO4-coated graphite electrode serves as anode, applicable for removal of 1. To go further and augment the catalytic method, we have applied a modified carbon paste electrode for the monitoring of 1 with the limit of detection (LOD) of 54 nM. Enhancement of the hydrogen evolution reaction is an indication of electrocatalytic properties of the material, whereby developed method emerges as a candidate for straightforward application in electrochemical advanced oxidation processes (EAOPs). We have enriched experimental data with theoretical insights, provided by Density Functional Theory (DFT), and proposed oxidation mechanism of 1. Based on obtained results, we propose the new nanomaterial as a potent electrochemical modifier, suitable for catalytic treatment and process monitoring of the 1-polluted waters.",
publisher = "Elsevier",
journal = "Applied Catalysis B: Environmental",
title = "Design of an ethidium bromide control circuit supported by deep theoretical insight",
volume = "334",
number = "122819",
doi = "10.1016/j.apcatb.2023.122819"
}

Vlahović, F., Ognjanović, M., Đurđić, S., Kukuzar, A., Antić, B., Dojčinović, B.,& Stanković, D.. (2023). Design of an ethidium bromide control circuit supported by deep theoretical insight. in Applied Catalysis B: Environmental
Elsevier., 334(122819).
https://doi.org/10.1016/j.apcatb.2023.122819

Vlahović F, Ognjanović M, Đurđić S, Kukuzar A, Antić B, Dojčinović B, Stanković D. Design of an ethidium bromide control circuit supported by deep theoretical insight. in Applied Catalysis B: Environmental. 2023;334(122819).
doi:10.1016/j.apcatb.2023.122819 .

Vlahović, Filip, Ognjanović, Miloš, Đurđić, Slađana, Kukuzar, Andrej, Antić, Bratislav, Dojčinović, Biljana, Stanković, Dalibor, "Design of an ethidium bromide control circuit supported by deep theoretical insight" in Applied Catalysis B: Environmental, 334, no. 122819 (2023),
https://doi.org/10.1016/j.apcatb.2023.122819 . .

TY  - JOUR
AU  - Ognjanović, Miloš
AU  - Jaćimović, Željko
AU  - Kosović-Perutović, Milica
AU  - Besu Žižak, Irina
AU  - Stanojković, Tatjana
AU  - Žižak, Željko
AU  - Dojčinović, Biljana
AU  - Stanković, Dalibor M.
AU  - Antić, Bratislav
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6420
AB  - Partial cation substitution can significantly change the physical properties of parent compounds. By controlling the chemical composition and knowing the mutual relationship between composition and physical properties, it is possible to tailor the properties of materials to those that are superior for desired technological application. Using the polyol synthesis procedure, a series of yttrium-substituted iron oxide nanoconstructs, γ-Fe2−xYxO3 (YIONs), was prepared. It was found that Y3+ could substitute Fe3+ in the crystal structures of maghemite (γ-Fe2O3) up to a limited concentration of ~1.5% (γ-Fe1.969Y0.031O3). Analysis of TEM micrographs showed that crystallites or particles were aggregated in flower-like structures with diameters from 53.7 ± 6.2 nm to 97.3 ± 37.0 nm, depending on yttrium concentration. To be investigated for potential applications as magnetic hyperthermia agents, YIONs were tested twice: their heating efficiency was tested and their toxicity was investigated. The Specific Absorption Rate (SAR) values were in the range of 32.6 W/g to 513 W/g and significantly decreased with increased yttrium concentration in the samples. Intrinsic loss power (ILP) for γ-Fe2O3 and γ-Fe1.995Y0.005O3 were ~8–9 nH·m2/Kg, which pointed to their excellent heating efficiency. IC50 values of investigated samples against cancer (HeLa) and normal (MRC-5) cells decreased with increased yttrium concentration and were higher than ~300 μg/mL. The samples of γ-Fe2−xYxO3 did not show a genotoxic effect. The results of toxicity studies show that YIONs are suitable for further in vitro/in vivo studies toward to their potential medical applications, while results of heat generation point to their potential use in magnetic hyperthermia cancer treatment or use as self-heating systems for other technological applications such as catalysis.
T2  - Nanomaterials
T1  - Self-Heating Flower-like Nanoconstructs with Limited Incorporation of Yttrium in Maghemite: Effect of Chemical Composition on Heating Efficiency, Cytotoxicity and Genotoxicity
VL  - 13
IS  - 5
SP  - 870
DO  - 10.3390/nano13050870
ER  - 

@article{
author = "Ognjanović, Miloš and Jaćimović, Željko and Kosović-Perutović, Milica and Besu Žižak, Irina and Stanojković, Tatjana and Žižak, Željko and Dojčinović, Biljana and Stanković, Dalibor M. and Antić, Bratislav",
year = "2023",
abstract = "Partial cation substitution can significantly change the physical properties of parent compounds. By controlling the chemical composition and knowing the mutual relationship between composition and physical properties, it is possible to tailor the properties of materials to those that are superior for desired technological application. Using the polyol synthesis procedure, a series of yttrium-substituted iron oxide nanoconstructs, γ-Fe2−xYxO3 (YIONs), was prepared. It was found that Y3+ could substitute Fe3+ in the crystal structures of maghemite (γ-Fe2O3) up to a limited concentration of ~1.5% (γ-Fe1.969Y0.031O3). Analysis of TEM micrographs showed that crystallites or particles were aggregated in flower-like structures with diameters from 53.7 ± 6.2 nm to 97.3 ± 37.0 nm, depending on yttrium concentration. To be investigated for potential applications as magnetic hyperthermia agents, YIONs were tested twice: their heating efficiency was tested and their toxicity was investigated. The Specific Absorption Rate (SAR) values were in the range of 32.6 W/g to 513 W/g and significantly decreased with increased yttrium concentration in the samples. Intrinsic loss power (ILP) for γ-Fe2O3 and γ-Fe1.995Y0.005O3 were ~8–9 nH·m2/Kg, which pointed to their excellent heating efficiency. IC50 values of investigated samples against cancer (HeLa) and normal (MRC-5) cells decreased with increased yttrium concentration and were higher than ~300 μg/mL. The samples of γ-Fe2−xYxO3 did not show a genotoxic effect. The results of toxicity studies show that YIONs are suitable for further in vitro/in vivo studies toward to their potential medical applications, while results of heat generation point to their potential use in magnetic hyperthermia cancer treatment or use as self-heating systems for other technological applications such as catalysis.",
journal = "Nanomaterials",
title = "Self-Heating Flower-like Nanoconstructs with Limited Incorporation of Yttrium in Maghemite: Effect of Chemical Composition on Heating Efficiency, Cytotoxicity and Genotoxicity",
volume = "13",
number = "5",
pages = "870",
doi = "10.3390/nano13050870"
}

Ognjanović, M., Jaćimović, Ž., Kosović-Perutović, M., Besu Žižak, I., Stanojković, T., Žižak, Ž., Dojčinović, B., Stanković, D. M.,& Antić, B.. (2023). Self-Heating Flower-like Nanoconstructs with Limited Incorporation of Yttrium in Maghemite: Effect of Chemical Composition on Heating Efficiency, Cytotoxicity and Genotoxicity. in Nanomaterials, 13(5), 870.
https://doi.org/10.3390/nano13050870

Ognjanović M, Jaćimović Ž, Kosović-Perutović M, Besu Žižak I, Stanojković T, Žižak Ž, Dojčinović B, Stanković DM, Antić B. Self-Heating Flower-like Nanoconstructs with Limited Incorporation of Yttrium in Maghemite: Effect of Chemical Composition on Heating Efficiency, Cytotoxicity and Genotoxicity. in Nanomaterials. 2023;13(5):870.
doi:10.3390/nano13050870 .

Ognjanović, Miloš, Jaćimović, Željko, Kosović-Perutović, Milica, Besu Žižak, Irina, Stanojković, Tatjana, Žižak, Željko, Dojčinović, Biljana, Stanković, Dalibor M., Antić, Bratislav, "Self-Heating Flower-like Nanoconstructs with Limited Incorporation of Yttrium in Maghemite: Effect of Chemical Composition on Heating Efficiency, Cytotoxicity and Genotoxicity" in Nanomaterials, 13, no. 5 (2023):870,
https://doi.org/10.3390/nano13050870 . .

TY  - CONF
AU  - Ognjanović, Miloš
AU  - Dojčinović, Biljana
AU  - Stanković, Dalibor
AU  - Mirković, Marija
AU  - Vranješ-Đurić, Sanja
AU  - Antić, Bratislav
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7042
AB  - Nanomaterials are intensively researched both from the fundamental aspect due to new properties at the nanoscale, as well as the aspect of their application in many areas of technology. Magnetic nanoparticles (MNPs) are being tested for use in the diagnosis and therapy of diseases. A new field of medicine, Magnetic nanomedicine is primarily based on the application of MNPs as drug carriers, diagnostic agents in Magnetic Resonance Imaging (MRI) and heat generators in magnetic hyperthermia. Among nanoparticles, magnetic nanoplatforms based on iron oxides for cancer diagnosis and therapy (Cancer nanomedicine) are the most researched and clinically tested. This study presents the results of research into the physicochemical properties of iron oxide nanoparticles prepared by the polyol route, as well as their testing for potential applications as agents in magnetic hyperthermia (MH) and radionuclide carriers (vectors) for the diagnosis and therapy of malignant diseases. Multicore iron oxide structures synthesized by the "polyol" method represent clusters of single-core nanoparticles or crystallites. The dimensions of the single core particles are \textasciitilde13.5 nm, while the nanoflowers formed by clustering are \textasciitilde25 nm, depending on the applied synthesis parameters. For targeted medical applications, nanoflowers are coated with different ligands in order to increase colloidal stability and biocompatibility. The best results were by coating MNPs with polyacrylic acid (PAA). The multifunctionality of nanoflowers was investigated by measuring their hyperthermic efficiency for applications in magnetic hyperthermia and radiolabeling with diagnostic (99mTc) and therapeutic radionuclides (177Lu, 90Y). In addition to traditional methods of cancer therapy (surgery, radiotherapy, and chemotherapy), new ways of therapy such as MH are constantly being developed. MH is a therapy based on the property of MNPs that when placed in an alternating (AC) magnetic field, transform the electromagnetic energy of the field into heat. When located inside a tumor, MNPs can locally generate a temperature of 42-46 °C and destroy cancer cells by heat. The hyperthermic efficiency of MNPs is expressed through the Intrinsic Loss Power (ILP) parameter. The measured ILP was 7.3 nHm2/kg which is considered one of the higher reported values found in the literature for iron oxides. Nanoflowers were radiolabeled with 99mTc, 177Lu, and 90Y radionuclides. The in vitro stability of radiolabeling was investigated. Good in vitro stability indicates that the formed radioactive particles can be used simultaneously for bi-modal cancer therapy (MH and radionuclide therapy) or for MH therapy and diagnostics (theranostics), in the case of labeling with 99mTc.
PB  - Association of Metallurgical Engineers of Serbia (AMES)
C3  - MME SEE : 5th Metallurgical and Materials Engineering Congress of South-East Europe : book of abstracts; June 7-10, Trebinje, Bosnia and Herzegovina
T1  - Multicore flower-like magnetite for potential application in cancer nanomedicine
SP  - 21
EP  - 21
UR  - https://hdl.handle.net/21.15107/rcub_cer_7042
ER  - 

@conference{
author = "Ognjanović, Miloš and Dojčinović, Biljana and Stanković, Dalibor and Mirković, Marija and Vranješ-Đurić, Sanja and Antić, Bratislav",
year = "2023",
abstract = "Nanomaterials are intensively researched both from the fundamental aspect due to new properties at the nanoscale, as well as the aspect of their application in many areas of technology. Magnetic nanoparticles (MNPs) are being tested for use in the diagnosis and therapy of diseases. A new field of medicine, Magnetic nanomedicine is primarily based on the application of MNPs as drug carriers, diagnostic agents in Magnetic Resonance Imaging (MRI) and heat generators in magnetic hyperthermia. Among nanoparticles, magnetic nanoplatforms based on iron oxides for cancer diagnosis and therapy (Cancer nanomedicine) are the most researched and clinically tested. This study presents the results of research into the physicochemical properties of iron oxide nanoparticles prepared by the polyol route, as well as their testing for potential applications as agents in magnetic hyperthermia (MH) and radionuclide carriers (vectors) for the diagnosis and therapy of malignant diseases. Multicore iron oxide structures synthesized by the "polyol" method represent clusters of single-core nanoparticles or crystallites. The dimensions of the single core particles are \textasciitilde13.5 nm, while the nanoflowers formed by clustering are \textasciitilde25 nm, depending on the applied synthesis parameters. For targeted medical applications, nanoflowers are coated with different ligands in order to increase colloidal stability and biocompatibility. The best results were by coating MNPs with polyacrylic acid (PAA). The multifunctionality of nanoflowers was investigated by measuring their hyperthermic efficiency for applications in magnetic hyperthermia and radiolabeling with diagnostic (99mTc) and therapeutic radionuclides (177Lu, 90Y). In addition to traditional methods of cancer therapy (surgery, radiotherapy, and chemotherapy), new ways of therapy such as MH are constantly being developed. MH is a therapy based on the property of MNPs that when placed in an alternating (AC) magnetic field, transform the electromagnetic energy of the field into heat. When located inside a tumor, MNPs can locally generate a temperature of 42-46 °C and destroy cancer cells by heat. The hyperthermic efficiency of MNPs is expressed through the Intrinsic Loss Power (ILP) parameter. The measured ILP was 7.3 nHm2/kg which is considered one of the higher reported values found in the literature for iron oxides. Nanoflowers were radiolabeled with 99mTc, 177Lu, and 90Y radionuclides. The in vitro stability of radiolabeling was investigated. Good in vitro stability indicates that the formed radioactive particles can be used simultaneously for bi-modal cancer therapy (MH and radionuclide therapy) or for MH therapy and diagnostics (theranostics), in the case of labeling with 99mTc.",
publisher = "Association of Metallurgical Engineers of Serbia (AMES)",
journal = "MME SEE : 5th Metallurgical and Materials Engineering Congress of South-East Europe : book of abstracts; June 7-10, Trebinje, Bosnia and Herzegovina",
title = "Multicore flower-like magnetite for potential application in cancer nanomedicine",
pages = "21-21",
url = "https://hdl.handle.net/21.15107/rcub_cer_7042"
}

