TY  - JOUR
AU  - Kosić, Višnja
AU  - Božić, Nataša
AU  - Dojnov, Biljana
AU  - Banković, Predrag
AU  - Jović-Jovičić, Nataša
AU  - Knežević-Jugović, Zorica
AU  - Milutinović Nikolić, Aleksandra
PY  - 2024
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7525
AB  - Three glycoside hydrolases (α-amylase, xylanase and pullulanase) were immobilized on low-cost, environmentally friendly, easily modified clay rich in beidellite. Modifications included common procedures: Na-exchange, acid activation, pillaring, pillaring followed by acid activation, and organo-modifications with chitosan. Supports were characterized by chemical analysis, low temperature N2 physisorption, X-ray powder diffraction (XRPD) and Fourier-transform infrared (FT-IR) spectroscopy. The point of zero charge was also determined. Specific activity of different immobilizates of selected glycoside hydrolases was notably influenced by the type of chemical modification of supports. For each enzyme optimal support was chosen and storage stability was tested. α-Amylase immobilized on acid-activated support retained up to 95% of its initial specific activity of 105.6 ± 5.1 U g−1 after a testing period of 120 days. The most suitable support for xylanase was chitosan-modified beidellite with having specific activity of 90.0 ± 1.4 U g−1 which retained >50% its value after 120 days. Specific activity of pullulanase immobilized on pillared sample that was subsequently activated by acid was 44.5 ± 0.7 U g−1. Initial activity was preserved up to 33% for the same testing period. Comparing these results to the storage stability of the free enzymes that completely lost their activity for the longest period of 40 days, it can be concluded that appropriately modified beidellite- based clays could be used as suitable supports for stabilization of glycoside hydrolases. Nevertheless, further characterization of immobilizates (pH, thermal and operational stability) is needed in order to raise the suitability for larger scale processes in food industry.
PB  - Elsevier
T2  - Applied Clay Science
T1  - Significantly improved stabilization of glycoside hydrolases important in food industry by immobilization onto appropriately modified beidellite
VL  - 250
SP  - 107289
DO  - 10.1016/j.clay.2024.107289
ER  - 

@article{
author = "Kosić, Višnja and Božić, Nataša and Dojnov, Biljana and Banković, Predrag and Jović-Jovičić, Nataša and Knežević-Jugović, Zorica and Milutinović Nikolić, Aleksandra",
year = "2024",
abstract = "Three glycoside hydrolases (α-amylase, xylanase and pullulanase) were immobilized on low-cost, environmentally friendly, easily modified clay rich in beidellite. Modifications included common procedures: Na-exchange, acid activation, pillaring, pillaring followed by acid activation, and organo-modifications with chitosan. Supports were characterized by chemical analysis, low temperature N2 physisorption, X-ray powder diffraction (XRPD) and Fourier-transform infrared (FT-IR) spectroscopy. The point of zero charge was also determined. Specific activity of different immobilizates of selected glycoside hydrolases was notably influenced by the type of chemical modification of supports. For each enzyme optimal support was chosen and storage stability was tested. α-Amylase immobilized on acid-activated support retained up to 95% of its initial specific activity of 105.6 ± 5.1 U g−1 after a testing period of 120 days. The most suitable support for xylanase was chitosan-modified beidellite with having specific activity of 90.0 ± 1.4 U g−1 which retained >50% its value after 120 days. Specific activity of pullulanase immobilized on pillared sample that was subsequently activated by acid was 44.5 ± 0.7 U g−1. Initial activity was preserved up to 33% for the same testing period. Comparing these results to the storage stability of the free enzymes that completely lost their activity for the longest period of 40 days, it can be concluded that appropriately modified beidellite- based clays could be used as suitable supports for stabilization of glycoside hydrolases. Nevertheless, further characterization of immobilizates (pH, thermal and operational stability) is needed in order to raise the suitability for larger scale processes in food industry.",
publisher = "Elsevier",
journal = "Applied Clay Science",
title = "Significantly improved stabilization of glycoside hydrolases important in food industry by immobilization onto appropriately modified beidellite",
volume = "250",
pages = "107289",
doi = "10.1016/j.clay.2024.107289"
}

Kosić, V., Božić, N., Dojnov, B., Banković, P., Jović-Jovičić, N., Knežević-Jugović, Z.,& Milutinović Nikolić, A.. (2024). Significantly improved stabilization of glycoside hydrolases important in food industry by immobilization onto appropriately modified beidellite. in Applied Clay Science
Elsevier., 250, 107289.
https://doi.org/10.1016/j.clay.2024.107289

Kosić V, Božić N, Dojnov B, Banković P, Jović-Jovičić N, Knežević-Jugović Z, Milutinović Nikolić A. Significantly improved stabilization of glycoside hydrolases important in food industry by immobilization onto appropriately modified beidellite. in Applied Clay Science. 2024;250:107289.
doi:10.1016/j.clay.2024.107289 .

Kosić, Višnja, Božić, Nataša, Dojnov, Biljana, Banković, Predrag, Jović-Jovičić, Nataša, Knežević-Jugović, Zorica, Milutinović Nikolić, Aleksandra, "Significantly improved stabilization of glycoside hydrolases important in food industry by immobilization onto appropriately modified beidellite" in Applied Clay Science, 250 (2024):107289,
https://doi.org/10.1016/j.clay.2024.107289 . .

TY  - JOUR
AU  - Stevanović, Gordana
AU  - Jović-Jovičić, Nataša
AU  - Popović, Aleksandar
AU  - Dojčinović, Biljana
AU  - Milutinović Nikolić, Aleksandra
AU  - Banković, Predrag
AU  - Ajduković, Marija
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6902
AB  - Catalytic degradation of tartrazine in the presence of Oxone® activated by a catalyst constituted of cobalt supported on a nanocomposite of smectite with chitosan-derived carbon was investigated. The catalyst was synthesized using cobalt impregnation followed by carbonization at 773 K in an inert atmosphere. The synthesized catalyst was previously fully characterized using appropriate characterization methods, including XRPD, XPS, FTIR, HR-TEM, and low-temperature N2-physisorption analysis. The catalytic experiments were performed by varying different experimental parameters (dye concentration, Oxone® concentration, temperature, and initial pH of the reaction solution). The kinetic and thermodynamic parameters were estimated from the experimental results. The kinetics data showed the best fit with the pseudo-first-order kinetics model. The activation energy of the investigated degradation process was calculated according to the Arrhenius equation. The catalyst showed excellent performance at low temperatures even at 298 K, and in the wide range of pH values.
PB  - Serbian Ceramic Society
T2  - Science of Sintering
T1  - Co supported chitosan-derived carbon-smectite catalyst in Oxone® induced at dye degradation
DO  - 10.2298/SOS230427037S
ER  - 

@article{
author = "Stevanović, Gordana and Jović-Jovičić, Nataša and Popović, Aleksandar and Dojčinović, Biljana and Milutinović Nikolić, Aleksandra and Banković, Predrag and Ajduković, Marija",
year = "2023",
abstract = "Catalytic degradation of tartrazine in the presence of Oxone® activated by a catalyst constituted of cobalt supported on a nanocomposite of smectite with chitosan-derived carbon was investigated. The catalyst was synthesized using cobalt impregnation followed by carbonization at 773 K in an inert atmosphere. The synthesized catalyst was previously fully characterized using appropriate characterization methods, including XRPD, XPS, FTIR, HR-TEM, and low-temperature N2-physisorption analysis. The catalytic experiments were performed by varying different experimental parameters (dye concentration, Oxone® concentration, temperature, and initial pH of the reaction solution). The kinetic and thermodynamic parameters were estimated from the experimental results. The kinetics data showed the best fit with the pseudo-first-order kinetics model. The activation energy of the investigated degradation process was calculated according to the Arrhenius equation. The catalyst showed excellent performance at low temperatures even at 298 K, and in the wide range of pH values.",
publisher = "Serbian Ceramic Society",
journal = "Science of Sintering",
title = "Co supported chitosan-derived carbon-smectite catalyst in Oxone® induced at dye degradation",
doi = "10.2298/SOS230427037S"
}

Stevanović, G., Jović-Jovičić, N., Popović, A., Dojčinović, B., Milutinović Nikolić, A., Banković, P.,& Ajduković, M.. (2023). Co supported chitosan-derived carbon-smectite catalyst in Oxone® induced at dye degradation. in Science of Sintering
Serbian Ceramic Society..
https://doi.org/10.2298/SOS230427037S

Stevanović G, Jović-Jovičić N, Popović A, Dojčinović B, Milutinović Nikolić A, Banković P, Ajduković M. Co supported chitosan-derived carbon-smectite catalyst in Oxone® induced at dye degradation. in Science of Sintering. 2023;.
doi:10.2298/SOS230427037S .

Stevanović, Gordana, Jović-Jovičić, Nataša, Popović, Aleksandar, Dojčinović, Biljana, Milutinović Nikolić, Aleksandra, Banković, Predrag, Ajduković, Marija, "Co supported chitosan-derived carbon-smectite catalyst in Oxone® induced at dye degradation" in Science of Sintering (2023),
https://doi.org/10.2298/SOS230427037S . .