Ognjanović, M., Dojčinović, B., Stanković, D., Mirković, M., Vranješ-Đurić, S.,& Antić, B.. (2023). Multicore flower-like magnetite for potential application in cancer nanomedicine. in MME SEE : 5th Metallurgical and Materials Engineering Congress of South-East Europe : book of abstracts; June 7-10, Trebinje, Bosnia and Herzegovina
Association of Metallurgical Engineers of Serbia (AMES)., 21-21.
https://hdl.handle.net/21.15107/rcub_cer_7042

Ognjanović M, Dojčinović B, Stanković D, Mirković M, Vranješ-Đurić S, Antić B. Multicore flower-like magnetite for potential application in cancer nanomedicine. in MME SEE : 5th Metallurgical and Materials Engineering Congress of South-East Europe : book of abstracts; June 7-10, Trebinje, Bosnia and Herzegovina. 2023;:21-21.
https://hdl.handle.net/21.15107/rcub_cer_7042 .

Ognjanović, Miloš, Dojčinović, Biljana, Stanković, Dalibor, Mirković, Marija, Vranješ-Đurić, Sanja, Antić, Bratislav, "Multicore flower-like magnetite for potential application in cancer nanomedicine" in MME SEE : 5th Metallurgical and Materials Engineering Congress of South-East Europe : book of abstracts; June 7-10, Trebinje, Bosnia and Herzegovina (2023):21-21,
https://hdl.handle.net/21.15107/rcub_cer_7042 .

TY  - CONF
AU  - Ognjanović, Miloš
AU  - Dojčinović, Biljana
AU  - Antić, Bratislav
AU  - Stanković, Dalibor
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7044
AB  - Nanostructured metal oxides used as modifiers of various carbon-based working electrodes serve as the basis for designing sensitive electrochemical sensors to detect desired analytes. The sensors we develop are distinguished by low detection limit (LOD), high analyte selectivity, sensitivity, and versatile real-world sample use case. In this work we present the design of two based on metal oxides as modifiers of carbon paste working electrode (CPE) and their applications in the electrochemical determination of levodopa and adrenaline. The physicochemical properties of designed materials were analyzed by complementary experimental technics (XRPD, TEM, SEM, EDS, electrochemical measurements) to determine their (micro)structural properties and correlate them with electroanalytical performance. Europium has been considered a significant lanthanide element with higher redox reaction behavior. We conducted a hydrothermal synthesis of Eu2O3@Cr2O3 and used them for CPE modification. The proposed Eu2O3@Cr2O3/CPE electrode was used to develop an analytical procedure quantifying L-Dopa in a wide micromolar linear range (1-100 µM), high sensitivity of 1.38 µA µM−1 cm−2 and a low detection limit (LOD = 0.72 µM). On the other side, we investigated the physicochemical properties of the gallium/bismuth mixed oxides and studied the influence of different Ga2O3:Bi2O3 ratios on the electrochemical detection of adrenaline. Square wave voltammetry was optimized, and the best electrode showed a wide linear working range of 7-100 μM, under optimized conditions. The LOD for the proposed sensor was calculated to be 1.9 μM, with a low limit of quantification (LOQ = 5.8 μM). The total performance of the sensors, particularly their performance on real-world samples and their potential for commercialization, had to be carefully evaluated during the sensor construction. Our team is devoted to developing highly selective electrochemical sensors based on nanomaterials to be potentially used as the basis for the fabrication of high-performance miniature devices with exceptional sensitivity to specific analytes, like adrenaline and L-Dopa, in this research.
PB  - Association of Metallurgical Engineers of Serbia (AMES)
C3  - MME SEE : 5th Metallurgical and Materials Engineering Congress of South-East Europe : book of abstracts; June 7-10, Trebinje, Bosnia and Herzegovina
T1  - Nanoscale metal oxides as materials used for modification of carbon-based electrodes in electrochemical sensors
SP  - 76
EP  - 76
UR  - https://hdl.handle.net/21.15107/rcub_cer_7044
ER  - 

@conference{
author = "Ognjanović, Miloš and Dojčinović, Biljana and Antić, Bratislav and Stanković, Dalibor",
year = "2023",
abstract = "Nanostructured metal oxides used as modifiers of various carbon-based working electrodes serve as the basis for designing sensitive electrochemical sensors to detect desired analytes. The sensors we develop are distinguished by low detection limit (LOD), high analyte selectivity, sensitivity, and versatile real-world sample use case. In this work we present the design of two based on metal oxides as modifiers of carbon paste working electrode (CPE) and their applications in the electrochemical determination of levodopa and adrenaline. The physicochemical properties of designed materials were analyzed by complementary experimental technics (XRPD, TEM, SEM, EDS, electrochemical measurements) to determine their (micro)structural properties and correlate them with electroanalytical performance. Europium has been considered a significant lanthanide element with higher redox reaction behavior. We conducted a hydrothermal synthesis of Eu2O3@Cr2O3 and used them for CPE modification. The proposed Eu2O3@Cr2O3/CPE electrode was used to develop an analytical procedure quantifying L-Dopa in a wide micromolar linear range (1-100 µM), high sensitivity of 1.38 µA µM−1 cm−2 and a low detection limit (LOD = 0.72 µM). On the other side, we investigated the physicochemical properties of the gallium/bismuth mixed oxides and studied the influence of different Ga2O3:Bi2O3 ratios on the electrochemical detection of adrenaline. Square wave voltammetry was optimized, and the best electrode showed a wide linear working range of 7-100 μM, under optimized conditions. The LOD for the proposed sensor was calculated to be 1.9 μM, with a low limit of quantification (LOQ = 5.8 μM). The total performance of the sensors, particularly their performance on real-world samples and their potential for commercialization, had to be carefully evaluated during the sensor construction. Our team is devoted to developing highly selective electrochemical sensors based on nanomaterials to be potentially used as the basis for the fabrication of high-performance miniature devices with exceptional sensitivity to specific analytes, like adrenaline and L-Dopa, in this research.",
publisher = "Association of Metallurgical Engineers of Serbia (AMES)",
journal = "MME SEE : 5th Metallurgical and Materials Engineering Congress of South-East Europe : book of abstracts; June 7-10, Trebinje, Bosnia and Herzegovina",
title = "Nanoscale metal oxides as materials used for modification of carbon-based electrodes in electrochemical sensors",
pages = "76-76",
url = "https://hdl.handle.net/21.15107/rcub_cer_7044"
}

Ognjanović, M., Dojčinović, B., Antić, B.,& Stanković, D.. (2023). Nanoscale metal oxides as materials used for modification of carbon-based electrodes in electrochemical sensors. in MME SEE : 5th Metallurgical and Materials Engineering Congress of South-East Europe : book of abstracts; June 7-10, Trebinje, Bosnia and Herzegovina
Association of Metallurgical Engineers of Serbia (AMES)., 76-76.
https://hdl.handle.net/21.15107/rcub_cer_7044

Ognjanović M, Dojčinović B, Antić B, Stanković D. Nanoscale metal oxides as materials used for modification of carbon-based electrodes in electrochemical sensors. in MME SEE : 5th Metallurgical and Materials Engineering Congress of South-East Europe : book of abstracts; June 7-10, Trebinje, Bosnia and Herzegovina. 2023;:76-76.
https://hdl.handle.net/21.15107/rcub_cer_7044 .

Ognjanović, Miloš, Dojčinović, Biljana, Antić, Bratislav, Stanković, Dalibor, "Nanoscale metal oxides as materials used for modification of carbon-based electrodes in electrochemical sensors" in MME SEE : 5th Metallurgical and Materials Engineering Congress of South-East Europe : book of abstracts; June 7-10, Trebinje, Bosnia and Herzegovina (2023):76-76,
https://hdl.handle.net/21.15107/rcub_cer_7044 .

TY  - CONF
AU  - Ognjanović, Miloš
AU  - Radović, Magdalena
AU  - Mirković, Marija
AU  - Vranješ-Đurić, Sanja
AU  - Dojčinović, Biljana
AU  - Stanković, Dalibor
AU  - Antić, Bratislav
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7342
AB  - In the last decades, self-heating magnetic nanoparticles (MNPs) were engineered and investigated for magnetic hyperthermia (MH) and other applications such as catalysis and chemical synthesis. To be applied as nanoheaters for in vivo MH in cancer therapy, MNPs should have high heating efficiency expressed by Intrinsic Loss Power (ILP). One of the requirements for in vivo applications of MNPs is their non-toxicity. Hence, the most investigated MNPs for MH are based on iron oxides (magnetite and maghemite), which are non-toxic or slightly toxic. This work aimed to apply thepolyol-mediated protocol to engineer mixed Zn1-xMnxFe2O4 and analyze their heating abilities. To obtain a series of Zn1-xMnxFe2O4 samples with a specific nominal composition, the initial components, salts of Zn, Mn and Fe, were mixed in the appropriate stoichiometric ratio. The deviation from the target stoichiometry and the formation of samples with polyvalent ions and possibly vacancies were determined after ICP analysis. By analyzing TEM micrographs, we found that the change in the chemical composition does not affect the morphology. Multicore flower-like nanostructures with a size in the range of 47-63 nm were obtained. They consist of many cores (crystallites or nanoparticles) with a size of \textasciitilde10 nm. The samples show good colloidal stability, which is significant for their medical applications. Magnetization measurements in different DC fields showed that the samples are superparamagnetic at 300K and that the saturation magnetization values are in the range of \textasciitilde59-73 emu/g. The hyperthermic efficiency of the synthesized samples was tested in an external ac field of 252 kHz and a field strength of 15.9 kA/m. Significantly different values were obtained for the ILP parameter (in units nHm2/Kg): 5.77 (Zn0.098Mn0.447Fe2.455O4) ˃ 3.22 (Mn0.624Fe2.376O4) ˃ 2.04 (Zn0.182Mn0.344Fe2.474O4) ˃ 1.36 (Zn0.309Mn0.240Fe2.451O4) ˃ 1.01 (Zn0.394Mn0.138Fe2.468O4) ˃ 0.34 (Zn0.640Fe2.360O4). To explain the values of the ILP parameter, additional research is required, which includes the analysis of the influence of local defects and cation distribution on the magnetism of the investigated nanostructures. Also, significantly high ILP values indicate that some samples can be selected and further tested for in vitro/in vivo applications.
PB  - Society of Chemists and Technologists of Macedonia
C3  - 26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia
T1  - Engineering multi-core flower-like magnetic nanoparticles with high intrinsic loss power
SP  - 185
EP  - 185
UR  - https://hdl.handle.net/21.15107/rcub_cer_7342
ER  - 

@conference{
author = "Ognjanović, Miloš and Radović, Magdalena and Mirković, Marija and Vranješ-Đurić, Sanja and Dojčinović, Biljana and Stanković, Dalibor and Antić, Bratislav",
year = "2023",
abstract = "In the last decades, self-heating magnetic nanoparticles (MNPs) were engineered and investigated for magnetic hyperthermia (MH) and other applications such as catalysis and chemical synthesis. To be applied as nanoheaters for in vivo MH in cancer therapy, MNPs should have high heating efficiency expressed by Intrinsic Loss Power (ILP). One of the requirements for in vivo applications of MNPs is their non-toxicity. Hence, the most investigated MNPs for MH are based on iron oxides (magnetite and maghemite), which are non-toxic or slightly toxic. This work aimed to apply thepolyol-mediated protocol to engineer mixed Zn1-xMnxFe2O4 and analyze their heating abilities. To obtain a series of Zn1-xMnxFe2O4 samples with a specific nominal composition, the initial components, salts of Zn, Mn and Fe, were mixed in the appropriate stoichiometric ratio. The deviation from the target stoichiometry and the formation of samples with polyvalent ions and possibly vacancies were determined after ICP analysis. By analyzing TEM micrographs, we found that the change in the chemical composition does not affect the morphology. Multicore flower-like nanostructures with a size in the range of 47-63 nm were obtained. They consist of many cores (crystallites or nanoparticles) with a size of \textasciitilde10 nm. The samples show good colloidal stability, which is significant for their medical applications. Magnetization measurements in different DC fields showed that the samples are superparamagnetic at 300K and that the saturation magnetization values are in the range of \textasciitilde59-73 emu/g. The hyperthermic efficiency of the synthesized samples was tested in an external ac field of 252 kHz and a field strength of 15.9 kA/m. Significantly different values were obtained for the ILP parameter (in units nHm2/Kg): 5.77 (Zn0.098Mn0.447Fe2.455O4) ˃ 3.22 (Mn0.624Fe2.376O4) ˃ 2.04 (Zn0.182Mn0.344Fe2.474O4) ˃ 1.36 (Zn0.309Mn0.240Fe2.451O4) ˃ 1.01 (Zn0.394Mn0.138Fe2.468O4) ˃ 0.34 (Zn0.640Fe2.360O4). To explain the values of the ILP parameter, additional research is required, which includes the analysis of the influence of local defects and cation distribution on the magnetism of the investigated nanostructures. Also, significantly high ILP values indicate that some samples can be selected and further tested for in vitro/in vivo applications.",
publisher = "Society of Chemists and Technologists of Macedonia",
journal = "26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia",
title = "Engineering multi-core flower-like magnetic nanoparticles with high intrinsic loss power",
pages = "185-185",
url = "https://hdl.handle.net/21.15107/rcub_cer_7342"
}

Ognjanović, M., Radović, M., Mirković, M., Vranješ-Đurić, S., Dojčinović, B., Stanković, D.,& Antić, B.. (2023). Engineering multi-core flower-like magnetic nanoparticles with high intrinsic loss power. in 26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia
Society of Chemists and Technologists of Macedonia., 185-185.
https://hdl.handle.net/21.15107/rcub_cer_7342

Ognjanović M, Radović M, Mirković M, Vranješ-Đurić S, Dojčinović B, Stanković D, Antić B. Engineering multi-core flower-like magnetic nanoparticles with high intrinsic loss power. in 26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia. 2023;:185-185.
https://hdl.handle.net/21.15107/rcub_cer_7342 .

Ognjanović, Miloš, Radović, Magdalena, Mirković, Marija, Vranješ-Đurić, Sanja, Dojčinović, Biljana, Stanković, Dalibor, Antić, Bratislav, "Engineering multi-core flower-like magnetic nanoparticles with high intrinsic loss power" in 26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia (2023):185-185,
https://hdl.handle.net/21.15107/rcub_cer_7342 .

TY  - CONF
AU  - Mutić, Tijana
AU  - Stanković, Vesna
AU  - Ristivojević, Petar
AU  - Stanković, Dalibor
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7322
AB  - In this work, nickel oxide (NiO) nanoparticles were synthesized by the chemical coprecipitation method and used for modification of the carbon paste electrode for GA detection and determination. Morphological properties of prepared material were investigated using ICP-OES (inductively coupled plasma–optical emission spectrometry), XRD (X-ray diffraction), SEM and TEM (Scanning and Transmission Electron Microscopy). The electrochemical properties of the prepared electrode and the behavior of GA over the modified electrode were examined using CV (Cyclic Voltammetry), EIS (Electrochemical impedance spectroscopy), and SWV (Square Wave 
Voltammetry).
PB  - Belgrade : Serbian Chemical Society
PB  - Belgrade : Serbian Young Chemists’ Club
C3  - 9th Conference of Young Chemists of Serbia, Book of abstracts, 4th November 2023, Novi Sad, Serbia
T1  - Preparation of NiO supported carbon paste electrode for sensitive and selective determination of Gallic acid in plant samples
SP  - 125
EP  - 125
UR  - https://hdl.handle.net/21.15107/rcub_cer_7322
ER  - 

@conference{
author = "Mutić, Tijana and Stanković, Vesna and Ristivojević, Petar and Stanković, Dalibor",
year = "2023",
abstract = "In this work, nickel oxide (NiO) nanoparticles were synthesized by the chemical coprecipitation method and used for modification of the carbon paste electrode for GA detection and determination. Morphological properties of prepared material were investigated using ICP-OES (inductively coupled plasma–optical emission spectrometry), XRD (X-ray diffraction), SEM and TEM (Scanning and Transmission Electron Microscopy). The electrochemical properties of the prepared electrode and the behavior of GA over the modified electrode were examined using CV (Cyclic Voltammetry), EIS (Electrochemical impedance spectroscopy), and SWV (Square Wave 
Voltammetry).",
publisher = "Belgrade : Serbian Chemical Society, Belgrade : Serbian Young Chemists’ Club",
journal = "9th Conference of Young Chemists of Serbia, Book of abstracts, 4th November 2023, Novi Sad, Serbia",
title = "Preparation of NiO supported carbon paste electrode for sensitive and selective determination of Gallic acid in plant samples",
pages = "125-125",
url = "https://hdl.handle.net/21.15107/rcub_cer_7322"
}

Mutić, T., Stanković, V., Ristivojević, P.,& Stanković, D.. (2023). Preparation of NiO supported carbon paste electrode for sensitive and selective determination of Gallic acid in plant samples. in 9th Conference of Young Chemists of Serbia, Book of abstracts, 4th November 2023, Novi Sad, Serbia
Belgrade : Serbian Chemical Society., 125-125.
https://hdl.handle.net/21.15107/rcub_cer_7322

Mutić T, Stanković V, Ristivojević P, Stanković D. Preparation of NiO supported carbon paste electrode for sensitive and selective determination of Gallic acid in plant samples. in 9th Conference of Young Chemists of Serbia, Book of abstracts, 4th November 2023, Novi Sad, Serbia. 2023;:125-125.
https://hdl.handle.net/21.15107/rcub_cer_7322 .

Mutić, Tijana, Stanković, Vesna, Ristivojević, Petar, Stanković, Dalibor, "Preparation of NiO supported carbon paste electrode for sensitive and selective determination of Gallic acid in plant samples" in 9th Conference of Young Chemists of Serbia, Book of abstracts, 4th November 2023, Novi Sad, Serbia (2023):125-125,
https://hdl.handle.net/21.15107/rcub_cer_7322 .

TY  - CONF
AU  - Lugonja, Nikoleta
AU  - Stanković, Dalibor
AU  - Marinković, Vesna
AU  - Avdalović, Jelena
AU  - Spasić, Snežana
AU  - Vrvić, Miroslav
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7460
AB  - Background and objectives: Human milk is the golden standard in infant nutrition. A very important segment of nutritional support for premature children is milk banks. In milk banks, during the process of storage and pasteurization, the characteristics of milk change, and consequently, its quality changes as well. Current electrochemical techniques (green analytical chemistry) can be used to determine the quality of milk regarding its total antioxidant capacity (TAC). Methods: The application of various electrochemical methods, such as differential pulse voltammetry, cyclic voltammetry, polarography, or potentiometry, enables monitoring of the quality and redox capacity of human milk and infant food. Changes in the TAC of human milk were examined after thermal treatments, which are commonly used in milk banks, as well as after supplementation with a fortifier. Results: The results obtained using electrochemical methods were compared to the most commonly used spectrophotometric methods for monitoring total antioxidant capacity. The obtained results showed that electrochemical methods can overcome the limitations of spectrophotometric methods, such as lower sensitivity, slower reaction and insensitivity at higher antioxidant concentrations. Cyclic and differential pulse voltammetry methods can be successfully applied as fast methods for testing milk quality in milk banks and clinical studies. Conclusion: The tested electrochemical methods are fast, cheap, and reliable in determining TAC since they are based on direct measurement of electron-donating components of milk and enable the quantitative determination of TAC in human milk and infant food. They are very important for routine and daily determinations of TAC in infant food, as well as for the control of milk freshness, especially after using fortifiers in neonatal units.
PB  - MDPI
C3  - Proceedings
T1  - Every Drop Counts - The Current Methods for Determining the Quality of Human Milk
VL  - 91
IS  - 1
DO  - 10.3390/proceedings2023091314
ER  - 

@conference{
author = "Lugonja, Nikoleta and Stanković, Dalibor and Marinković, Vesna and Avdalović, Jelena and Spasić, Snežana and Vrvić, Miroslav",
year = "2023",
abstract = "Background and objectives: Human milk is the golden standard in infant nutrition. A very important segment of nutritional support for premature children is milk banks. In milk banks, during the process of storage and pasteurization, the characteristics of milk change, and consequently, its quality changes as well. Current electrochemical techniques (green analytical chemistry) can be used to determine the quality of milk regarding its total antioxidant capacity (TAC). Methods: The application of various electrochemical methods, such as differential pulse voltammetry, cyclic voltammetry, polarography, or potentiometry, enables monitoring of the quality and redox capacity of human milk and infant food. Changes in the TAC of human milk were examined after thermal treatments, which are commonly used in milk banks, as well as after supplementation with a fortifier. Results: The results obtained using electrochemical methods were compared to the most commonly used spectrophotometric methods for monitoring total antioxidant capacity. The obtained results showed that electrochemical methods can overcome the limitations of spectrophotometric methods, such as lower sensitivity, slower reaction and insensitivity at higher antioxidant concentrations. Cyclic and differential pulse voltammetry methods can be successfully applied as fast methods for testing milk quality in milk banks and clinical studies. Conclusion: The tested electrochemical methods are fast, cheap, and reliable in determining TAC since they are based on direct measurement of electron-donating components of milk and enable the quantitative determination of TAC in human milk and infant food. They are very important for routine and daily determinations of TAC in infant food, as well as for the control of milk freshness, especially after using fortifiers in neonatal units.",
publisher = "MDPI",
journal = "Proceedings",
title = "Every Drop Counts - The Current Methods for Determining the Quality of Human Milk",
volume = "91",
number = "1",
doi = "10.3390/proceedings2023091314"
}

Lugonja, N., Stanković, D., Marinković, V., Avdalović, J., Spasić, S.,& Vrvić, M.. (2023). Every Drop Counts - The Current Methods for Determining the Quality of Human Milk. in Proceedings
MDPI., 91(1).
https://doi.org/10.3390/proceedings2023091314

Lugonja N, Stanković D, Marinković V, Avdalović J, Spasić S, Vrvić M. Every Drop Counts - The Current Methods for Determining the Quality of Human Milk. in Proceedings. 2023;91(1).
doi:10.3390/proceedings2023091314 .

Lugonja, Nikoleta, Stanković, Dalibor, Marinković, Vesna, Avdalović, Jelena, Spasić, Snežana, Vrvić, Miroslav, "Every Drop Counts - The Current Methods for Determining the Quality of Human Milk" in Proceedings, 91, no. 1 (2023),
https://doi.org/10.3390/proceedings2023091314 . .

TY  - JOUR
AU  - Sentić, Milica
AU  - Trajković, Ivana
AU  - Manojlović, Dragan
AU  - Stanković, Dalibor
AU  - Nikolić, Maria Vesna
AU  - Šojić, Nešo
AU  - Vidić, Jasmina
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7109
AB  - Modern lifestyle has increased our utilization of pollutants such as heavy metals, aromatic 17 compounds, and contaminants of rising concern involving pharmaceutical and personal products 18 and other materials that may have an important environmental impact. Especially, the ultimate re-19 sults of intense use of highly stable materials, such as heavy metals and chemical restudies are that 20 they turn into waste materials which, when discharged, accumulate in the environment water bod-21 ies. In this context, the present review presents application of metal-organic frameworks (MOFs) in 22 electrochemiluminescent (ECL) sensing for water pollutant detection. MOF composites applied as 23 innovative luminophore or luminophore carriers, materials for electrode modification and enhance-24 ment of co-reaction in ECL sensors have enabled sensitive monitoring of some most common con-25 taminants of emerging concern such as heavy metals, volatile organic compounds, pharmaceuticals, 26 industrial chemicals and cyanotoxins. Moreover, we provide future trends and prospects associated 27 with ECL MOF-composites for environmental sensing.
PB  - MDPI
T2  - Materials
T1  - Luminescent Metal-Organic Frameworks for Electrochemiluminescent Detection of Water Pollutants
VL  - 16
IS  - 23
SP  - 7502
DO  - 10.3390/ma16237502
ER  - 

@article{
author = "Sentić, Milica and Trajković, Ivana and Manojlović, Dragan and Stanković, Dalibor and Nikolić, Maria Vesna and Šojić, Nešo and Vidić, Jasmina",
year = "2023",
abstract = "Modern lifestyle has increased our utilization of pollutants such as heavy metals, aromatic 17 compounds, and contaminants of rising concern involving pharmaceutical and personal products 18 and other materials that may have an important environmental impact. Especially, the ultimate re-19 sults of intense use of highly stable materials, such as heavy metals and chemical restudies are that 20 they turn into waste materials which, when discharged, accumulate in the environment water bod-21 ies. In this context, the present review presents application of metal-organic frameworks (MOFs) in 22 electrochemiluminescent (ECL) sensing for water pollutant detection. MOF composites applied as 23 innovative luminophore or luminophore carriers, materials for electrode modification and enhance-24 ment of co-reaction in ECL sensors have enabled sensitive monitoring of some most common con-25 taminants of emerging concern such as heavy metals, volatile organic compounds, pharmaceuticals, 26 industrial chemicals and cyanotoxins. Moreover, we provide future trends and prospects associated 27 with ECL MOF-composites for environmental sensing.",
publisher = "MDPI",
journal = "Materials",
title = "Luminescent Metal-Organic Frameworks for Electrochemiluminescent Detection of Water Pollutants",
volume = "16",
number = "23",
pages = "7502",
doi = "10.3390/ma16237502"
}

Sentić, M., Trajković, I., Manojlović, D., Stanković, D., Nikolić, M. V., Šojić, N.,& Vidić, J.. (2023). Luminescent Metal-Organic Frameworks for Electrochemiluminescent Detection of Water Pollutants. in Materials
MDPI., 16(23), 7502.
https://doi.org/10.3390/ma16237502

Sentić M, Trajković I, Manojlović D, Stanković D, Nikolić MV, Šojić N, Vidić J. Luminescent Metal-Organic Frameworks for Electrochemiluminescent Detection of Water Pollutants. in Materials. 2023;16(23):7502.
doi:10.3390/ma16237502 .