TY  - JOUR
AU  - Janjić, Goran
AU  - Marinović, Sanja
AU  - Jadranin, Milka
AU  - Ajduković, Marija
AU  - Đorđević, Ivana
AU  - Petkovic-Benazzouz, Marija
AU  - Milutinović Nikolić, Aleksandra
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6693
AB  - The catalytic degradation of hazardous organic contaminants in industrial wastewater is a promising technology. Reactions of tartrazine, the synthetic yellow azo dye, with Oxone® in the presence of catalyst in strong acidic condition (pH 2), were detected by using UV–Vis spectroscopy. In order to extend the applicability profile of Co-supported Al-pillared montmorillonite catalyst an investigation of Oxone® induced reactions were performed in extreme acidic environment. The products of the reactions were identified by liquid chromatography–mass spectrometry (LC-MS). Along with the catalytic decomposition of tartrazine induced by radical attack (confirmed as unique reaction path under neutral and alkaline conditions), the formation of tartrazine derivatives by reaction of nucleophilic addition was also detected. The presence of derivatives under acidic conditions slowed down the hydrolysis of tartrazine diazo bond in comparison to the reactions in neutral environment. Nevertheless, the reaction in acidic conditions (pH 2) is faster than the one conducted in alkaline conditions (pH 11). Theoretical calculations were used to complete and clarify the mechanisms of tartrazine derivatization and degradation, as well as to predict the UV–Vis spectra of compounds which could serve as predictors of certain reaction phases. ECOSAR program, used to estimate toxicological profile of compounds to aquatic animals, indicated an increase in the harmfulness of the compounds identified by LC-MS as degradation products from the reaction conducted for 240min. It could be concluded that an intensification of the process parameters (higher concentration of Oxone®, higher catalyst loading, increased reaction time, etc.) is needed in order to obtain only biodegradable products.
PB  - Elsevier
T2  - Environmental Pollution
T1  - Degradation of tartrazine by Oxone® in the presence of cobalt based catalyst supported on pillared montmorillonite - Efficient technology even in extreme conditions
VL  - 331
SP  - 121863
DO  - 10.1016/j.envpol.2023.121863
ER  - 

@article{
author = "Janjić, Goran and Marinović, Sanja and Jadranin, Milka and Ajduković, Marija and Đorđević, Ivana and Petkovic-Benazzouz, Marija and Milutinović Nikolić, Aleksandra",
year = "2023",
abstract = "The catalytic degradation of hazardous organic contaminants in industrial wastewater is a promising technology. Reactions of tartrazine, the synthetic yellow azo dye, with Oxone® in the presence of catalyst in strong acidic condition (pH 2), were detected by using UV–Vis spectroscopy. In order to extend the applicability profile of Co-supported Al-pillared montmorillonite catalyst an investigation of Oxone® induced reactions were performed in extreme acidic environment. The products of the reactions were identified by liquid chromatography–mass spectrometry (LC-MS). Along with the catalytic decomposition of tartrazine induced by radical attack (confirmed as unique reaction path under neutral and alkaline conditions), the formation of tartrazine derivatives by reaction of nucleophilic addition was also detected. The presence of derivatives under acidic conditions slowed down the hydrolysis of tartrazine diazo bond in comparison to the reactions in neutral environment. Nevertheless, the reaction in acidic conditions (pH 2) is faster than the one conducted in alkaline conditions (pH 11). Theoretical calculations were used to complete and clarify the mechanisms of tartrazine derivatization and degradation, as well as to predict the UV–Vis spectra of compounds which could serve as predictors of certain reaction phases. ECOSAR program, used to estimate toxicological profile of compounds to aquatic animals, indicated an increase in the harmfulness of the compounds identified by LC-MS as degradation products from the reaction conducted for 240min. It could be concluded that an intensification of the process parameters (higher concentration of Oxone®, higher catalyst loading, increased reaction time, etc.) is needed in order to obtain only biodegradable products.",
publisher = "Elsevier",
journal = "Environmental Pollution",
title = "Degradation of tartrazine by Oxone® in the presence of cobalt based catalyst supported on pillared montmorillonite - Efficient technology even in extreme conditions",
volume = "331",
pages = "121863",
doi = "10.1016/j.envpol.2023.121863"
}

Janjić, G., Marinović, S., Jadranin, M., Ajduković, M., Đorđević, I., Petkovic-Benazzouz, M.,& Milutinović Nikolić, A.. (2023). Degradation of tartrazine by Oxone® in the presence of cobalt based catalyst supported on pillared montmorillonite - Efficient technology even in extreme conditions. in Environmental Pollution
Elsevier., 331, 121863.
https://doi.org/10.1016/j.envpol.2023.121863

Janjić G, Marinović S, Jadranin M, Ajduković M, Đorđević I, Petkovic-Benazzouz M, Milutinović Nikolić A. Degradation of tartrazine by Oxone® in the presence of cobalt based catalyst supported on pillared montmorillonite - Efficient technology even in extreme conditions. in Environmental Pollution. 2023;331:121863.
doi:10.1016/j.envpol.2023.121863 .

Janjić, Goran, Marinović, Sanja, Jadranin, Milka, Ajduković, Marija, Đorđević, Ivana, Petkovic-Benazzouz, Marija, Milutinović Nikolić, Aleksandra, "Degradation of tartrazine by Oxone® in the presence of cobalt based catalyst supported on pillared montmorillonite - Efficient technology even in extreme conditions" in Environmental Pollution, 331 (2023):121863,
https://doi.org/10.1016/j.envpol.2023.121863 . .

TY  - CONF
AU  - Maksimović, Jelena
AU  - Pagnacco, Maja
AU  - Ajduković, Marija
AU  - Stevanović, Gordana
AU  - Banković, Predrag
AU  - Milutinović Nikolić, Aleksandra
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6748
AB  - The Briggs-Rauscher oscillatory reaction, which represents the oxidation of malonic acid in 
the presence of hydrogen peroxide and potassium iodate catalyzed by manganese ion in an 
acidic environment, proved to be extremely sensitive for testing insoluble materials, such as 
bronzes and clays. It was shown that origin of bentonite has high impact on the length of the 
oscillation time. In this work, the influence of different sizes of bentonite particles from the 
Bogovina deposit on the Briggs-Rauscer oscillatory reaction in the conditions of a closed 
reactor was investigated. Five particle sizes of bentonite, (< 25 µm, < 50 µm, < 75 µm, < 150 
µm and < 300 µm) having identical mass of 0.15 g, were tested. The addition of different 
particle sizes of Bogovina clay does not significantly influence the basic BR oscillogram.
PB  - Serbian Ceramic Society
C3  - Program and book of abstracts - Serbian Ceramics Society Conference - Advanced Ceramics and Application XI, New Frontiers in Multifunctional Material Science and Processing,18-20 th September 2023. Belgrade, Serbia
T1  - The effect of different particle sizes of bentonite from the Bogovina deposit on the Briggs-Rauscher oscillatory reaction
SP  - 71
EP  - 72
UR  - https://hdl.handle.net/21.15107/rcub_cer_6748
ER  - 

@conference{
author = "Maksimović, Jelena and Pagnacco, Maja and Ajduković, Marija and Stevanović, Gordana and Banković, Predrag and Milutinović Nikolić, Aleksandra",
year = "2023",
abstract = "The Briggs-Rauscher oscillatory reaction, which represents the oxidation of malonic acid in 
the presence of hydrogen peroxide and potassium iodate catalyzed by manganese ion in an 
acidic environment, proved to be extremely sensitive for testing insoluble materials, such as 
bronzes and clays. It was shown that origin of bentonite has high impact on the length of the 
oscillation time. In this work, the influence of different sizes of bentonite particles from the 
Bogovina deposit on the Briggs-Rauscer oscillatory reaction in the conditions of a closed 
reactor was investigated. Five particle sizes of bentonite, (< 25 µm, < 50 µm, < 75 µm, < 150 
µm and < 300 µm) having identical mass of 0.15 g, were tested. The addition of different 
particle sizes of Bogovina clay does not significantly influence the basic BR oscillogram.",
publisher = "Serbian Ceramic Society",
journal = "Program and book of abstracts - Serbian Ceramics Society Conference - Advanced Ceramics and Application XI, New Frontiers in Multifunctional Material Science and Processing,18-20 th September 2023. Belgrade, Serbia",
title = "The effect of different particle sizes of bentonite from the Bogovina deposit on the Briggs-Rauscher oscillatory reaction",
pages = "71-72",
url = "https://hdl.handle.net/21.15107/rcub_cer_6748"
}

Maksimović, J., Pagnacco, M., Ajduković, M., Stevanović, G., Banković, P.,& Milutinović Nikolić, A.. (2023). The effect of different particle sizes of bentonite from the Bogovina deposit on the Briggs-Rauscher oscillatory reaction. in Program and book of abstracts - Serbian Ceramics Society Conference - Advanced Ceramics and Application XI, New Frontiers in Multifunctional Material Science and Processing,18-20 th September 2023. Belgrade, Serbia
Serbian Ceramic Society., 71-72.
https://hdl.handle.net/21.15107/rcub_cer_6748

Maksimović J, Pagnacco M, Ajduković M, Stevanović G, Banković P, Milutinović Nikolić A. The effect of different particle sizes of bentonite from the Bogovina deposit on the Briggs-Rauscher oscillatory reaction. in Program and book of abstracts - Serbian Ceramics Society Conference - Advanced Ceramics and Application XI, New Frontiers in Multifunctional Material Science and Processing,18-20 th September 2023. Belgrade, Serbia. 2023;:71-72.
https://hdl.handle.net/21.15107/rcub_cer_6748 .

Maksimović, Jelena, Pagnacco, Maja, Ajduković, Marija, Stevanović, Gordana, Banković, Predrag, Milutinović Nikolić, Aleksandra, "The effect of different particle sizes of bentonite from the Bogovina deposit on the Briggs-Rauscher oscillatory reaction" in Program and book of abstracts - Serbian Ceramics Society Conference - Advanced Ceramics and Application XI, New Frontiers in Multifunctional Material Science and Processing,18-20 th September 2023. Belgrade, Serbia (2023):71-72,
https://hdl.handle.net/21.15107/rcub_cer_6748 .