Sentić, Milica, Trajković, Ivana, Manojlović, Dragan, Stanković, Dalibor, Nikolić, Maria Vesna, Šojić, Nešo, Vidić, Jasmina, "Luminescent Metal-Organic Frameworks for Electrochemiluminescent Detection of Water Pollutants" in Materials, 16, no. 23 (2023):7502,
https://doi.org/10.3390/ma16237502 . .

TY  - CONF
AU  - Mutić, Tijana
AU  - Stanković, Vesna
AU  - Ognjanović, Miloš
AU  - Stanković, Dalibor
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7323
AB  - U ovom istraživanju, sintetisani su kompozitni nanomaterijali koji su korišćeni za modifikaciju elektrode od ugljenične paste. Materijali su sintetisani metodom koprecipitacije, a korišćene su soli nikla i bizmuta. Morfološke karakteristike materijala su ispitane skenirajućom i transmisionom elektronskom mikroskopijom i rendgenskom strukturnom analizom. Na osnovu ciklične voltametrije i elektrohemijske impedanse modifikovana elektroda pokazuje bolje elektrokatalitičke osobine od nemodifikovane elektrode.
PB  - Belgrade : Serbian Chemical Society
C3  - Knjiga izvoda - 9. Simpozijum Hemija i Zaštita Životne Sredine - EnviroChem2023, 4-7. jun 2023, Kladovo / Book of abstracts - 9 th Symposium Chemistry and Environmental Protection - EnviroChem2023, 4-7 th June 2023, Kladovo, Serbia
T1  - Electrochemical determination of nitrite in water samples using carbon paste  electrode modified with Ni/Bi oxide
T1  - Elektrohemijsko određivanje nitrita u uzorcima vode primenom elektrode od  ugljenične paste modifikovane Ni/Bi oksidom
SP  - 87
EP  - 88
UR  - https://hdl.handle.net/21.15107/rcub_cer_7323
ER  - 

@conference{
author = "Mutić, Tijana and Stanković, Vesna and Ognjanović, Miloš and Stanković, Dalibor",
year = "2023",
abstract = "U ovom istraživanju, sintetisani su kompozitni nanomaterijali koji su korišćeni za modifikaciju elektrode od ugljenične paste. Materijali su sintetisani metodom koprecipitacije, a korišćene su soli nikla i bizmuta. Morfološke karakteristike materijala su ispitane skenirajućom i transmisionom elektronskom mikroskopijom i rendgenskom strukturnom analizom. Na osnovu ciklične voltametrije i elektrohemijske impedanse modifikovana elektroda pokazuje bolje elektrokatalitičke osobine od nemodifikovane elektrode.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "Knjiga izvoda - 9. Simpozijum Hemija i Zaštita Životne Sredine - EnviroChem2023, 4-7. jun 2023, Kladovo / Book of abstracts - 9 th Symposium Chemistry and Environmental Protection - EnviroChem2023, 4-7 th June 2023, Kladovo, Serbia",
title = "Electrochemical determination of nitrite in water samples using carbon paste  electrode modified with Ni/Bi oxide, Elektrohemijsko određivanje nitrita u uzorcima vode primenom elektrode od  ugljenične paste modifikovane Ni/Bi oksidom",
pages = "87-88",
url = "https://hdl.handle.net/21.15107/rcub_cer_7323"
}

Mutić, T., Stanković, V., Ognjanović, M.,& Stanković, D.. (2023). Electrochemical determination of nitrite in water samples using carbon paste  electrode modified with Ni/Bi oxide. in Knjiga izvoda - 9. Simpozijum Hemija i Zaštita Životne Sredine - EnviroChem2023, 4-7. jun 2023, Kladovo / Book of abstracts - 9 th Symposium Chemistry and Environmental Protection - EnviroChem2023, 4-7 th June 2023, Kladovo, Serbia
Belgrade : Serbian Chemical Society., 87-88.
https://hdl.handle.net/21.15107/rcub_cer_7323

Mutić T, Stanković V, Ognjanović M, Stanković D. Electrochemical determination of nitrite in water samples using carbon paste  electrode modified with Ni/Bi oxide. in Knjiga izvoda - 9. Simpozijum Hemija i Zaštita Životne Sredine - EnviroChem2023, 4-7. jun 2023, Kladovo / Book of abstracts - 9 th Symposium Chemistry and Environmental Protection - EnviroChem2023, 4-7 th June 2023, Kladovo, Serbia. 2023;:87-88.
https://hdl.handle.net/21.15107/rcub_cer_7323 .

Mutić, Tijana, Stanković, Vesna, Ognjanović, Miloš, Stanković, Dalibor, "Electrochemical determination of nitrite in water samples using carbon paste  electrode modified with Ni/Bi oxide" in Knjiga izvoda - 9. Simpozijum Hemija i Zaštita Životne Sredine - EnviroChem2023, 4-7. jun 2023, Kladovo / Book of abstracts - 9 th Symposium Chemistry and Environmental Protection - EnviroChem2023, 4-7 th June 2023, Kladovo, Serbia (2023):87-88,
https://hdl.handle.net/21.15107/rcub_cer_7323 .

TY  - CONF
AU  - Mutić, Tijana
AU  - Ognjanović, Miloš
AU  - Stanković, Vesna
AU  - Stanković, Dalibor
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7324
AB  - In this work, a modified bismuth-oxychloride (BiOCl) carbon paste electrode was prepared for the 
detection of quinine. BiOCl nanoparticles were synthesized by the chemical coprecipitation method. The electrochemical properties of quinine at this electrode were investigated by cyclic 
voltammetry (CV), square wave voltammetry (SWV), and differential pulse voltammetry (DPV). 
In addition, electrochemical impedance spectroscopy (EIS), inductively coupled plasma–optical 
emission spectrometry (ICP-OES), transmission and scanning electron microscopy (TEM and 
SEM) and X-ray diffraction (XRD) were used to characterize the synthesized materials. The 
prepared electrode showed better electrocatalytic response than the bare carbon paste electrode.
PB  - University of Belgrade - Faculty of Chemistry
C3  - 28th Young Investigators' Seminar  on Analytical Chemistry YISAC 2023, Book of Abstracts, June 25th - 28th, 2023, Belgrade, Serbia
T1  - Fabrication of bismuth-oxychloride supported carbon paste electrode for sensitive and selective Quinine sensing
SP  - 25
EP  - 25
UR  - https://hdl.handle.net/21.15107/rcub_cer_7324
ER  - 

@conference{
author = "Mutić, Tijana and Ognjanović, Miloš and Stanković, Vesna and Stanković, Dalibor",
year = "2023",
abstract = "In this work, a modified bismuth-oxychloride (BiOCl) carbon paste electrode was prepared for the 
detection of quinine. BiOCl nanoparticles were synthesized by the chemical coprecipitation method. The electrochemical properties of quinine at this electrode were investigated by cyclic 
voltammetry (CV), square wave voltammetry (SWV), and differential pulse voltammetry (DPV). 
In addition, electrochemical impedance spectroscopy (EIS), inductively coupled plasma–optical 
emission spectrometry (ICP-OES), transmission and scanning electron microscopy (TEM and 
SEM) and X-ray diffraction (XRD) were used to characterize the synthesized materials. The 
prepared electrode showed better electrocatalytic response than the bare carbon paste electrode.",
publisher = "University of Belgrade - Faculty of Chemistry",
journal = "28th Young Investigators' Seminar  on Analytical Chemistry YISAC 2023, Book of Abstracts, June 25th - 28th, 2023, Belgrade, Serbia",
title = "Fabrication of bismuth-oxychloride supported carbon paste electrode for sensitive and selective Quinine sensing",
pages = "25-25",
url = "https://hdl.handle.net/21.15107/rcub_cer_7324"
}

Mutić, T., Ognjanović, M., Stanković, V.,& Stanković, D.. (2023). Fabrication of bismuth-oxychloride supported carbon paste electrode for sensitive and selective Quinine sensing. in 28th Young Investigators' Seminar  on Analytical Chemistry YISAC 2023, Book of Abstracts, June 25th - 28th, 2023, Belgrade, Serbia
University of Belgrade - Faculty of Chemistry., 25-25.
https://hdl.handle.net/21.15107/rcub_cer_7324

Mutić T, Ognjanović M, Stanković V, Stanković D. Fabrication of bismuth-oxychloride supported carbon paste electrode for sensitive and selective Quinine sensing. in 28th Young Investigators' Seminar  on Analytical Chemistry YISAC 2023, Book of Abstracts, June 25th - 28th, 2023, Belgrade, Serbia. 2023;:25-25.
https://hdl.handle.net/21.15107/rcub_cer_7324 .

Mutić, Tijana, Ognjanović, Miloš, Stanković, Vesna, Stanković, Dalibor, "Fabrication of bismuth-oxychloride supported carbon paste electrode for sensitive and selective Quinine sensing" in 28th Young Investigators' Seminar  on Analytical Chemistry YISAC 2023, Book of Abstracts, June 25th - 28th, 2023, Belgrade, Serbia (2023):25-25,
https://hdl.handle.net/21.15107/rcub_cer_7324 .

TY  - CONF
AU  - Mijajlović, Aleksandar
AU  - Stanković, Vesna
AU  - Đurđić, Slađana
AU  - Manojlović, Dragan
AU  - Stanković, Dalibor
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7357
AB  - Pesticides have a significant role in the world food chain in the setting of rising agricultural output demand and rising climate change impacts on agricultural productivity. Pesticide contamination across the world is not just a pressing issue; it also has the potential to get worse, for instance, because of movements in global production to nations with laxer environmental regulations [1]. In this work, we have designed a new electrochemical sensor for detecting bentazone (BZT) by using NP-Y2O3/g-C3N4 modified carbon paste electrode (CP). For the first time, the Pechini method was employed to synthesize the Y2O3 nanocomposite. The nanomaterial was characterized by Xray powder diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). In order to create an analytical technique for identifying and measuring BZT, the electrocatalytic characteristics of the suggested Y2O3/g-C3N4 modified CP electrode were examined. Using the CV and DPV approaches, the electrochemical behavior of BZT at the Y2O3/gC3N4 sensor was investigated. The proposed electrochemical sensor exhibited excellent electrochemical response toward BZT with a wide linear range of 1 to 100 µM, with a detection limit of 0.68 µM. The effect of possible interfering agents is negligible, confirming the good selectivity of the method. The sensor also displayed excellent sensitivity, reproducibility, and stability. Additionally, the Y2O3/g-C3N4 sensor was utilized for the detection of BZT in water and soil samples, and also in red and green pepper samples, and it exhibited good recovery results.
PB  - University of Belgrade : Faculty of Chemistry
C3  - 28th Young Investigators' Seminar  on Analytical Chemistry YISAC 2023, Book of Abstracts, June 25th - 28th, 2023, Belgrade, Serbia
T1  - A novel carbon paste electrode modified by NP-Y2O3 doped with the g-C3N4 for sensitive electrochemical detection of herbicide bentazone in river, soil, and vegetable samples
SP  - 26
EP  - 26
UR  - https://hdl.handle.net/21.15107/rcub_cer_7357
ER  - 