TY  - CONF
AU  - Kosić, Višnja
AU  - Božić, Nataša
AU  - Dojnov, Biljana
AU  - Stevanović, Gordana
AU  - Banković, Predrag
AU  - Milutinović Nikolić, Aleksandra
AU  - Knežević-Jugović, Zorica
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6846
AB  - Clays are naturally occurring, environmentally friendly, chemically inert, thermostable, inexpensive resources that are easily modified into materials with tailored properties. As such, they can be used as suitable supports for enzyme immobilization and application in the food industry. Natural polysaccharides starch, xylan, pullulan, and its derivatives obtained by the action of enzymes, have numerous potentials for food industrial applications. In this work the enzyme supports were prepared from bentonite from Coal mine "Bogovina", Serbia by acid activation (AA), pillaring (P), and pillaring followed by acid activation (PAA). The characterization of the obtained materials included chemical and phase composition, surface acidity, and textural properties. After characterization, -amylase from Bacillus paralicheniformis (BliAmy), commercial xylanase from Sigma-Aldrich (Xyl), and pullulanase from B. paralicheniformis (BliPull) were immobilized on bentonite based supports by 24 h adsorption at 25 °C. The obtained biocatalysts BliAmy-AA (106 IU/g), Xyl-P (74 IU/g), and BliPull-PAA (45 IU/g) showed very good storage stability with the activity preserved after 4 weeks of testing. Products of hydrolysis were detected by TLC and indicate a promising application in the food industry.
PB  - Belgrade : Serbian Chemical Society
C3  - Abstract Book - XXII Congress EuroFoodChem, June 14-16, 2023, Belgrade, Serbia, 2023, 210-210
T1  - Stable, environmentally friendly and inexpensive biocatalysts for obtaining important ingredients applicable in the food industry
SP  - 210
EP  - 210
UR  - https://hdl.handle.net/21.15107/rcub_cer_6846
ER  - 

@conference{
author = "Kosić, Višnja and Božić, Nataša and Dojnov, Biljana and Stevanović, Gordana and Banković, Predrag and Milutinović Nikolić, Aleksandra and Knežević-Jugović, Zorica",
year = "2023",
abstract = "Clays are naturally occurring, environmentally friendly, chemically inert, thermostable, inexpensive resources that are easily modified into materials with tailored properties. As such, they can be used as suitable supports for enzyme immobilization and application in the food industry. Natural polysaccharides starch, xylan, pullulan, and its derivatives obtained by the action of enzymes, have numerous potentials for food industrial applications. In this work the enzyme supports were prepared from bentonite from Coal mine "Bogovina", Serbia by acid activation (AA), pillaring (P), and pillaring followed by acid activation (PAA). The characterization of the obtained materials included chemical and phase composition, surface acidity, and textural properties. After characterization, -amylase from Bacillus paralicheniformis (BliAmy), commercial xylanase from Sigma-Aldrich (Xyl), and pullulanase from B. paralicheniformis (BliPull) were immobilized on bentonite based supports by 24 h adsorption at 25 °C. The obtained biocatalysts BliAmy-AA (106 IU/g), Xyl-P (74 IU/g), and BliPull-PAA (45 IU/g) showed very good storage stability with the activity preserved after 4 weeks of testing. Products of hydrolysis were detected by TLC and indicate a promising application in the food industry.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "Abstract Book - XXII Congress EuroFoodChem, June 14-16, 2023, Belgrade, Serbia, 2023, 210-210",
title = "Stable, environmentally friendly and inexpensive biocatalysts for obtaining important ingredients applicable in the food industry",
pages = "210-210",
url = "https://hdl.handle.net/21.15107/rcub_cer_6846"
}

Kosić, V., Božić, N., Dojnov, B., Stevanović, G., Banković, P., Milutinović Nikolić, A.,& Knežević-Jugović, Z.. (2023). Stable, environmentally friendly and inexpensive biocatalysts for obtaining important ingredients applicable in the food industry. in Abstract Book - XXII Congress EuroFoodChem, June 14-16, 2023, Belgrade, Serbia, 2023, 210-210
Belgrade : Serbian Chemical Society., 210-210.
https://hdl.handle.net/21.15107/rcub_cer_6846

Kosić V, Božić N, Dojnov B, Stevanović G, Banković P, Milutinović Nikolić A, Knežević-Jugović Z. Stable, environmentally friendly and inexpensive biocatalysts for obtaining important ingredients applicable in the food industry. in Abstract Book - XXII Congress EuroFoodChem, June 14-16, 2023, Belgrade, Serbia, 2023, 210-210. 2023;:210-210.
https://hdl.handle.net/21.15107/rcub_cer_6846 .

Kosić, Višnja, Božić, Nataša, Dojnov, Biljana, Stevanović, Gordana, Banković, Predrag, Milutinović Nikolić, Aleksandra, Knežević-Jugović, Zorica, "Stable, environmentally friendly and inexpensive biocatalysts for obtaining important ingredients applicable in the food industry" in Abstract Book - XXII Congress EuroFoodChem, June 14-16, 2023, Belgrade, Serbia, 2023, 210-210 (2023):210-210,
https://hdl.handle.net/21.15107/rcub_cer_6846 .

TY  - CONF
AU  - Kosić, Višnja
AU  - Božić, Nataša
AU  - Dojnov, Biljana
AU  - Stevanović, Gordana
AU  - Milutinović Nikolić, Aleksandra
AU  - Knežević-Jugović, Zorica
AU  - Banković, Predrag
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6030
AB  - Some coal mines suffer from problem of having huge deposits of bentonite that they regard as undesirable, since bentonite can cause problem due to its swelling property. Instead of piling stacks of bentonite and regarding it as ecological problem the bentonite can be used as enzyme support by immobilization of enzymes as the challenging new application in the field of biotechnology. The enzyme catalysts in the industrial application present lower energy costs and are more environmentally friendly in comparison to traditional chemical processes. The advantages of enzymes are even more prominent when enzymes are applied in immobilized form. In this work the enzyme supports were prepared from bentonite from Coal mine "Bogovina", Serbia where bentonite, although valuable resource, is still considered to be tailings. Bentonite was modified by common methods: acid activation (AA), pillaring (P), and pillaring followed by acid activation (PAA) and tested as enzyme support. All the obtained materials were characterized by the X-ray powder diffraction and FTIR spectroscopy. The amylase, xylanase, and pullulanase were immobilized on different bentonite based supports by 24 h adsorption at 25 °C. The experimental results revealed that under the investigated conditions AA, P, and PAA, were the most suitable for amylase (106 IU/g), xylanase (74 IU/g), and pullulanase (45 IU/g) immobilization, respectively.
PB  - European Federation of Biotechnology
C3  - Programme and abstract book - Biotechnology for a circular bioeconomy: carbon capture, waste recycling and mitigation of global warming, 28-29 March 2023, online
T1  - The tailings from coal mine instead of waste became applicable as enzyme supports
SP  - 65
EP  - 65
UR  - https://hdl.handle.net/21.15107/rcub_cer_6030
ER  - 

@conference{
author = "Kosić, Višnja and Božić, Nataša and Dojnov, Biljana and Stevanović, Gordana and Milutinović Nikolić, Aleksandra and Knežević-Jugović, Zorica and Banković, Predrag",
year = "2023",
abstract = "Some coal mines suffer from problem of having huge deposits of bentonite that they regard as undesirable, since bentonite can cause problem due to its swelling property. Instead of piling stacks of bentonite and regarding it as ecological problem the bentonite can be used as enzyme support by immobilization of enzymes as the challenging new application in the field of biotechnology. The enzyme catalysts in the industrial application present lower energy costs and are more environmentally friendly in comparison to traditional chemical processes. The advantages of enzymes are even more prominent when enzymes are applied in immobilized form. In this work the enzyme supports were prepared from bentonite from Coal mine "Bogovina", Serbia where bentonite, although valuable resource, is still considered to be tailings. Bentonite was modified by common methods: acid activation (AA), pillaring (P), and pillaring followed by acid activation (PAA) and tested as enzyme support. All the obtained materials were characterized by the X-ray powder diffraction and FTIR spectroscopy. The amylase, xylanase, and pullulanase were immobilized on different bentonite based supports by 24 h adsorption at 25 °C. The experimental results revealed that under the investigated conditions AA, P, and PAA, were the most suitable for amylase (106 IU/g), xylanase (74 IU/g), and pullulanase (45 IU/g) immobilization, respectively.",
publisher = "European Federation of Biotechnology",
journal = "Programme and abstract book - Biotechnology for a circular bioeconomy: carbon capture, waste recycling and mitigation of global warming, 28-29 March 2023, online",
title = "The tailings from coal mine instead of waste became applicable as enzyme supports",
pages = "65-65",
url = "https://hdl.handle.net/21.15107/rcub_cer_6030"
}

Kosić, V., Božić, N., Dojnov, B., Stevanović, G., Milutinović Nikolić, A., Knežević-Jugović, Z.,& Banković, P.. (2023). The tailings from coal mine instead of waste became applicable as enzyme supports. in Programme and abstract book - Biotechnology for a circular bioeconomy: carbon capture, waste recycling and mitigation of global warming, 28-29 March 2023, online
European Federation of Biotechnology., 65-65.
https://hdl.handle.net/21.15107/rcub_cer_6030

Kosić V, Božić N, Dojnov B, Stevanović G, Milutinović Nikolić A, Knežević-Jugović Z, Banković P. The tailings from coal mine instead of waste became applicable as enzyme supports. in Programme and abstract book - Biotechnology for a circular bioeconomy: carbon capture, waste recycling and mitigation of global warming, 28-29 March 2023, online. 2023;:65-65.
https://hdl.handle.net/21.15107/rcub_cer_6030 .

Kosić, Višnja, Božić, Nataša, Dojnov, Biljana, Stevanović, Gordana, Milutinović Nikolić, Aleksandra, Knežević-Jugović, Zorica, Banković, Predrag, "The tailings from coal mine instead of waste became applicable as enzyme supports" in Programme and abstract book - Biotechnology for a circular bioeconomy: carbon capture, waste recycling and mitigation of global warming, 28-29 March 2023, online (2023):65-65,
https://hdl.handle.net/21.15107/rcub_cer_6030 .