@conference{
author = "Mijajlović, Aleksandar and Stanković, Vesna and Đurđić, Slađana and Manojlović, Dragan and Stanković, Dalibor",
year = "2023",
abstract = "Pesticides have a significant role in the world food chain in the setting of rising agricultural output demand and rising climate change impacts on agricultural productivity. Pesticide contamination across the world is not just a pressing issue; it also has the potential to get worse, for instance, because of movements in global production to nations with laxer environmental regulations [1]. In this work, we have designed a new electrochemical sensor for detecting bentazone (BZT) by using NP-Y2O3/g-C3N4 modified carbon paste electrode (CP). For the first time, the Pechini method was employed to synthesize the Y2O3 nanocomposite. The nanomaterial was characterized by Xray powder diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). In order to create an analytical technique for identifying and measuring BZT, the electrocatalytic characteristics of the suggested Y2O3/g-C3N4 modified CP electrode were examined. Using the CV and DPV approaches, the electrochemical behavior of BZT at the Y2O3/gC3N4 sensor was investigated. The proposed electrochemical sensor exhibited excellent electrochemical response toward BZT with a wide linear range of 1 to 100 µM, with a detection limit of 0.68 µM. The effect of possible interfering agents is negligible, confirming the good selectivity of the method. The sensor also displayed excellent sensitivity, reproducibility, and stability. Additionally, the Y2O3/g-C3N4 sensor was utilized for the detection of BZT in water and soil samples, and also in red and green pepper samples, and it exhibited good recovery results.",
publisher = "University of Belgrade : Faculty of Chemistry",
journal = "28th Young Investigators' Seminar  on Analytical Chemistry YISAC 2023, Book of Abstracts, June 25th - 28th, 2023, Belgrade, Serbia",
title = "A novel carbon paste electrode modified by NP-Y2O3 doped with the g-C3N4 for sensitive electrochemical detection of herbicide bentazone in river, soil, and vegetable samples",
pages = "26-26",
url = "https://hdl.handle.net/21.15107/rcub_cer_7357"
}

Mijajlović, A., Stanković, V., Đurđić, S., Manojlović, D.,& Stanković, D.. (2023). A novel carbon paste electrode modified by NP-Y2O3 doped with the g-C3N4 for sensitive electrochemical detection of herbicide bentazone in river, soil, and vegetable samples. in 28th Young Investigators' Seminar  on Analytical Chemistry YISAC 2023, Book of Abstracts, June 25th - 28th, 2023, Belgrade, Serbia
University of Belgrade : Faculty of Chemistry., 26-26.
https://hdl.handle.net/21.15107/rcub_cer_7357

Mijajlović A, Stanković V, Đurđić S, Manojlović D, Stanković D. A novel carbon paste electrode modified by NP-Y2O3 doped with the g-C3N4 for sensitive electrochemical detection of herbicide bentazone in river, soil, and vegetable samples. in 28th Young Investigators' Seminar  on Analytical Chemistry YISAC 2023, Book of Abstracts, June 25th - 28th, 2023, Belgrade, Serbia. 2023;:26-26.
https://hdl.handle.net/21.15107/rcub_cer_7357 .

Mijajlović, Aleksandar, Stanković, Vesna, Đurđić, Slađana, Manojlović, Dragan, Stanković, Dalibor, "A novel carbon paste electrode modified by NP-Y2O3 doped with the g-C3N4 for sensitive electrochemical detection of herbicide bentazone in river, soil, and vegetable samples" in 28th Young Investigators' Seminar  on Analytical Chemistry YISAC 2023, Book of Abstracts, June 25th - 28th, 2023, Belgrade, Serbia (2023):26-26,
https://hdl.handle.net/21.15107/rcub_cer_7357 .

TY  - CONF
AU  - Mutić, Tijana
AU  - Ognjanović, Miloš
AU  - Stanković, Dalibor
AU  - Ražić, Slavica
PY  - 2023
UR  - https://www.euroanalysis2023.ch/Docs/EA23_Abstract_Book.pdf
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7321
AB  - In this study, a modified cobalt oxide (Co3O4) carbon paste electrode was prepared for the detection of Levofloxacin. Co3O4 nanoparticles were synthesized by the chemical coprecipitation method. The electrochemical properties of LEV at this electrode were investigated by cyclic voltammetry (CV), square wave voltammetry (SWV), and differential pulse voltammetry (DPV). In addition, electrochemical impedance spectroscopy (EIS), inductively coupled plasma–optical emission spectrometry (ICP-OES), transmission and scanning electron microscopy (TEM and SEM) and X-ray diffraction (XRD) were used to characterize the synthesized materials.
PB  - Division of Analytical Chemistry of the European Chemical Society
C3  - Abstract Book - Euroanalysis 2023 - "Analytical Probing  of Complex Systems", 27–31 August 2023, Geneva, Switzerland
T1  - Fabrication of cobalt oxide supported carbon paste electrode for sensitive and selective Levofloxacin sensing
SP  - 302
EP  - 303
UR  - https://hdl.handle.net/21.15107/rcub_cer_7321
ER  - 

@conference{
author = "Mutić, Tijana and Ognjanović, Miloš and Stanković, Dalibor and Ražić, Slavica",
year = "2023",
abstract = "In this study, a modified cobalt oxide (Co3O4) carbon paste electrode was prepared for the detection of Levofloxacin. Co3O4 nanoparticles were synthesized by the chemical coprecipitation method. The electrochemical properties of LEV at this electrode were investigated by cyclic voltammetry (CV), square wave voltammetry (SWV), and differential pulse voltammetry (DPV). In addition, electrochemical impedance spectroscopy (EIS), inductively coupled plasma–optical emission spectrometry (ICP-OES), transmission and scanning electron microscopy (TEM and SEM) and X-ray diffraction (XRD) were used to characterize the synthesized materials.",
publisher = "Division of Analytical Chemistry of the European Chemical Society",
journal = "Abstract Book - Euroanalysis 2023 - "Analytical Probing  of Complex Systems", 27–31 August 2023, Geneva, Switzerland",
title = "Fabrication of cobalt oxide supported carbon paste electrode for sensitive and selective Levofloxacin sensing",
pages = "302-303",
url = "https://hdl.handle.net/21.15107/rcub_cer_7321"
}

Mutić, T., Ognjanović, M., Stanković, D.,& Ražić, S.. (2023). Fabrication of cobalt oxide supported carbon paste electrode for sensitive and selective Levofloxacin sensing. in Abstract Book - Euroanalysis 2023 - "Analytical Probing  of Complex Systems", 27–31 August 2023, Geneva, Switzerland
Division of Analytical Chemistry of the European Chemical Society., 302-303.
https://hdl.handle.net/21.15107/rcub_cer_7321

Mutić T, Ognjanović M, Stanković D, Ražić S. Fabrication of cobalt oxide supported carbon paste electrode for sensitive and selective Levofloxacin sensing. in Abstract Book - Euroanalysis 2023 - "Analytical Probing  of Complex Systems", 27–31 August 2023, Geneva, Switzerland. 2023;:302-303.
https://hdl.handle.net/21.15107/rcub_cer_7321 .

Mutić, Tijana, Ognjanović, Miloš, Stanković, Dalibor, Ražić, Slavica, "Fabrication of cobalt oxide supported carbon paste electrode for sensitive and selective Levofloxacin sensing" in Abstract Book - Euroanalysis 2023 - "Analytical Probing  of Complex Systems", 27–31 August 2023, Geneva, Switzerland (2023):302-303,
https://hdl.handle.net/21.15107/rcub_cer_7321 .

TY  - JOUR
AU  - Knežević, Sara
AU  - Ostojić, Jelena
AU  - Ognjanović, Miloš
AU  - Savić, Slađana
AU  - Kovačević, Aleksandra
AU  - Manojlović, Dragan
AU  - Stanković, Vesna
AU  - Stanković, Dalibor
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5389
AB  - Triclosan (TCS) is a polychlorinated phenoxy phenol (PCPPs) used as a disinfectant and a broad-spectrum antibacterial and antifungal agent in personal hygiene products. TCS easily forms diphenyl ethers and dioxins, which are persistent organic pollutants. This work used a double approach for the TSC sensing: a) screen-printed (SPE) electrochemical platform for on-site application, modified with lanthanum iron oxide and graphitic carbon nitride composite (LaFeO3/Fe2O3@g-C3N4/SPE); and b) carbon paste electrode (CPE), modified with the same material and used in laboratory conditions. Linear range from 0.1 μM to 10 μM, the limit of detection (LOD) of 29 nM and the limit of quantification (LOQ) of 91 nM were obtained for CP electrode in BRBS pH 8. SPE showed the best analytical parameters in BRBS at pH 3, with a linear range from 0.3 μM to 7 μM, LOD of 0.09 μM and LOQ of 0.28 μM. Furthermore, the influence of potential interferents was investigated and proven to be negligible. Determination of TSC was performed to estimate the environmental impact of this compound as well as the practical usefulness of the proposed sensor in the real sample analysis, confirmed with a HPLC analysis.
PB  - Elsevier
T2  - Science of the Total Environment
T1  - The environmentally friendly approaches based on the heterojunction interface of the LaFeO3/Fe2O3@g-C3N4 composite for the disposable and laboratory sensing of triclosan
VL  - 857
SP  - 159250
DO  - 10.1016/j.scitotenv.2022.159250
ER  - 

@article{
author = "Knežević, Sara and Ostojić, Jelena and Ognjanović, Miloš and Savić, Slađana and Kovačević, Aleksandra and Manojlović, Dragan and Stanković, Vesna and Stanković, Dalibor",
year = "2023",
abstract = "Triclosan (TCS) is a polychlorinated phenoxy phenol (PCPPs) used as a disinfectant and a broad-spectrum antibacterial and antifungal agent in personal hygiene products. TCS easily forms diphenyl ethers and dioxins, which are persistent organic pollutants. This work used a double approach for the TSC sensing: a) screen-printed (SPE) electrochemical platform for on-site application, modified with lanthanum iron oxide and graphitic carbon nitride composite (LaFeO3/Fe2O3@g-C3N4/SPE); and b) carbon paste electrode (CPE), modified with the same material and used in laboratory conditions. Linear range from 0.1 μM to 10 μM, the limit of detection (LOD) of 29 nM and the limit of quantification (LOQ) of 91 nM were obtained for CP electrode in BRBS pH 8. SPE showed the best analytical parameters in BRBS at pH 3, with a linear range from 0.3 μM to 7 μM, LOD of 0.09 μM and LOQ of 0.28 μM. Furthermore, the influence of potential interferents was investigated and proven to be negligible. Determination of TSC was performed to estimate the environmental impact of this compound as well as the practical usefulness of the proposed sensor in the real sample analysis, confirmed with a HPLC analysis.",
publisher = "Elsevier",
journal = "Science of the Total Environment",
title = "The environmentally friendly approaches based on the heterojunction interface of the LaFeO3/Fe2O3@g-C3N4 composite for the disposable and laboratory sensing of triclosan",
volume = "857",
pages = "159250",
doi = "10.1016/j.scitotenv.2022.159250"
}

Knežević, S., Ostojić, J., Ognjanović, M., Savić, S., Kovačević, A., Manojlović, D., Stanković, V.,& Stanković, D.. (2023). The environmentally friendly approaches based on the heterojunction interface of the LaFeO3/Fe2O3@g-C3N4 composite for the disposable and laboratory sensing of triclosan. in Science of the Total Environment
Elsevier., 857, 159250.
https://doi.org/10.1016/j.scitotenv.2022.159250

Knežević S, Ostojić J, Ognjanović M, Savić S, Kovačević A, Manojlović D, Stanković V, Stanković D. The environmentally friendly approaches based on the heterojunction interface of the LaFeO3/Fe2O3@g-C3N4 composite for the disposable and laboratory sensing of triclosan. in Science of the Total Environment. 2023;857:159250.
doi:10.1016/j.scitotenv.2022.159250 .

Knežević, Sara, Ostojić, Jelena, Ognjanović, Miloš, Savić, Slađana, Kovačević, Aleksandra, Manojlović, Dragan, Stanković, Vesna, Stanković, Dalibor, "The environmentally friendly approaches based on the heterojunction interface of the LaFeO3/Fe2O3@g-C3N4 composite for the disposable and laboratory sensing of triclosan" in Science of the Total Environment, 857 (2023):159250,
https://doi.org/10.1016/j.scitotenv.2022.159250 . .