TY  - CONF
AU  - Stevanović, Gordana
AU  - Jović-Jovičić, Nataša
AU  - Krstić, Jugoslav
AU  - Marinović, Sanja
AU  - Milutinović Nikolić, Aleksandra
AU  - Banković, Predrag
AU  - Ajduković, Marija
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6436
AB  - Catalytic degradation of tartrazine in the presence of Oxone®

was investigated. Oxone was activated by
nanocomposite catalysts consisted of cobalt supported on smectite with chitosan-derived carbon loading. The
catalyst was synthetized using an impregnation-carbonization procedure and NaHCO3 was used as green
porogen. Smectite rich bentonite clay from Bogovina, Serbia was used as started material. After milling,
sieving and hydroseparation the fractions containing particles up to 2 μm in diameter were separated (denoted
as S). The intercalation of chitosan into the smectite was performed according to the previously described
procedure [1]. Obtained chitosan-smectite nanocomposite (Ch-S) was submitted to the wetness impregnation
method by Co2+ ions [1]. The impregnation was performed by slow addition of Co(NO3)2 solution to Ch-S
powder resulting in 0.03 g Co2+ per 1 g of Ch-S. After drying, the sample was mixed with NaHCO3 in a mass
ratio 1:3, placed in a tube furnace and carbonized in a stream of N2 at 500°C for 1 h. The potassium
peroxymonosulfate (Oxone®

, i.e. 2KHSO5∙KHSO4∙K2SO4) was used as a source of sulfate radicals generated by
cobalt from the catalysts. The catalytic activity of the N/Co/cCh-S was compared with catalyst Co/cCh-S
obtained by the same synthesis procedure without activation by NaHCO3. The degradation of tartrazine was
monitored using UV–Vis spectrophotometry at wavelength of 426 nm within 60 minutes. It was found that
N/Co/cCh-S reached 100% of dye degradation after 30 minutes, while degradation in the presence of Co/cCh-S
was 77% for the same reaction time. The results of the catalytic tests were fitted by different kinetic models and
the first-order-kinetic model showed the best correlation. The first-order constant (k1) values for N/Co/cCh-S
and Co/cCh-S were 0.1286 min-1 and 0.0561 min-1, respectively. The results of this study confirmed that the
presence of NaHCO3 in the catalyst synthesis led to increased catalyst activity and accelerated tartrazine
degradation in the presence of Oxone®.
PB  - Bari, Italy : Digilabs
C3  - Scientific Research Abstracts - International Conference of European Clay Groups Association - EUROCLAY 2023, 24-27 July 2023, Bari, Italy
T1  - Cobalt-carbon-smectite catalysts in Oxone® induced oxidative degradation of tartrazine: The role of the NaHCO3 in the synthesis of the catalyst
VL  - 14
SP  - 279
EP  - 279
UR  - https://hdl.handle.net/21.15107/rcub_cer_6436
ER  - 

@conference{
author = "Stevanović, Gordana and Jović-Jovičić, Nataša and Krstić, Jugoslav and Marinović, Sanja and Milutinović Nikolić, Aleksandra and Banković, Predrag and Ajduković, Marija",
year = "2023",
abstract = "Catalytic degradation of tartrazine in the presence of Oxone®

was investigated. Oxone was activated by
nanocomposite catalysts consisted of cobalt supported on smectite with chitosan-derived carbon loading. The
catalyst was synthetized using an impregnation-carbonization procedure and NaHCO3 was used as green
porogen. Smectite rich bentonite clay from Bogovina, Serbia was used as started material. After milling,
sieving and hydroseparation the fractions containing particles up to 2 μm in diameter were separated (denoted
as S). The intercalation of chitosan into the smectite was performed according to the previously described
procedure [1]. Obtained chitosan-smectite nanocomposite (Ch-S) was submitted to the wetness impregnation
method by Co2+ ions [1]. The impregnation was performed by slow addition of Co(NO3)2 solution to Ch-S
powder resulting in 0.03 g Co2+ per 1 g of Ch-S. After drying, the sample was mixed with NaHCO3 in a mass
ratio 1:3, placed in a tube furnace and carbonized in a stream of N2 at 500°C for 1 h. The potassium
peroxymonosulfate (Oxone®

, i.e. 2KHSO5∙KHSO4∙K2SO4) was used as a source of sulfate radicals generated by
cobalt from the catalysts. The catalytic activity of the N/Co/cCh-S was compared with catalyst Co/cCh-S
obtained by the same synthesis procedure without activation by NaHCO3. The degradation of tartrazine was
monitored using UV–Vis spectrophotometry at wavelength of 426 nm within 60 minutes. It was found that
N/Co/cCh-S reached 100% of dye degradation after 30 minutes, while degradation in the presence of Co/cCh-S
was 77% for the same reaction time. The results of the catalytic tests were fitted by different kinetic models and
the first-order-kinetic model showed the best correlation. The first-order constant (k1) values for N/Co/cCh-S
and Co/cCh-S were 0.1286 min-1 and 0.0561 min-1, respectively. The results of this study confirmed that the
presence of NaHCO3 in the catalyst synthesis led to increased catalyst activity and accelerated tartrazine
degradation in the presence of Oxone®.",
publisher = "Bari, Italy : Digilabs",
journal = "Scientific Research Abstracts - International Conference of European Clay Groups Association - EUROCLAY 2023, 24-27 July 2023, Bari, Italy",
title = "Cobalt-carbon-smectite catalysts in Oxone® induced oxidative degradation of tartrazine: The role of the NaHCO3 in the synthesis of the catalyst",
volume = "14",
pages = "279-279",
url = "https://hdl.handle.net/21.15107/rcub_cer_6436"
}

Stevanović, G., Jović-Jovičić, N., Krstić, J., Marinović, S., Milutinović Nikolić, A., Banković, P.,& Ajduković, M.. (2023). Cobalt-carbon-smectite catalysts in Oxone® induced oxidative degradation of tartrazine: The role of the NaHCO3 in the synthesis of the catalyst. in Scientific Research Abstracts - International Conference of European Clay Groups Association - EUROCLAY 2023, 24-27 July 2023, Bari, Italy
Bari, Italy : Digilabs., 14, 279-279.
https://hdl.handle.net/21.15107/rcub_cer_6436

Stevanović G, Jović-Jovičić N, Krstić J, Marinović S, Milutinović Nikolić A, Banković P, Ajduković M. Cobalt-carbon-smectite catalysts in Oxone® induced oxidative degradation of tartrazine: The role of the NaHCO3 in the synthesis of the catalyst. in Scientific Research Abstracts - International Conference of European Clay Groups Association - EUROCLAY 2023, 24-27 July 2023, Bari, Italy. 2023;14:279-279.
https://hdl.handle.net/21.15107/rcub_cer_6436 .

Stevanović, Gordana, Jović-Jovičić, Nataša, Krstić, Jugoslav, Marinović, Sanja, Milutinović Nikolić, Aleksandra, Banković, Predrag, Ajduković, Marija, "Cobalt-carbon-smectite catalysts in Oxone® induced oxidative degradation of tartrazine: The role of the NaHCO3 in the synthesis of the catalyst" in Scientific Research Abstracts - International Conference of European Clay Groups Association - EUROCLAY 2023, 24-27 July 2023, Bari, Italy, 14 (2023):279-279,
https://hdl.handle.net/21.15107/rcub_cer_6436 .

TY  - CONF
AU  - Jović-Jovičić, Nataša
AU  - Ilić, Irena
AU  - Ajduković, Marija
AU  - Milutinović Nikolić, Aleksandra
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6685
AB  - Acid activated montmorillonite was impregnated with Co2+ ions, calcined at 450 , and used as 
catalyst for Oxone® activation in catalytic oxidative degradation of nicotine. Catalytic tests were 
performed in temperature range from 30 °C to 60 °C in order to obtain kinetic data. Kinetic study at 
different temperatures showed that catalytic degradation of nicotine corresponded to the first-order 
kinetic model. The activation energy of the investigated degradation process was determined by 
applying Arrhenius equation.
PB  - Society of Physical Chemists of Serbia
C3  - Proceedings - 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2022, September, 26-30, 2022, Belgrade, Serbia
T1  - Kinetic and thermodynamic study of nicotine degradation by oxone® activated by cobalt based catalyst
VL  - I
SP  - 149
EP  - 152
UR  - https://hdl.handle.net/21.15107/rcub_cer_6685
ER  - 

@conference{
author = "Jović-Jovičić, Nataša and Ilić, Irena and Ajduković, Marija and Milutinović Nikolić, Aleksandra",
year = "2022",
abstract = "Acid activated montmorillonite was impregnated with Co2+ ions, calcined at 450 , and used as 
catalyst for Oxone® activation in catalytic oxidative degradation of nicotine. Catalytic tests were 
performed in temperature range from 30 °C to 60 °C in order to obtain kinetic data. Kinetic study at 
different temperatures showed that catalytic degradation of nicotine corresponded to the first-order 
kinetic model. The activation energy of the investigated degradation process was determined by 
applying Arrhenius equation.",
publisher = "Society of Physical Chemists of Serbia",
journal = "Proceedings - 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2022, September, 26-30, 2022, Belgrade, Serbia",
title = "Kinetic and thermodynamic study of nicotine degradation by oxone® activated by cobalt based catalyst",
volume = "I",
pages = "149-152",
url = "https://hdl.handle.net/21.15107/rcub_cer_6685"
}

Jović-Jovičić, N., Ilić, I., Ajduković, M.,& Milutinović Nikolić, A.. (2022). Kinetic and thermodynamic study of nicotine degradation by oxone® activated by cobalt based catalyst. in Proceedings - 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2022, September, 26-30, 2022, Belgrade, Serbia
Society of Physical Chemists of Serbia., I, 149-152.
https://hdl.handle.net/21.15107/rcub_cer_6685

Jović-Jovičić N, Ilić I, Ajduković M, Milutinović Nikolić A. Kinetic and thermodynamic study of nicotine degradation by oxone® activated by cobalt based catalyst. in Proceedings - 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2022, September, 26-30, 2022, Belgrade, Serbia. 2022;I:149-152.
https://hdl.handle.net/21.15107/rcub_cer_6685 .