TY  - JOUR
AU  - Anđelković, Ljubica
AU  - Šuljagić, Marija
AU  - Mirković, Miljana
AU  - Pavlović, Vera
AU  - Petronijević, Ivan
AU  - Stanković, Dalibor
AU  - Jeremić, Dejan
AU  - Uskoković, Vuk
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6199
AB  - The combination of an intense absorption of visible light and p-type semiconducting nature makes spinel cobalt oxide (Co3O4) a very attractive material for various optoelectronic applications. However, the traditional methods for its synthesis have been either time- and energy-consuming or relying on toxic chemicals. To solve this issue, a simple, facile, and eco-friendly method of synthesis was successfully developed to obtain spinel Co3O4 nanoparticles. The novel method for obtaining pure and monophasic Co3O4 reported here is based on the thermal decomposition of hexaaquacobalt(II) D-camphor10-sulfonate at 900 °C. This fast solid-state synthesis route overcomes the disadvantages of many combustion methods, most critically by avoiding the use of toxic organic solvents. The synthesized material was subjected to a detailed characterization to assess its potential for use as a nanocatalyst. The band gap measurements indicated the presence of two band gaps, one at 2.10 eV and another at 1.22 eV, confirming the purity and semiconducting properties of the sample. The electrochemical studies demonstrated a significant enhancement in the electron transfer kinetics with the addition of the synthesized Co3O4 to the carbon-paste electrode, leading to an enhanced electrocatalytic performance. These prominent functional properties, suitable for a wide range of technological applications, pave way for the implementation of the reported method for the synthesis of Co3O4 on a larger industrial scale.
PB  - Elsevier
T2  - Ceramics International
T1  - Semiconducting cobalt oxide nanocatalyst obtained through an eco-friendly thermal decomposition
DO  - 10.1016/j.ceramint.2023.04.182
ER  - 

@article{
author = "Anđelković, Ljubica and Šuljagić, Marija and Mirković, Miljana and Pavlović, Vera and Petronijević, Ivan and Stanković, Dalibor and Jeremić, Dejan and Uskoković, Vuk",
year = "2023",
abstract = "The combination of an intense absorption of visible light and p-type semiconducting nature makes spinel cobalt oxide (Co3O4) a very attractive material for various optoelectronic applications. However, the traditional methods for its synthesis have been either time- and energy-consuming or relying on toxic chemicals. To solve this issue, a simple, facile, and eco-friendly method of synthesis was successfully developed to obtain spinel Co3O4 nanoparticles. The novel method for obtaining pure and monophasic Co3O4 reported here is based on the thermal decomposition of hexaaquacobalt(II) D-camphor10-sulfonate at 900 °C. This fast solid-state synthesis route overcomes the disadvantages of many combustion methods, most critically by avoiding the use of toxic organic solvents. The synthesized material was subjected to a detailed characterization to assess its potential for use as a nanocatalyst. The band gap measurements indicated the presence of two band gaps, one at 2.10 eV and another at 1.22 eV, confirming the purity and semiconducting properties of the sample. The electrochemical studies demonstrated a significant enhancement in the electron transfer kinetics with the addition of the synthesized Co3O4 to the carbon-paste electrode, leading to an enhanced electrocatalytic performance. These prominent functional properties, suitable for a wide range of technological applications, pave way for the implementation of the reported method for the synthesis of Co3O4 on a larger industrial scale.",
publisher = "Elsevier",
journal = "Ceramics International",
title = "Semiconducting cobalt oxide nanocatalyst obtained through an eco-friendly thermal decomposition",
doi = "10.1016/j.ceramint.2023.04.182"
}

Anđelković, L., Šuljagić, M., Mirković, M., Pavlović, V., Petronijević, I., Stanković, D., Jeremić, D.,& Uskoković, V.. (2023). Semiconducting cobalt oxide nanocatalyst obtained through an eco-friendly thermal decomposition. in Ceramics International
Elsevier..
https://doi.org/10.1016/j.ceramint.2023.04.182

Anđelković L, Šuljagić M, Mirković M, Pavlović V, Petronijević I, Stanković D, Jeremić D, Uskoković V. Semiconducting cobalt oxide nanocatalyst obtained through an eco-friendly thermal decomposition. in Ceramics International. 2023;.
doi:10.1016/j.ceramint.2023.04.182 .

Anđelković, Ljubica, Šuljagić, Marija, Mirković, Miljana, Pavlović, Vera, Petronijević, Ivan, Stanković, Dalibor, Jeremić, Dejan, Uskoković, Vuk, "Semiconducting cobalt oxide nanocatalyst obtained through an eco-friendly thermal decomposition" in Ceramics International (2023),
https://doi.org/10.1016/j.ceramint.2023.04.182 . .

TY  - JOUR
AU  - Knežević, Sara
AU  - Terzić-Jovanović, Nataša
AU  - Vlahović, Filip
AU  - Ajdačić, Vladimir
AU  - Costache, Vlad
AU  - Vidić, Jasmina
AU  - Opsenica, Igor
AU  - Stanković, Dalibor
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7175
AB  - Covalent organic frameworks (COFs) are emerging as promising sensing materials due to their controllable structure and function properties, as well as excellent physicochemical characteristics. Here, specific interactions between a triazine-based COF and a mass-used herbicide – glyphosate (GLY) have been utilized to design a disposable sensing platform for GLY detection. This herbicide has been extensively used for decades, however, its harmful environmental impact and toxicity to humans have been recently proven, conditioning the necessity for the strict control and monitoring of its use and its presence in soil, water, and food. Glyphosate is an organophosphorus compound, and its detection in complex matrices usually requires laborious pretreatment. Here, we developed a direct, miniaturized, robust, and green approach for disposable electrochemical sensing of glyphosate, utilizing COF's ability to selectively capture and concentrate negatively charged glyphosate molecules inside its nanopores. This process generates the concentration gradient of GLY, accelerating its diffusion towards the electrode surface. Simultaneously, specific COF-glyphosate binding catalyses the oxidative cleavage of the C–P bond and, together with pore nanoconfinement, enables sensitive glyphosate detection. Detailed sensing principles and selectiveness were scrutinized using DFT-based modelling. The proposed electrochemical method has a linear working range from 0.1 μM to 10 μM, a low limit of detection of 96 nM, and a limit of quantification of 320 nM. The elaborated sensing approach is viable for use in real sample matrices and tested for GLY determination in soil and water samples, without pretreatment, preparation, or purification. The results showed the practical usefulness of the sensor in the real sample analysis and suggested its suitability for possible out-of-laboratory sensing.
PB  - Elsevier
T2  - Chemosphere
T1  - Direct glyphosate soil monitoring at the triazine-based covalent organic framework with the theoretical study of sensing principle
VL  - 341
SP  - 139930
DO  - 10.1016/j.chemosphere.2023.139930
ER  - 

@article{
author = "Knežević, Sara and Terzić-Jovanović, Nataša and Vlahović, Filip and Ajdačić, Vladimir and Costache, Vlad and Vidić, Jasmina and Opsenica, Igor and Stanković, Dalibor",
year = "2023",
abstract = "Covalent organic frameworks (COFs) are emerging as promising sensing materials due to their controllable structure and function properties, as well as excellent physicochemical characteristics. Here, specific interactions between a triazine-based COF and a mass-used herbicide – glyphosate (GLY) have been utilized to design a disposable sensing platform for GLY detection. This herbicide has been extensively used for decades, however, its harmful environmental impact and toxicity to humans have been recently proven, conditioning the necessity for the strict control and monitoring of its use and its presence in soil, water, and food. Glyphosate is an organophosphorus compound, and its detection in complex matrices usually requires laborious pretreatment. Here, we developed a direct, miniaturized, robust, and green approach for disposable electrochemical sensing of glyphosate, utilizing COF's ability to selectively capture and concentrate negatively charged glyphosate molecules inside its nanopores. This process generates the concentration gradient of GLY, accelerating its diffusion towards the electrode surface. Simultaneously, specific COF-glyphosate binding catalyses the oxidative cleavage of the C–P bond and, together with pore nanoconfinement, enables sensitive glyphosate detection. Detailed sensing principles and selectiveness were scrutinized using DFT-based modelling. The proposed electrochemical method has a linear working range from 0.1 μM to 10 μM, a low limit of detection of 96 nM, and a limit of quantification of 320 nM. The elaborated sensing approach is viable for use in real sample matrices and tested for GLY determination in soil and water samples, without pretreatment, preparation, or purification. The results showed the practical usefulness of the sensor in the real sample analysis and suggested its suitability for possible out-of-laboratory sensing.",
publisher = "Elsevier",
journal = "Chemosphere",
title = "Direct glyphosate soil monitoring at the triazine-based covalent organic framework with the theoretical study of sensing principle",
volume = "341",
pages = "139930",
doi = "10.1016/j.chemosphere.2023.139930"
}

Knežević, S., Terzić-Jovanović, N., Vlahović, F., Ajdačić, V., Costache, V., Vidić, J., Opsenica, I.,& Stanković, D.. (2023). Direct glyphosate soil monitoring at the triazine-based covalent organic framework with the theoretical study of sensing principle. in Chemosphere
Elsevier., 341, 139930.
https://doi.org/10.1016/j.chemosphere.2023.139930

Knežević S, Terzić-Jovanović N, Vlahović F, Ajdačić V, Costache V, Vidić J, Opsenica I, Stanković D. Direct glyphosate soil monitoring at the triazine-based covalent organic framework with the theoretical study of sensing principle. in Chemosphere. 2023;341:139930.
doi:10.1016/j.chemosphere.2023.139930 .

Knežević, Sara, Terzić-Jovanović, Nataša, Vlahović, Filip, Ajdačić, Vladimir, Costache, Vlad, Vidić, Jasmina, Opsenica, Igor, Stanković, Dalibor, "Direct glyphosate soil monitoring at the triazine-based covalent organic framework with the theoretical study of sensing principle" in Chemosphere, 341 (2023):139930,
https://doi.org/10.1016/j.chemosphere.2023.139930 . .

TY  - JOUR
AU  - Korina, Elena
AU  - Abramyan, Anton
AU  - Bol’shakov, Oleg
AU  - Avdin, Vyacheslav V.
AU  - Savić, Sladjana
AU  - Manojlović, Dragan
AU  - Stanković, Vesna
AU  - Stanković, Dalibor M.
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5657
AB  - Stable, water-soluble titanium complexed with mandelic acid was used as a precursor for titanium phosphorus double oxide obtained in hydrothermal conditions in the presence of phosphoric acid. Surprisingly, hydrolysis of organic complexes provided a microstructured sphere with narrow size distribution, low aggregation and a small fraction of morphological irregularities. Obtained microspheres had a complex structure comprised of flakes, whose size could be manipulated with temperature conditions. Samples were found to be electrochemically active against sulcotrione, a well-recognized herbicide. Electrochemical sensors based on the synthesized microspheres were successfully adapted for natural water reservoir analysis and exhibited low levels of detection of 0.61 µM, limit of quantification of 1.86 µM, wide dynamic linear range from 2 to 200 µM, good selectivity, excellent reproducibility and in-time stability.
PB  - Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)
T2  - Sensors
T1  - Microspherical Titanium-Phosphorus Double Oxide: Hierarchical Structure Development for Sensing Applications
VL  - 23
IS  - 2
SP  - 933
DO  - 10.3390/s23020933
ER  - 

@article{
author = "Korina, Elena and Abramyan, Anton and Bol’shakov, Oleg and Avdin, Vyacheslav V. and Savić, Sladjana and Manojlović, Dragan and Stanković, Vesna and Stanković, Dalibor M.",
year = "2023",
abstract = "Stable, water-soluble titanium complexed with mandelic acid was used as a precursor for titanium phosphorus double oxide obtained in hydrothermal conditions in the presence of phosphoric acid. Surprisingly, hydrolysis of organic complexes provided a microstructured sphere with narrow size distribution, low aggregation and a small fraction of morphological irregularities. Obtained microspheres had a complex structure comprised of flakes, whose size could be manipulated with temperature conditions. Samples were found to be electrochemically active against sulcotrione, a well-recognized herbicide. Electrochemical sensors based on the synthesized microspheres were successfully adapted for natural water reservoir analysis and exhibited low levels of detection of 0.61 µM, limit of quantification of 1.86 µM, wide dynamic linear range from 2 to 200 µM, good selectivity, excellent reproducibility and in-time stability.",
publisher = "Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)",
journal = "Sensors",
title = "Microspherical Titanium-Phosphorus Double Oxide: Hierarchical Structure Development for Sensing Applications",
volume = "23",
number = "2",
pages = "933",
doi = "10.3390/s23020933"
}

Korina, E., Abramyan, A., Bol’shakov, O., Avdin, V. V., Savić, S., Manojlović, D., Stanković, V.,& Stanković, D. M.. (2023). Microspherical Titanium-Phosphorus Double Oxide: Hierarchical Structure Development for Sensing Applications. in Sensors
Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)., 23(2), 933.
https://doi.org/10.3390/s23020933

Korina E, Abramyan A, Bol’shakov O, Avdin VV, Savić S, Manojlović D, Stanković V, Stanković DM. Microspherical Titanium-Phosphorus Double Oxide: Hierarchical Structure Development for Sensing Applications. in Sensors. 2023;23(2):933.
doi:10.3390/s23020933 .

Korina, Elena, Abramyan, Anton, Bol’shakov, Oleg, Avdin, Vyacheslav V., Savić, Sladjana, Manojlović, Dragan, Stanković, Vesna, Stanković, Dalibor M., "Microspherical Titanium-Phosphorus Double Oxide: Hierarchical Structure Development for Sensing Applications" in Sensors, 23, no. 2 (2023):933,
https://doi.org/10.3390/s23020933 . .