Jović-Jovičić, Nataša, Ilić, Irena, Ajduković, Marija, Milutinović Nikolić, Aleksandra, "Kinetic and thermodynamic study of nicotine degradation by oxone® activated by cobalt based catalyst" in Proceedings - 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2022, September, 26-30, 2022, Belgrade, Serbia, I (2022):149-152,
https://hdl.handle.net/21.15107/rcub_cer_6685 .

TY  - CONF
AU  - Pagnacco, Maja
AU  - Maksimović, Jelena
AU  - Mudrinić, Tihana
AU  - Ajduković, Marija
AU  - Banković, Predrag
AU  - Milutinović Nikolić, Aleksandra
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6727
AB  - The oscillatory Briggs-Rauscher (BR) reaction was applied on solid insoluble materials -
bentonite clays from different deposits: Wyoming (Swy-2), Texas (STx-1b), Idaho (SbId-1), 
Arizona (SAz-2), Bogovina and Mečji Do, last two from Serbia. Under the same BR 
experimental conditions, the addition of identical masses (0.25 g) of particular clay resulted in 
different effects on oscillatory dynamics. There is a prolongation, quenching, or no influence 
on oscillatory dynamics. Additionally, in the case of different masses of clay added, the 
response of the BR oscillating system resulted in a complex behavior pattern (oscillatory 
period vs. bentonite mass). This complex behavior pattern (firstly obtained by using clays in 
BR), could be applied as a fingerprint for bentonite identification. It is supported by facts that 
montmorillonite/beidellite ratio, cation exchange capacity, principal exchange cation, the 
extent of iron leaching in the acidic environment of BR reaction, and specific surface area of 
each used clays were not exclusively responsible for observed behavior in oscillatory 
reaction. This means that all bentonite’s properties combined are probably responsible for 
behavior obtained in oscillatory reaction, making BR reaction as an easily available and 
economical method for the identification of bentonite clay origin
PB  - Serbian Ceramic Society
C3  - Program and the book of abstracts - Serbian Ceramic Society Conference – Advanced Ceramics and Application X, "New Frontiers in Multifunctional Material Science and Processing", 26-27. September 2022, Belgrade, Serbia
T1  - The Briggs-Rauscher oscillatory reaction method as a “fingerprint” for bentonite clays
SP  - 46
EP  - 46
UR  - https://hdl.handle.net/21.15107/rcub_cer_6727
ER  - 

@conference{
author = "Pagnacco, Maja and Maksimović, Jelena and Mudrinić, Tihana and Ajduković, Marija and Banković, Predrag and Milutinović Nikolić, Aleksandra",
year = "2022",
abstract = "The oscillatory Briggs-Rauscher (BR) reaction was applied on solid insoluble materials -
bentonite clays from different deposits: Wyoming (Swy-2), Texas (STx-1b), Idaho (SbId-1), 
Arizona (SAz-2), Bogovina and Mečji Do, last two from Serbia. Under the same BR 
experimental conditions, the addition of identical masses (0.25 g) of particular clay resulted in 
different effects on oscillatory dynamics. There is a prolongation, quenching, or no influence 
on oscillatory dynamics. Additionally, in the case of different masses of clay added, the 
response of the BR oscillating system resulted in a complex behavior pattern (oscillatory 
period vs. bentonite mass). This complex behavior pattern (firstly obtained by using clays in 
BR), could be applied as a fingerprint for bentonite identification. It is supported by facts that 
montmorillonite/beidellite ratio, cation exchange capacity, principal exchange cation, the 
extent of iron leaching in the acidic environment of BR reaction, and specific surface area of 
each used clays were not exclusively responsible for observed behavior in oscillatory 
reaction. This means that all bentonite’s properties combined are probably responsible for 
behavior obtained in oscillatory reaction, making BR reaction as an easily available and 
economical method for the identification of bentonite clay origin",
publisher = "Serbian Ceramic Society",
journal = "Program and the book of abstracts - Serbian Ceramic Society Conference – Advanced Ceramics and Application X, "New Frontiers in Multifunctional Material Science and Processing", 26-27. September 2022, Belgrade, Serbia",
title = "The Briggs-Rauscher oscillatory reaction method as a “fingerprint” for bentonite clays",
pages = "46-46",
url = "https://hdl.handle.net/21.15107/rcub_cer_6727"
}

Pagnacco, M., Maksimović, J., Mudrinić, T., Ajduković, M., Banković, P.,& Milutinović Nikolić, A.. (2022). The Briggs-Rauscher oscillatory reaction method as a “fingerprint” for bentonite clays. in Program and the book of abstracts - Serbian Ceramic Society Conference – Advanced Ceramics and Application X, "New Frontiers in Multifunctional Material Science and Processing", 26-27. September 2022, Belgrade, Serbia
Serbian Ceramic Society., 46-46.
https://hdl.handle.net/21.15107/rcub_cer_6727

Pagnacco M, Maksimović J, Mudrinić T, Ajduković M, Banković P, Milutinović Nikolić A. The Briggs-Rauscher oscillatory reaction method as a “fingerprint” for bentonite clays. in Program and the book of abstracts - Serbian Ceramic Society Conference – Advanced Ceramics and Application X, "New Frontiers in Multifunctional Material Science and Processing", 26-27. September 2022, Belgrade, Serbia. 2022;:46-46.
https://hdl.handle.net/21.15107/rcub_cer_6727 .

Pagnacco, Maja, Maksimović, Jelena, Mudrinić, Tihana, Ajduković, Marija, Banković, Predrag, Milutinović Nikolić, Aleksandra, "The Briggs-Rauscher oscillatory reaction method as a “fingerprint” for bentonite clays" in Program and the book of abstracts - Serbian Ceramic Society Conference – Advanced Ceramics and Application X, "New Frontiers in Multifunctional Material Science and Processing", 26-27. September 2022, Belgrade, Serbia (2022):46-46,
https://hdl.handle.net/21.15107/rcub_cer_6727 .

TY  - CONF
AU  - Kosić, Višnja
AU  - Pavlović, Stefan
AU  - Božić, Nataša
AU  - Dojnov, Biljana
AU  - Stevanović, Gordana
AU  - Knežević-Jugović, Zorica
AU  - Milutinović Nikolić, Aleksandra
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5925
AB  - α-Amylase from Bacillus paralicheniformis (BliAmy) is a highly efficient raw starch digesting enzyme. Starch is an inexpensive source of many food industrial products. Naturally occurring clay are non-toxic, environmentally friendly and inexpensive. Therefore, immobilization of BliAmy by adsorption on three differently modified bentonites was studied. Modifications included common Na-exchange procedure, acid activation, and alkali activation. The modified clays were characterized by X-ray powder diffraction, mercury intrusion porosimetry and the points of zero charge were determined. The adsorption of the enzyme was significantly influenced by the type of modification of bentonite, being the highest for the acid-activated bentonite with the highest porosity. On the other hand, the highest enzyme activity for immobilized α-amylase was obtained with alkali-modified bentonite (98 U/g), suggesting it as a good candidate for immobilization of α-amylase for application in the food industry.
PB  - The Society of Physical Chemists of Serbia
C3  - Proceedings - 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2022, September, 26-30, 2022, Belgrade, Serbia
T1  - Immobilization of α-amylase from bacillus paralicheniformis on bentonites
SP  - 161
EP  - 164
UR  - https://hdl.handle.net/21.15107/rcub_cer_5925
ER  - 

@conference{
author = "Kosić, Višnja and Pavlović, Stefan and Božić, Nataša and Dojnov, Biljana and Stevanović, Gordana and Knežević-Jugović, Zorica and Milutinović Nikolić, Aleksandra",
year = "2022",
abstract = "α-Amylase from Bacillus paralicheniformis (BliAmy) is a highly efficient raw starch digesting enzyme. Starch is an inexpensive source of many food industrial products. Naturally occurring clay are non-toxic, environmentally friendly and inexpensive. Therefore, immobilization of BliAmy by adsorption on three differently modified bentonites was studied. Modifications included common Na-exchange procedure, acid activation, and alkali activation. The modified clays were characterized by X-ray powder diffraction, mercury intrusion porosimetry and the points of zero charge were determined. The adsorption of the enzyme was significantly influenced by the type of modification of bentonite, being the highest for the acid-activated bentonite with the highest porosity. On the other hand, the highest enzyme activity for immobilized α-amylase was obtained with alkali-modified bentonite (98 U/g), suggesting it as a good candidate for immobilization of α-amylase for application in the food industry.",
publisher = "The Society of Physical Chemists of Serbia",
journal = "Proceedings - 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2022, September, 26-30, 2022, Belgrade, Serbia",
title = "Immobilization of α-amylase from bacillus paralicheniformis on bentonites",
pages = "161-164",
url = "https://hdl.handle.net/21.15107/rcub_cer_5925"
}

Kosić, V., Pavlović, S., Božić, N., Dojnov, B., Stevanović, G., Knežević-Jugović, Z.,& Milutinović Nikolić, A.. (2022). Immobilization of α-amylase from bacillus paralicheniformis on bentonites. in Proceedings - 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2022, September, 26-30, 2022, Belgrade, Serbia
The Society of Physical Chemists of Serbia., 161-164.
https://hdl.handle.net/21.15107/rcub_cer_5925

Kosić V, Pavlović S, Božić N, Dojnov B, Stevanović G, Knežević-Jugović Z, Milutinović Nikolić A. Immobilization of α-amylase from bacillus paralicheniformis on bentonites. in Proceedings - 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2022, September, 26-30, 2022, Belgrade, Serbia. 2022;:161-164.
https://hdl.handle.net/21.15107/rcub_cer_5925 .