TY  - JOUR
AU  - Mijajlović, Aleksandar
AU  - Ognjanović, Miloš
AU  - Manojlović, Dragan
AU  - Vlahović, Filip
AU  - Ðurđić, Slađana
AU  - Stanković, Vesna
AU  - Stanković, Dalibor
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5694
AB  - There are ten million people in the world who have Parkinson’s disease. The most potent medicine for Parkinson’s disease is levodopa (L-DOPA). However, long-term consumption of L-DOPA leads to the appearance of side effects, as a result of which the control and monitoring of its concentrations are of great importance. In this work, we have designed a new electrochemical sensor for detecting L-DOPA using a carbon paste electrode (CPE) modified with Eu2O3@Cr2O3 composite nanoparticles. Rare earth elements, including Eu, are increasingly used to design new electrode nanocomposites with enhanced electrocatalytic properties. Europium has been considered a significant lanthanide element with greater redox reaction behavior. We conducted a hydrothermal synthesis of Eu2O3@Cr2O3 and, for the first time, the acquired nanoparticles were used to modify CPE. The proposed Eu2O3@Cr2O3/CPE electrode was investigated in terms of its electrocatalytic properties and then used to develop an analytical method for detecting and quantifying L-DOPA. The proposed sensor offers a wide linear range (1–100 µM), high sensitivity (1.38 µA µM−1 cm−2) and a low detection limit (0.72 µM). The practical application of the proposed sensor was investigated by analyzing commercially available pharmaceutical tablets of L-DOPA. The corresponding results indicate the excellent potential of the Eu2O3@Cr2O3/CPE sensor for application in real-time L-DOPA detection.
PB  - Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)
T2  - Biosensors
T1  - Eu2O3@Cr2O3 Nanoparticles-Modified Carbon Paste Electrode for Efficient Electrochemical Sensing of Neurotransmitters Precursor L-DOPA
VL  - 13
IS  - 2
SP  - 201
DO  - 10.3390/bios13020201
ER  - 

@article{
author = "Mijajlović, Aleksandar and Ognjanović, Miloš and Manojlović, Dragan and Vlahović, Filip and Ðurđić, Slađana and Stanković, Vesna and Stanković, Dalibor",
year = "2023",
abstract = "There are ten million people in the world who have Parkinson’s disease. The most potent medicine for Parkinson’s disease is levodopa (L-DOPA). However, long-term consumption of L-DOPA leads to the appearance of side effects, as a result of which the control and monitoring of its concentrations are of great importance. In this work, we have designed a new electrochemical sensor for detecting L-DOPA using a carbon paste electrode (CPE) modified with Eu2O3@Cr2O3 composite nanoparticles. Rare earth elements, including Eu, are increasingly used to design new electrode nanocomposites with enhanced electrocatalytic properties. Europium has been considered a significant lanthanide element with greater redox reaction behavior. We conducted a hydrothermal synthesis of Eu2O3@Cr2O3 and, for the first time, the acquired nanoparticles were used to modify CPE. The proposed Eu2O3@Cr2O3/CPE electrode was investigated in terms of its electrocatalytic properties and then used to develop an analytical method for detecting and quantifying L-DOPA. The proposed sensor offers a wide linear range (1–100 µM), high sensitivity (1.38 µA µM−1 cm−2) and a low detection limit (0.72 µM). The practical application of the proposed sensor was investigated by analyzing commercially available pharmaceutical tablets of L-DOPA. The corresponding results indicate the excellent potential of the Eu2O3@Cr2O3/CPE sensor for application in real-time L-DOPA detection.",
publisher = "Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)",
journal = "Biosensors",
title = "Eu2O3@Cr2O3 Nanoparticles-Modified Carbon Paste Electrode for Efficient Electrochemical Sensing of Neurotransmitters Precursor L-DOPA",
volume = "13",
number = "2",
pages = "201",
doi = "10.3390/bios13020201"
}

Mijajlović, A., Ognjanović, M., Manojlović, D., Vlahović, F., Ðurđić, S., Stanković, V.,& Stanković, D.. (2023). Eu2O3@Cr2O3 Nanoparticles-Modified Carbon Paste Electrode for Efficient Electrochemical Sensing of Neurotransmitters Precursor L-DOPA. in Biosensors
Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)., 13(2), 201.
https://doi.org/10.3390/bios13020201

Mijajlović A, Ognjanović M, Manojlović D, Vlahović F, Ðurđić S, Stanković V, Stanković D. Eu2O3@Cr2O3 Nanoparticles-Modified Carbon Paste Electrode for Efficient Electrochemical Sensing of Neurotransmitters Precursor L-DOPA. in Biosensors. 2023;13(2):201.
doi:10.3390/bios13020201 .

Mijajlović, Aleksandar, Ognjanović, Miloš, Manojlović, Dragan, Vlahović, Filip, Ðurđić, Slađana, Stanković, Vesna, Stanković, Dalibor, "Eu2O3@Cr2O3 Nanoparticles-Modified Carbon Paste Electrode for Efficient Electrochemical Sensing of Neurotransmitters Precursor L-DOPA" in Biosensors, 13, no. 2 (2023):201,
https://doi.org/10.3390/bios13020201 . .

TY  - JOUR
AU  - Đurđić, Slađana
AU  - Vlahović, Filip
AU  - Markićević, Milan
AU  - Mutić, Jelena
AU  - Manojlović, Dragan
AU  - Stanković, Vesna
AU  - Švorc, Ľubomír
AU  - Stanković, Dalibor
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5774
AB  - Herein, a screen–printed diamond electrode (SPDE) coupled with a “point-of-care” platform (30 µL-drop concepts, single-drop-detection approach) was successfully applied for the electrochemical determination of pterostilbene (PTS). Cyclic voltammetry identified irreversible oxidation of PTS, where oxidation peak was shown to be strongly dependent on the pH of the working environmental. Although the proposition of the detailed electrochemical oxidation mechanism of PTS goes out of the scope of the present research, we have determined the most probable reactive site of our analyte, by utilizing DFT-based reactivity descriptors (Fukui functions). For electrochemical quantification of PTS, oxidation peak at 0.32 V (vs. Ag/AgCl) was followed in presence of 0.5 mol L−1 of Briton–Robinson buffer solution (pH = 9). Coupled with the optimized parameters of differential pulse voltammetry (DPV), SPDE detected PTS in two linear ranges (first range was from 0.011 to 0.912 µmol L−1; second range was from 0.912 to 4.420 µmol L−1), providing the LOD and LOQ on a nanomolar level (3.1 nmol L−1 and 10.0 nmol L−1, respectively). The selectivity of the optimized DPV method was found to be excellent, with the current changes of less than 7%, in the presence of ten times higher concentrations of the certain interferences. The practical applicability of the SPDE and single-drop-detection approach in dietary supplements (with a declared PTS content of 50 mg/tablet), with the recovery values ranging from 95 to 102%, shows that the developed method has high potential for precise and accurate PTS detection, as well as exceptional miniaturization possibilities of relevant equipment for on-site sensing.
PB  - Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)
T2  - Chemosensors
T1  - Application of Screen Printed Diamond Electrode, Coupled with “Point-of-Care” Platform, for Nanomolar Quantification of Phytonutrient Pterostilbene in Dietary Supplements: An Experimental Study Supported by Theory
VL  - 11
IS  - 1
SP  - 15
DO  - 10.3390/chemosensors11010015
ER  - 

@article{
author = "Đurđić, Slađana and Vlahović, Filip and Markićević, Milan and Mutić, Jelena and Manojlović, Dragan and Stanković, Vesna and Švorc, Ľubomír and Stanković, Dalibor",
year = "2023",
abstract = "Herein, a screen–printed diamond electrode (SPDE) coupled with a “point-of-care” platform (30 µL-drop concepts, single-drop-detection approach) was successfully applied for the electrochemical determination of pterostilbene (PTS). Cyclic voltammetry identified irreversible oxidation of PTS, where oxidation peak was shown to be strongly dependent on the pH of the working environmental. Although the proposition of the detailed electrochemical oxidation mechanism of PTS goes out of the scope of the present research, we have determined the most probable reactive site of our analyte, by utilizing DFT-based reactivity descriptors (Fukui functions). For electrochemical quantification of PTS, oxidation peak at 0.32 V (vs. Ag/AgCl) was followed in presence of 0.5 mol L−1 of Briton–Robinson buffer solution (pH = 9). Coupled with the optimized parameters of differential pulse voltammetry (DPV), SPDE detected PTS in two linear ranges (first range was from 0.011 to 0.912 µmol L−1; second range was from 0.912 to 4.420 µmol L−1), providing the LOD and LOQ on a nanomolar level (3.1 nmol L−1 and 10.0 nmol L−1, respectively). The selectivity of the optimized DPV method was found to be excellent, with the current changes of less than 7%, in the presence of ten times higher concentrations of the certain interferences. The practical applicability of the SPDE and single-drop-detection approach in dietary supplements (with a declared PTS content of 50 mg/tablet), with the recovery values ranging from 95 to 102%, shows that the developed method has high potential for precise and accurate PTS detection, as well as exceptional miniaturization possibilities of relevant equipment for on-site sensing.",
publisher = "Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)",
journal = "Chemosensors",
title = "Application of Screen Printed Diamond Electrode, Coupled with “Point-of-Care” Platform, for Nanomolar Quantification of Phytonutrient Pterostilbene in Dietary Supplements: An Experimental Study Supported by Theory",
volume = "11",
number = "1",
pages = "15",
doi = "10.3390/chemosensors11010015"
}

Đurđić, S., Vlahović, F., Markićević, M., Mutić, J., Manojlović, D., Stanković, V., Švorc, Ľ.,& Stanković, D.. (2023). Application of Screen Printed Diamond Electrode, Coupled with “Point-of-Care” Platform, for Nanomolar Quantification of Phytonutrient Pterostilbene in Dietary Supplements: An Experimental Study Supported by Theory. in Chemosensors
Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)., 11(1), 15.
https://doi.org/10.3390/chemosensors11010015

Đurđić S, Vlahović F, Markićević M, Mutić J, Manojlović D, Stanković V, Švorc Ľ, Stanković D. Application of Screen Printed Diamond Electrode, Coupled with “Point-of-Care” Platform, for Nanomolar Quantification of Phytonutrient Pterostilbene in Dietary Supplements: An Experimental Study Supported by Theory. in Chemosensors. 2023;11(1):15.
doi:10.3390/chemosensors11010015 .

Đurđić, Slađana, Vlahović, Filip, Markićević, Milan, Mutić, Jelena, Manojlović, Dragan, Stanković, Vesna, Švorc, Ľubomír, Stanković, Dalibor, "Application of Screen Printed Diamond Electrode, Coupled with “Point-of-Care” Platform, for Nanomolar Quantification of Phytonutrient Pterostilbene in Dietary Supplements: An Experimental Study Supported by Theory" in Chemosensors, 11, no. 1 (2023):15,
https://doi.org/10.3390/chemosensors11010015 . .

TY  - CONF
AU  - Lugonja, Nikoleta
AU  - Lončarević, Branka
AU  - Stanković, Dalibor
AU  - Lješević, Marija
AU  - Avdalović, Jelena
AU  - Spasić, Snežana
AU  - Beškoski, Vladimir
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6877
AB  - The aim of this study was to research the influence of apple pectin in infant nutrition, its impact on selected bacteria of the infant’s gastrointestinal tract, gas production and total antioxidant capacity by electrochemical determination of changes in redox potential.
PB  - Federation of European Microbiological Societies (FEMS)
PB  - Serbian Society of Microbiology
C3  - Electronic Abstract Book - FEMS Conference on Microbiology in association with Serbian Society of Microbiology
T1  - Apple pectin as a potential prebiotic in infant nutrition
SP  - 781
EP  - 781
UR  - https://hdl.handle.net/21.15107/rcub_cer_6877
ER  - 

@conference{
author = "Lugonja, Nikoleta and Lončarević, Branka and Stanković, Dalibor and Lješević, Marija and Avdalović, Jelena and Spasić, Snežana and Beškoski, Vladimir",
year = "2022",
abstract = "The aim of this study was to research the influence of apple pectin in infant nutrition, its impact on selected bacteria of the infant’s gastrointestinal tract, gas production and total antioxidant capacity by electrochemical determination of changes in redox potential.",
publisher = "Federation of European Microbiological Societies (FEMS), Serbian Society of Microbiology",
journal = "Electronic Abstract Book - FEMS Conference on Microbiology in association with Serbian Society of Microbiology",
title = "Apple pectin as a potential prebiotic in infant nutrition",
pages = "781-781",
url = "https://hdl.handle.net/21.15107/rcub_cer_6877"
}

Lugonja, N., Lončarević, B., Stanković, D., Lješević, M., Avdalović, J., Spasić, S.,& Beškoski, V.. (2022). Apple pectin as a potential prebiotic in infant nutrition. in Electronic Abstract Book - FEMS Conference on Microbiology in association with Serbian Society of Microbiology
Federation of European Microbiological Societies (FEMS)., 781-781.
https://hdl.handle.net/21.15107/rcub_cer_6877

Lugonja N, Lončarević B, Stanković D, Lješević M, Avdalović J, Spasić S, Beškoski V. Apple pectin as a potential prebiotic in infant nutrition. in Electronic Abstract Book - FEMS Conference on Microbiology in association with Serbian Society of Microbiology. 2022;:781-781.
https://hdl.handle.net/21.15107/rcub_cer_6877 .

Lugonja, Nikoleta, Lončarević, Branka, Stanković, Dalibor, Lješević, Marija, Avdalović, Jelena, Spasić, Snežana, Beškoski, Vladimir, "Apple pectin as a potential prebiotic in infant nutrition" in Electronic Abstract Book - FEMS Conference on Microbiology in association with Serbian Society of Microbiology (2022):781-781,
https://hdl.handle.net/21.15107/rcub_cer_6877 .

TY  - CHAP
AU  - Savić, Slađana
AU  - Roglić, Goran
AU  - Dojčinović, Biljana
AU  - Manojlović, Dragan
AU  - Stanković, Dalibor
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5644
AB  - Environmental pollution requires a facile, sustainable, and adjustable approach for the processing. Most of the standard treatment procedures include high temperature and pressure, accompanied by expensive catalysts. Visible light improves decomposing systems of various contaminants from the hydrosphere and atmosphere. Graphitic carbon nitride (g-C3N4) dragged research interest in the degradation of diverse environmental contaminants, due to its photoactivity under the visible electromagnetic spectrum, production of oxidative species, and a range of relatively simple ways of synthesis. Nowadays, catalytic properties of g-C3N4 are enhanced by expanding surface area, widening of the bandgap, and by the development of doped or copolymer materials. Mechanisms of catalysis using different nanocomposites are given in detail, followed by the extent of degradation of dangerous chemicals. Considering all valuable evolutions of g-C3N4 as an important ingredient in the degeneration of diverse pollutants, here we provide a systematic overview of the nanostructured g-C3N4 used in solving environmental problems.
PB  - Elsevier
T2  - Advanced Materials for Sustainable Environmental Remediation: Terrestrial and Aquatic Environments
T1  - Chapter 20 - Graphitic carbon nitride: Triggering the solar light–assisted decomposition of hazardous substances
SP  - 533
EP  - 549
DO  - 10.1016/B978-0-323-90485-8.00007-2
ER  - 

@inbook{
author = "Savić, Slađana and Roglić, Goran and Dojčinović, Biljana and Manojlović, Dragan and Stanković, Dalibor",
year = "2022",
abstract = "Environmental pollution requires a facile, sustainable, and adjustable approach for the processing. Most of the standard treatment procedures include high temperature and pressure, accompanied by expensive catalysts. Visible light improves decomposing systems of various contaminants from the hydrosphere and atmosphere. Graphitic carbon nitride (g-C3N4) dragged research interest in the degradation of diverse environmental contaminants, due to its photoactivity under the visible electromagnetic spectrum, production of oxidative species, and a range of relatively simple ways of synthesis. Nowadays, catalytic properties of g-C3N4 are enhanced by expanding surface area, widening of the bandgap, and by the development of doped or copolymer materials. Mechanisms of catalysis using different nanocomposites are given in detail, followed by the extent of degradation of dangerous chemicals. Considering all valuable evolutions of g-C3N4 as an important ingredient in the degeneration of diverse pollutants, here we provide a systematic overview of the nanostructured g-C3N4 used in solving environmental problems.",
publisher = "Elsevier",
journal = "Advanced Materials for Sustainable Environmental Remediation: Terrestrial and Aquatic Environments",
booktitle = "Chapter 20 - Graphitic carbon nitride: Triggering the solar light–assisted decomposition of hazardous substances",
pages = "533-549",
doi = "10.1016/B978-0-323-90485-8.00007-2"
}

Savić, S., Roglić, G., Dojčinović, B., Manojlović, D.,& Stanković, D.. (2022). Chapter 20 - Graphitic carbon nitride: Triggering the solar light–assisted decomposition of hazardous substances. in Advanced Materials for Sustainable Environmental Remediation: Terrestrial and Aquatic Environments
Elsevier., 533-549.
https://doi.org/10.1016/B978-0-323-90485-8.00007-2

Savić S, Roglić G, Dojčinović B, Manojlović D, Stanković D. Chapter 20 - Graphitic carbon nitride: Triggering the solar light–assisted decomposition of hazardous substances. in Advanced Materials for Sustainable Environmental Remediation: Terrestrial and Aquatic Environments. 2022;:533-549.
doi:10.1016/B978-0-323-90485-8.00007-2 .

Savić, Slađana, Roglić, Goran, Dojčinović, Biljana, Manojlović, Dragan, Stanković, Dalibor, "Chapter 20 - Graphitic carbon nitride: Triggering the solar light–assisted decomposition of hazardous substances" in Advanced Materials for Sustainable Environmental Remediation: Terrestrial and Aquatic Environments (2022):533-549,
https://doi.org/10.1016/B978-0-323-90485-8.00007-2 . .

TY  - CONF
AU  - Jaćimović, Željko
AU  - Ognjanović, Miloš
AU  - Kosović-Perutović, Milica
AU  - Dojčinović, Biljana
AU  - Stanković, Dalibor
AU  - Antić, Bratislav
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7511
AB  - Nanoferrites have been intensively studied because of the possibility of their use in the fields such as medicine, sensors, environmental, agriculture, weather, battery, etc. Often, they are used as modal systems in fundamental science to study physical and chemical phenomena at the nanoscale. Various pathways were applied for the synthesis of nanoferrites with the same composition were led to different microstructure and structure properties, which further influenced magnetic, electric, catalytic and other properties. Consequently, with a controlled synthesis, it is possible to tune the properties of nanoferrites important for applications. On the other side, properties can be controlled by changing chemical composition. In ternary nanoferrites often deviation of stoichiometry accompanied with cation polyvalence was found [1]. The main idea of our work was the application of the polyol-modified method developed for the synthesis of flower-structured iron oxides nanoparticles in the preparation of ternary ZnxMnyFezO4 samples to seek a correlation among chemical composition and microstructure with magnetic hyperthermia efficiency and electrochemical properties. A series of the samples ZnxMnyFezO4 was prepared by polyol process using a slightly modified procedure described in ref [2]. By elemental analysis performed using the ICP technique, the content of cations in the formula unit was determined as follow: Zn0.640Fe2.360O4, Zn0.394Mn0.138Fe2.468O4, Zn0.309Mn0.240Fe2.451O4, Zn0.182Mn0.344Fe2.474O4, Zn0.098Mn0.447Fe2.455O4, Mn0.624Fe2.376O4. The ICP results pointed to the presence of multivalent cations, Mn2+/Mn3+ and Fe3+/Fe2+. Zn has stable valence +2, while the oxidation state of +4 for Mn couldn’t be excluded. Different oxidation states of Mn and Fe and possible deviation of stoichiometry, can create physical effects [3] and make ZnxMnyFezO4 suitable material in practical applications, used for modification of working electrodesin electrochemical sensors. Consequently, we have performed basic electrochemical characterisation of nanoferrites. Cyclic voltammetry of 5 mM K3[Fe(CN)]6/K4[Fe(CN)]6 (1:1) in 0.1 M KCl at bare SPCE and ZnxMnyFezO4-modified SPCE showed that the highest peak current (Ip) was achieved using a Zn0.098Mn0.447Fe2.455O4/SPCE. The Ip was about 22% higher than the bare electrode. X-ray diffraction pattern showed the samples were single-phase crystallising in spinel structure type. Morphology and particle size of the samples were analysed from TEM micrographs. Particles (or crystallites) were agglomerated in a flower-like structure (Figure 1). The diameter of the flowers was around 50-60 nm. Superparamagnetic behaviour of the samples was found from magnetization versus field measurements (hysteresis loops). Prepared samples were in the form of stable colloids with hydrodynamic diameter in the range of 50-120 nm. The heating properties of the samples were analysed from the data of specific absorption rate (SAR), Figure 1b. The highest SAR value was found for Zn0.098Mn0.447Fe2.455O4. The best heating efficiency and electrochemical properties had the same sample. To correlate ZnxMnyFezO4 different efficiency in magnetic hyperthermia and electrochemical sensor applications with parameters like cation distribution in two non-equivalent spinel crystallographic sites (space group, Fd-3m), local distortion on cationic sites, crystallite size and defects, an integrated study of samples structure and microstructure is in progress.
PB  - Sociedade Portuguesa de Química
C3  - ECC8 : 8th EuChemS Chemistry Congress : programme and the book of abstracts; Aug 28 - Sep 1, Lisbon, Portugal
T1  - Ternary flower-structured nanoferrites with polyvalent cations for potential applications in electrochemical sensors and magnetic hyperthermia
SP  - 850
EP  - 850
DO  - 10.52590/E.ECC8
ER  - 

@conference{
author = "Jaćimović, Željko and Ognjanović, Miloš and Kosović-Perutović, Milica and Dojčinović, Biljana and Stanković, Dalibor and Antić, Bratislav",
year = "2022",
abstract = "Nanoferrites have been intensively studied because of the possibility of their use in the fields such as medicine, sensors, environmental, agriculture, weather, battery, etc. Often, they are used as modal systems in fundamental science to study physical and chemical phenomena at the nanoscale. Various pathways were applied for the synthesis of nanoferrites with the same composition were led to different microstructure and structure properties, which further influenced magnetic, electric, catalytic and other properties. Consequently, with a controlled synthesis, it is possible to tune the properties of nanoferrites important for applications. On the other side, properties can be controlled by changing chemical composition. In ternary nanoferrites often deviation of stoichiometry accompanied with cation polyvalence was found [1]. The main idea of our work was the application of the polyol-modified method developed for the synthesis of flower-structured iron oxides nanoparticles in the preparation of ternary ZnxMnyFezO4 samples to seek a correlation among chemical composition and microstructure with magnetic hyperthermia efficiency and electrochemical properties. A series of the samples ZnxMnyFezO4 was prepared by polyol process using a slightly modified procedure described in ref [2]. By elemental analysis performed using the ICP technique, the content of cations in the formula unit was determined as follow: Zn0.640Fe2.360O4, Zn0.394Mn0.138Fe2.468O4, Zn0.309Mn0.240Fe2.451O4, Zn0.182Mn0.344Fe2.474O4, Zn0.098Mn0.447Fe2.455O4, Mn0.624Fe2.376O4. The ICP results pointed to the presence of multivalent cations, Mn2+/Mn3+ and Fe3+/Fe2+. Zn has stable valence +2, while the oxidation state of +4 for Mn couldn’t be excluded. Different oxidation states of Mn and Fe and possible deviation of stoichiometry, can create physical effects [3] and make ZnxMnyFezO4 suitable material in practical applications, used for modification of working electrodesin electrochemical sensors. Consequently, we have performed basic electrochemical characterisation of nanoferrites. Cyclic voltammetry of 5 mM K3[Fe(CN)]6/K4[Fe(CN)]6 (1:1) in 0.1 M KCl at bare SPCE and ZnxMnyFezO4-modified SPCE showed that the highest peak current (Ip) was achieved using a Zn0.098Mn0.447Fe2.455O4/SPCE. The Ip was about 22% higher than the bare electrode. X-ray diffraction pattern showed the samples were single-phase crystallising in spinel structure type. Morphology and particle size of the samples were analysed from TEM micrographs. Particles (or crystallites) were agglomerated in a flower-like structure (Figure 1). The diameter of the flowers was around 50-60 nm. Superparamagnetic behaviour of the samples was found from magnetization versus field measurements (hysteresis loops). Prepared samples were in the form of stable colloids with hydrodynamic diameter in the range of 50-120 nm. The heating properties of the samples were analysed from the data of specific absorption rate (SAR), Figure 1b. The highest SAR value was found for Zn0.098Mn0.447Fe2.455O4. The best heating efficiency and electrochemical properties had the same sample. To correlate ZnxMnyFezO4 different efficiency in magnetic hyperthermia and electrochemical sensor applications with parameters like cation distribution in two non-equivalent spinel crystallographic sites (space group, Fd-3m), local distortion on cationic sites, crystallite size and defects, an integrated study of samples structure and microstructure is in progress.",
publisher = "Sociedade Portuguesa de Química",
journal = "ECC8 : 8th EuChemS Chemistry Congress : programme and the book of abstracts; Aug 28 - Sep 1, Lisbon, Portugal",
title = "Ternary flower-structured nanoferrites with polyvalent cations for potential applications in electrochemical sensors and magnetic hyperthermia",
pages = "850-850",
doi = "10.52590/E.ECC8"
}

Jaćimović, Ž., Ognjanović, M., Kosović-Perutović, M., Dojčinović, B., Stanković, D.,& Antić, B.. (2022). Ternary flower-structured nanoferrites with polyvalent cations for potential applications in electrochemical sensors and magnetic hyperthermia. in ECC8 : 8th EuChemS Chemistry Congress : programme and the book of abstracts; Aug 28 - Sep 1, Lisbon, Portugal
Sociedade Portuguesa de Química., 850-850.
https://doi.org/10.52590/E.ECC8

Jaćimović Ž, Ognjanović M, Kosović-Perutović M, Dojčinović B, Stanković D, Antić B. Ternary flower-structured nanoferrites with polyvalent cations for potential applications in electrochemical sensors and magnetic hyperthermia. in ECC8 : 8th EuChemS Chemistry Congress : programme and the book of abstracts; Aug 28 - Sep 1, Lisbon, Portugal. 2022;:850-850.
doi:10.52590/E.ECC8 .

Jaćimović, Željko, Ognjanović, Miloš, Kosović-Perutović, Milica, Dojčinović, Biljana, Stanković, Dalibor, Antić, Bratislav, "Ternary flower-structured nanoferrites with polyvalent cations for potential applications in electrochemical sensors and magnetic hyperthermia" in ECC8 : 8th EuChemS Chemistry Congress : programme and the book of abstracts; Aug 28 - Sep 1, Lisbon, Portugal (2022):850-850,
https://doi.org/10.52590/E.ECC8 . .