Kosić, Višnja, Pavlović, Stefan, Božić, Nataša, Dojnov, Biljana, Stevanović, Gordana, Knežević-Jugović, Zorica, Milutinović Nikolić, Aleksandra, "Immobilization of α-amylase from bacillus paralicheniformis on bentonites" in Proceedings - 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2022, September, 26-30, 2022, Belgrade, Serbia (2022):161-164,
https://hdl.handle.net/21.15107/rcub_cer_5925 .

TY  - JOUR
AU  - Mudrinić, Tihana
AU  - Petrović, Srđan
AU  - Krstić, Jugoslav
AU  - Milovanović, Biljana
AU  - Pavlović, Stefan
AU  - Banković, Predrag
AU  - Milutinović Nikolić, Aleksandra
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5308
AB  - The main goals of this study are: i) employ the electrochemical methods as alternative methods for alumina-supported cobalt (Co-A) surface characterization; ii) investigate the electro-catalytic activity of different cobalt phases toward glucose, and iii) implement the mechanochemical approach for the synthesis of the fourth generation of glucose sensing materials. Co3O4 and alumina were either manual grinded (Co3O4-A) or ball-milled (CoAl2O4-A) with different amounts of cobalt in CoAl2O4-A. The final products were characterized by XRF, LDPSA, XRD and TPR. The electrodes were prepared in the form of the carbon paste electrode and tested in supporting electrolyte (1 M NaOH) as well as in a glucose-containing solution. The CV, EIS, and chronoamperometry were used for electrochemical measurements. TPR revealed the formation of CoAl2O4 during the ball milling process. Different cobalt phases significantly affected the electrochemical responses. Higher activity of CoAl2O4-A toward glucose oxidation in comparison with Co3O4-A was ascribed to tetrahedral Co2+ ion acting as the active site in glucose oxidation. In addition, results convinced employing the scarcely employed mechanochemical synthesis protocols for obtaining glucose-sensing materials. Finally, it was proven that electrochemical techniques can be harnessed as alternative, new, powerful methods for Co-A surface characterization.
PB  - Elsevier
T2  - Surfaces and Interfaces
T1  - Electrochemical approach to the surface characterization of mechanochemically synthesized alumina-supported cobalt applicable in glucose sensing
IS  - 102356
DO  - 10.1016/j.surfin.2022.102356
ER  - 

@article{
author = "Mudrinić, Tihana and Petrović, Srđan and Krstić, Jugoslav and Milovanović, Biljana and Pavlović, Stefan and Banković, Predrag and Milutinović Nikolić, Aleksandra",
year = "2022",
abstract = "The main goals of this study are: i) employ the electrochemical methods as alternative methods for alumina-supported cobalt (Co-A) surface characterization; ii) investigate the electro-catalytic activity of different cobalt phases toward glucose, and iii) implement the mechanochemical approach for the synthesis of the fourth generation of glucose sensing materials. Co3O4 and alumina were either manual grinded (Co3O4-A) or ball-milled (CoAl2O4-A) with different amounts of cobalt in CoAl2O4-A. The final products were characterized by XRF, LDPSA, XRD and TPR. The electrodes were prepared in the form of the carbon paste electrode and tested in supporting electrolyte (1 M NaOH) as well as in a glucose-containing solution. The CV, EIS, and chronoamperometry were used for electrochemical measurements. TPR revealed the formation of CoAl2O4 during the ball milling process. Different cobalt phases significantly affected the electrochemical responses. Higher activity of CoAl2O4-A toward glucose oxidation in comparison with Co3O4-A was ascribed to tetrahedral Co2+ ion acting as the active site in glucose oxidation. In addition, results convinced employing the scarcely employed mechanochemical synthesis protocols for obtaining glucose-sensing materials. Finally, it was proven that electrochemical techniques can be harnessed as alternative, new, powerful methods for Co-A surface characterization.",
publisher = "Elsevier",
journal = "Surfaces and Interfaces",
title = "Electrochemical approach to the surface characterization of mechanochemically synthesized alumina-supported cobalt applicable in glucose sensing",
number = "102356",
doi = "10.1016/j.surfin.2022.102356"
}

Mudrinić, T., Petrović, S., Krstić, J., Milovanović, B., Pavlović, S., Banković, P.,& Milutinović Nikolić, A.. (2022). Electrochemical approach to the surface characterization of mechanochemically synthesized alumina-supported cobalt applicable in glucose sensing. in Surfaces and Interfaces
Elsevier.(102356).
https://doi.org/10.1016/j.surfin.2022.102356

Mudrinić T, Petrović S, Krstić J, Milovanović B, Pavlović S, Banković P, Milutinović Nikolić A. Electrochemical approach to the surface characterization of mechanochemically synthesized alumina-supported cobalt applicable in glucose sensing. in Surfaces and Interfaces. 2022;(102356).
doi:10.1016/j.surfin.2022.102356 .

Mudrinić, Tihana, Petrović, Srđan, Krstić, Jugoslav, Milovanović, Biljana, Pavlović, Stefan, Banković, Predrag, Milutinović Nikolić, Aleksandra, "Electrochemical approach to the surface characterization of mechanochemically synthesized alumina-supported cobalt applicable in glucose sensing" in Surfaces and Interfaces, no. 102356 (2022),
https://doi.org/10.1016/j.surfin.2022.102356 . .

TY  - JOUR
AU  - Stevanović, Gordana
AU  - Jović-Jovičić, Nataša
AU  - Krstić, Jugoslav
AU  - Milutinović Nikolić, Aleksandra
AU  - Banković, Predrag
AU  - Popović, Aleksandar
AU  - Ajduković, Marija
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5437
AB  - Chitosan (Ch)-derived from biowaste along with smectite, an abundant clay mineral, were used in a low-cost and eco-friendly synthesis of a new type of catalyst. Nanocomposite catalysts constituted of Co supported on smectite with chitosan-derived carbon loading were obtained using an impregnation carbonization procedure and denoted as Co/cCh-S-T (T stands for applied carbonization temperature). The carbonization was performed in the temperature range from 400 °C to 700 °C in the flow of N2 providing inert atmosphere. The temperature of 500 °C was found to be the most suitable for catalyst synthesis regarding catalytic performance in a peroxymonosulfate activated degradation of tartrazine. The incorporation of carbonized chitosan structure within the interlamellar space of the smectite was confirmed using X-ray powder diffraction. The high-resolution transmission electron microscopy confirmed a layered structure of nanocomposites characteristic for smectite, as well as the presence of small spherical cobalt containing nanoformations (confirmed by energy dispersive X-ray spectroscopy) well dispersed within structure. The existance of cobalt in the CoII and CoIII oxidation state was proven by X-ray photoelectron spectroscopy. The Co/cCh-S-500 catalyst was proven to be stable and efficient after 5 consecutive cycles. This work showed that nanocomposite Co-catalysts, based on smectite and biowaste-derived carbon, as peroxymonosulfate activators exhibited a very promising performance in the degradation of water pollutants.
PB  - Elsevier
T2  - Applied  Clay Sciences
T1  - Nanocomposite co-catalysts, based on smectite and biowaste-derived carbon, as peroxymonosulfate activators in degradation of tartrazine
VL  - 230
SP  - 106718
DO  - 10.1016/j.clay.2022.106718
ER  - 

@article{
author = "Stevanović, Gordana and Jović-Jovičić, Nataša and Krstić, Jugoslav and Milutinović Nikolić, Aleksandra and Banković, Predrag and Popović, Aleksandar and Ajduković, Marija",
year = "2022",
abstract = "Chitosan (Ch)-derived from biowaste along with smectite, an abundant clay mineral, were used in a low-cost and eco-friendly synthesis of a new type of catalyst. Nanocomposite catalysts constituted of Co supported on smectite with chitosan-derived carbon loading were obtained using an impregnation carbonization procedure and denoted as Co/cCh-S-T (T stands for applied carbonization temperature). The carbonization was performed in the temperature range from 400 °C to 700 °C in the flow of N2 providing inert atmosphere. The temperature of 500 °C was found to be the most suitable for catalyst synthesis regarding catalytic performance in a peroxymonosulfate activated degradation of tartrazine. The incorporation of carbonized chitosan structure within the interlamellar space of the smectite was confirmed using X-ray powder diffraction. The high-resolution transmission electron microscopy confirmed a layered structure of nanocomposites characteristic for smectite, as well as the presence of small spherical cobalt containing nanoformations (confirmed by energy dispersive X-ray spectroscopy) well dispersed within structure. The existance of cobalt in the CoII and CoIII oxidation state was proven by X-ray photoelectron spectroscopy. The Co/cCh-S-500 catalyst was proven to be stable and efficient after 5 consecutive cycles. This work showed that nanocomposite Co-catalysts, based on smectite and biowaste-derived carbon, as peroxymonosulfate activators exhibited a very promising performance in the degradation of water pollutants.",
publisher = "Elsevier",
journal = "Applied  Clay Sciences",
title = "Nanocomposite co-catalysts, based on smectite and biowaste-derived carbon, as peroxymonosulfate activators in degradation of tartrazine",
volume = "230",
pages = "106718",
doi = "10.1016/j.clay.2022.106718"
}

Stevanović, G., Jović-Jovičić, N., Krstić, J., Milutinović Nikolić, A., Banković, P., Popović, A.,& Ajduković, M.. (2022). Nanocomposite co-catalysts, based on smectite and biowaste-derived carbon, as peroxymonosulfate activators in degradation of tartrazine. in Applied  Clay Sciences
Elsevier., 230, 106718.
https://doi.org/10.1016/j.clay.2022.106718

Stevanović G, Jović-Jovičić N, Krstić J, Milutinović Nikolić A, Banković P, Popović A, Ajduković M. Nanocomposite co-catalysts, based on smectite and biowaste-derived carbon, as peroxymonosulfate activators in degradation of tartrazine. in Applied  Clay Sciences. 2022;230:106718.
doi:10.1016/j.clay.2022.106718 .

Stevanović, Gordana, Jović-Jovičić, Nataša, Krstić, Jugoslav, Milutinović Nikolić, Aleksandra, Banković, Predrag, Popović, Aleksandar, Ajduković, Marija, "Nanocomposite co-catalysts, based on smectite and biowaste-derived carbon, as peroxymonosulfate activators in degradation of tartrazine" in Applied  Clay Sciences, 230 (2022):106718,
https://doi.org/10.1016/j.clay.2022.106718 . .

TY  - JOUR
AU  - Mudrinić, Tihana
AU  - Petrović, Srđan
AU  - Krstić, Jugoslav
AU  - Milovanović, Biljana
AU  - Pavlović, Stefan
AU  - Banković, Predrag
AU  - Milutinović Nikolić, Aleksandra
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5616
AB  - The main goals of this study are: i) employ the electrochemical methods as alternative methods for alumina-supported cobalt (Co-A) surface characterization; ii) investigate the electro-catalytic activity of different cobalt phases toward glucose, and iii) implement the mechanochemical approach for the synthesis of the fourth generation of glucose sensing materials. Co3O4 and alumina were either manual grinded (Co3O4-A) or ball-milled (CoAl2O4-A) with different amounts of cobalt in CoAl2O4-A. The final products were characterized by XRF, LDPSA, XRD and TPR. The electrodes were prepared in the form of the carbon paste electrode and tested in supporting electrolyte (1 M NaOH) as well as in a glucose-containing solution. The CV, EIS, and chronoamperometry were used for electrochemical measurements. TPR revealed the formation of CoAl2O4 during the ball milling process. Different cobalt phases significantly affected the electrochemical responses. Higher activity of CoAl2O4-A toward glucose oxidation in comparison with Co3O4-A was ascribed to tetrahedral Co2+ ion acting as the active site in glucose oxidation. In addition, results convinced employing the scarcely employed mechanochemical synthesis protocols for obtaining glucose-sensing materials. Finally, it was proven that electrochemical techniques can be harnessed as alternative, new, powerful methods for Co-A surface characterization.
PB  - Elsevier
T2  - Surfaces and Interfaces
T1  - Electrochemical approach to the surface characterization of mechanochemically synthesized alumina-supported cobalt applicable in glucose sensing
IS  - 102356
DO  - 10.1016/j.surfin.2022.102356
ER  - 

@article{
author = "Mudrinić, Tihana and Petrović, Srđan and Krstić, Jugoslav and Milovanović, Biljana and Pavlović, Stefan and Banković, Predrag and Milutinović Nikolić, Aleksandra",
year = "2022",
abstract = "The main goals of this study are: i) employ the electrochemical methods as alternative methods for alumina-supported cobalt (Co-A) surface characterization; ii) investigate the electro-catalytic activity of different cobalt phases toward glucose, and iii) implement the mechanochemical approach for the synthesis of the fourth generation of glucose sensing materials. Co3O4 and alumina were either manual grinded (Co3O4-A) or ball-milled (CoAl2O4-A) with different amounts of cobalt in CoAl2O4-A. The final products were characterized by XRF, LDPSA, XRD and TPR. The electrodes were prepared in the form of the carbon paste electrode and tested in supporting electrolyte (1 M NaOH) as well as in a glucose-containing solution. The CV, EIS, and chronoamperometry were used for electrochemical measurements. TPR revealed the formation of CoAl2O4 during the ball milling process. Different cobalt phases significantly affected the electrochemical responses. Higher activity of CoAl2O4-A toward glucose oxidation in comparison with Co3O4-A was ascribed to tetrahedral Co2+ ion acting as the active site in glucose oxidation. In addition, results convinced employing the scarcely employed mechanochemical synthesis protocols for obtaining glucose-sensing materials. Finally, it was proven that electrochemical techniques can be harnessed as alternative, new, powerful methods for Co-A surface characterization.",
publisher = "Elsevier",
journal = "Surfaces and Interfaces",
title = "Electrochemical approach to the surface characterization of mechanochemically synthesized alumina-supported cobalt applicable in glucose sensing",
number = "102356",
doi = "10.1016/j.surfin.2022.102356"
}

Mudrinić, T., Petrović, S., Krstić, J., Milovanović, B., Pavlović, S., Banković, P.,& Milutinović Nikolić, A.. (2022). Electrochemical approach to the surface characterization of mechanochemically synthesized alumina-supported cobalt applicable in glucose sensing. in Surfaces and Interfaces
Elsevier.(102356).
https://doi.org/10.1016/j.surfin.2022.102356

Mudrinić T, Petrović S, Krstić J, Milovanović B, Pavlović S, Banković P, Milutinović Nikolić A. Electrochemical approach to the surface characterization of mechanochemically synthesized alumina-supported cobalt applicable in glucose sensing. in Surfaces and Interfaces. 2022;(102356).
doi:10.1016/j.surfin.2022.102356 .

Mudrinić, Tihana, Petrović, Srđan, Krstić, Jugoslav, Milovanović, Biljana, Pavlović, Stefan, Banković, Predrag, Milutinović Nikolić, Aleksandra, "Electrochemical approach to the surface characterization of mechanochemically synthesized alumina-supported cobalt applicable in glucose sensing" in Surfaces and Interfaces, no. 102356 (2022),
https://doi.org/10.1016/j.surfin.2022.102356 . .

TY  - CONF
AU  - Mudrinić, Tihana
AU  - Milovanović, Biljana
AU  - Marinović, Sanja
AU  - Petrović, Srđan
AU  - Krstić, Jugoslav
AU  - Banković, Predrag
AU  - Milutinović Nikolić, Aleksandra
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6359
AB  - In recent years, mineral oxides (i.e. zeolite, alumina and clay minerals)-supported non-precious transition metals have extensively studied as highly promising sustainable and green glucose-sensing materials (Mudrinić, 2019). The reason for that is their low cost, easiness of synthesis, low negative environmental impact, and desirable electrochemical properties toward glucose oxidation. 
It is widely accepted that the catalytic activity of the mineral oxides-supported cobalt is strongly influenced by cobalt-mineral oxide interaction. As a consequence of this interaction different cobalt oxides (Wang, 1991) could be formed: Co3O4-contains both cobalt ions in tetrahedral (Co2+Td) and octahedral (Co3+Oh) coordination and CoAl2O4-contains only Co2+Td. However, little is known about the catalytic activity of these cobalt oxides (i.e. cobalt ions) in the reaction of the electro-oxidation of glucose. 
In this work, cobalt oxides in both tetrahedral (Co2+Td) and octahedral (Co3+Oh) coordination and with only Co2+Td were synthesized on aluminum pillared clay (AP) and alumina (A). The obtained materials were characterized by X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and temperature-programmed reduction (TPR). Electrochemical measurements were performed in alkaline solution with and without glucose using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and chronoamperometry (CA). TPR and XPS along with the results of electrochemical measurements in alkaline solutions without glucose confirmed the successful synthesis of the different cobalt oxides on both AP and A. The electrochemical measurements in glucose-containing solutions showed the enhanced electrocatalytic activity of AP and A with Co2+Td in comparison to their counterparts with both Co2+Td and Co3+Oh.  This result suggested that the Co2+Td acted as the main active site for the glucose oxidation.
PB  - The clay mineral society
C3  - Scientific research abstracts - AIPEA - 17th International Clay Conference (ICC 2022), 25-29 July, Istanbul, Turkey
T1  - Electrocatalytic activity of different cobalt oxides supported on mineral oxides toward glucose oxidation
SP  - 331
EP  - 331
UR  - https://hdl.handle.net/21.15107/rcub_cer_6359
ER  - 

@conference{
author = "Mudrinić, Tihana and Milovanović, Biljana and Marinović, Sanja and Petrović, Srđan and Krstić, Jugoslav and Banković, Predrag and Milutinović Nikolić, Aleksandra",
year = "2022",
abstract = "In recent years, mineral oxides (i.e. zeolite, alumina and clay minerals)-supported non-precious transition metals have extensively studied as highly promising sustainable and green glucose-sensing materials (Mudrinić, 2019). The reason for that is their low cost, easiness of synthesis, low negative environmental impact, and desirable electrochemical properties toward glucose oxidation. 
It is widely accepted that the catalytic activity of the mineral oxides-supported cobalt is strongly influenced by cobalt-mineral oxide interaction. As a consequence of this interaction different cobalt oxides (Wang, 1991) could be formed: Co3O4-contains both cobalt ions in tetrahedral (Co2+Td) and octahedral (Co3+Oh) coordination and CoAl2O4-contains only Co2+Td. However, little is known about the catalytic activity of these cobalt oxides (i.e. cobalt ions) in the reaction of the electro-oxidation of glucose. 
In this work, cobalt oxides in both tetrahedral (Co2+Td) and octahedral (Co3+Oh) coordination and with only Co2+Td were synthesized on aluminum pillared clay (AP) and alumina (A). The obtained materials were characterized by X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and temperature-programmed reduction (TPR). Electrochemical measurements were performed in alkaline solution with and without glucose using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and chronoamperometry (CA). TPR and XPS along with the results of electrochemical measurements in alkaline solutions without glucose confirmed the successful synthesis of the different cobalt oxides on both AP and A. The electrochemical measurements in glucose-containing solutions showed the enhanced electrocatalytic activity of AP and A with Co2+Td in comparison to their counterparts with both Co2+Td and Co3+Oh.  This result suggested that the Co2+Td acted as the main active site for the glucose oxidation.",
publisher = "The clay mineral society",
journal = "Scientific research abstracts - AIPEA - 17th International Clay Conference (ICC 2022), 25-29 July, Istanbul, Turkey",
title = "Electrocatalytic activity of different cobalt oxides supported on mineral oxides toward glucose oxidation",
pages = "331-331",
url = "https://hdl.handle.net/21.15107/rcub_cer_6359"
}

Mudrinić, T., Milovanović, B., Marinović, S., Petrović, S., Krstić, J., Banković, P.,& Milutinović Nikolić, A.. (2022). Electrocatalytic activity of different cobalt oxides supported on mineral oxides toward glucose oxidation. in Scientific research abstracts - AIPEA - 17th International Clay Conference (ICC 2022), 25-29 July, Istanbul, Turkey
The clay mineral society., 331-331.
https://hdl.handle.net/21.15107/rcub_cer_6359

Mudrinić T, Milovanović B, Marinović S, Petrović S, Krstić J, Banković P, Milutinović Nikolić A. Electrocatalytic activity of different cobalt oxides supported on mineral oxides toward glucose oxidation. in Scientific research abstracts - AIPEA - 17th International Clay Conference (ICC 2022), 25-29 July, Istanbul, Turkey. 2022;:331-331.
https://hdl.handle.net/21.15107/rcub_cer_6359 .

Mudrinić, Tihana, Milovanović, Biljana, Marinović, Sanja, Petrović, Srđan, Krstić, Jugoslav, Banković, Predrag, Milutinović Nikolić, Aleksandra, "Electrocatalytic activity of different cobalt oxides supported on mineral oxides toward glucose oxidation" in Scientific research abstracts - AIPEA - 17th International Clay Conference (ICC 2022), 25-29 July, Istanbul, Turkey (2022):331-331,
https://hdl.handle.net/21.15107/rcub_cer_6359 .

TY  - JOUR
AU  - Jović-Jovičić, Nataša
AU  - Bajuk Bogdanović, Danica
AU  - Novaković, Tatjana
AU  - Banković, Predrag
AU  - Milutinović Nikolić, Aleksandra
AU  - Mojović, Zorica
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5791
AB  - Organomodified bentonites were obtained by modification of bentonite clay from local mine Bogovina, with four different alkylammonium ions in the amounts that correspond to cation exchange capacity. Carbonized bentonites, obtained by pyrolyzing the organomodified bentonites in the flow of nitrogen, were characterized using XRD, low-temperature N2 physisorption and Raman spectroscopy. Structural and textural properties of carbonized bentonites depended on the arrangement of alkylammonium cations in the paternal organomodified bentonite, while the Raman spectroscopy confirmed the presence of amorphous carbon. The obtained carbonized bentonites were used for modification of the carbon paste electrode. The modified electrodes were investigated using cyclic voltammetry and electrochemical impedance spectroscopy. The electrosorption of chloride and sulfate anions on carbonized bentonites was studied by chronocoulometry. The results were interpreted in the terms of surface groups and textural properties of the carbonized bentonites.
AB  - Органомодификовани бентонити су добијени модификацијом бентонита из локалног рудника Боговина са четири различита алкиламонијум јона у количини која је једнака његовом капацитету јонске измене. Карбонизовани бентонити, добијени пиролизом органомодификованих бентонита у струји азота, окарактерисани су помоћу дифракције Х-зрачења (XRD), нискотемпературском физисорпцијом азота и Раманском спектроскопијом. Структурна и текстурална својства карбонизованих бентонита зависe од уређења алкиламонијум катјона у одговарајућем полазном органомодификованом бентониту. Резултати карактеризације су показали да особине узорака зависе од распореда алкил- амонијум катјона у органомодификованом бентониту од ког су настали, док је Раманска спектроскопија потврдила присуство аморфног угљеника. Добијени карбонизовани бентонити су коришћени за модификацију електроде од пасте угљеника. Модификоване електроде су испитане помоћу цикличне волтаметрије и електрохемијске импедансне спектроскопије. Електросорпција хлорида и сулфата је проучавана помоћу хронокуло- нометрије. Резултати су протумачени на основу присутних површинских група и текстуралних својстава карбонизованих бентонита.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Electrochemical properties of carbonized bentonite
T1  - Elektrohemijska svojstva karbonizovanih bentonita
VL  - 88
IS  - 1
SP  - 41
EP  - 54
DO  - 10.2298/JSC220127030J
ER  - 

@article{
author = "Jović-Jovičić, Nataša and Bajuk Bogdanović, Danica and Novaković, Tatjana and Banković, Predrag and Milutinović Nikolić, Aleksandra and Mojović, Zorica",
year = "2022",
abstract = "Organomodified bentonites were obtained by modification of bentonite clay from local mine Bogovina, with four different alkylammonium ions in the amounts that correspond to cation exchange capacity. Carbonized bentonites, obtained by pyrolyzing the organomodified bentonites in the flow of nitrogen, were characterized using XRD, low-temperature N2 physisorption and Raman spectroscopy. Structural and textural properties of carbonized bentonites depended on the arrangement of alkylammonium cations in the paternal organomodified bentonite, while the Raman spectroscopy confirmed the presence of amorphous carbon. The obtained carbonized bentonites were used for modification of the carbon paste electrode. The modified electrodes were investigated using cyclic voltammetry and electrochemical impedance spectroscopy. The electrosorption of chloride and sulfate anions on carbonized bentonites was studied by chronocoulometry. The results were interpreted in the terms of surface groups and textural properties of the carbonized bentonites., Органомодификовани бентонити су добијени модификацијом бентонита из локалног рудника Боговина са четири различита алкиламонијум јона у количини која је једнака његовом капацитету јонске измене. Карбонизовани бентонити, добијени пиролизом органомодификованих бентонита у струји азота, окарактерисани су помоћу дифракције Х-зрачења (XRD), нискотемпературском физисорпцијом азота и Раманском спектроскопијом. Структурна и текстурална својства карбонизованих бентонита зависe од уређења алкиламонијум катјона у одговарајућем полазном органомодификованом бентониту. Резултати карактеризације су показали да особине узорака зависе од распореда алкил- амонијум катјона у органомодификованом бентониту од ког су настали, док је Раманска спектроскопија потврдила присуство аморфног угљеника. Добијени карбонизовани бентонити су коришћени за модификацију електроде од пасте угљеника. Модификоване електроде су испитане помоћу цикличне волтаметрије и електрохемијске импедансне спектроскопије. Електросорпција хлорида и сулфата је проучавана помоћу хронокуло- нометрије. Резултати су протумачени на основу присутних површинских група и текстуралних својстава карбонизованих бентонита.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Electrochemical properties of carbonized bentonite, Elektrohemijska svojstva karbonizovanih bentonita",
volume = "88",
number = "1",
pages = "41-54",
doi = "10.2298/JSC220127030J"
}

Jović-Jovičić, N., Bajuk Bogdanović, D., Novaković, T., Banković, P., Milutinović Nikolić, A.,& Mojović, Z.. (2022). Electrochemical properties of carbonized bentonite. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 88(1), 41-54.
https://doi.org/10.2298/JSC220127030J

Jović-Jovičić N, Bajuk Bogdanović D, Novaković T, Banković P, Milutinović Nikolić A, Mojović Z. Electrochemical properties of carbonized bentonite. in Journal of the Serbian Chemical Society. 2022;88(1):41-54.
doi:10.2298/JSC220127030J .

Jović-Jovičić, Nataša, Bajuk Bogdanović, Danica, Novaković, Tatjana, Banković, Predrag, Milutinović Nikolić, Aleksandra, Mojović, Zorica, "Electrochemical properties of carbonized bentonite" in Journal of the Serbian Chemical Society, 88, no. 1 (2022):41-54,
https://doi.org/10.2298/JSC220127030J . .

TY  - CONF
AU  - Milovanović, Biljana
AU  - Petrović, Rada
AU  - Marinović, Sanja
AU  - Milutinović Nikolić, Aleksandra
AU  - Banković, Predrag
AU  - Mudrinić, Tihana
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6360
AB  - Aluminum pillared montmorillonite-supported cobalt (Co/AP) has proven to be a suitable non-enzymatic
sensing material (Mudrinić, 2019). Beside low cost, Co/AP exhibited adequate electrocatalytic performance
toward glucose. However, further improvements of electrocatalytic performances are needed, especially
regarding increasing sensitivity and widening the linear range of glucose detection.
In this regard, in addition to the monometallic cobalt oxide catalyst, a series of bimetallic catalysts
supported on AP (Co+Cu/AP, Co+Zn/AP, Co+Fe/AP, and Co+Ni/AP) have been synthesized by the
incipient wetness impregnation method (Pinna, 1998). The total amount of supported metal was fixed at 4
mass%, while cobalt:dopant molar ratio was 9:1 for all samples. The synthesized materials were prepared
in the form of carbon paste electrode (Co+dopant/AP-CPE) with the same mass ratio of Co+dopant/AP to
carbon black (CB) and applied as a working electrode.
All the electrochemical measurements of each Co+dopant/AP-CPE were conducted using an Autolab
PGSTAT302N potentiostat with Nova 2.1 software. The experiments were carried out in a three-electrode
cell with prepared electrodes as working, Ag/AgCl (3 M KCl) as a reference electrode, and platinum rod
as a counter electrode. Electrochemical behavior of the working electrodes for glucose detection was
studied by the cyclic voltammetry and chronoamperometry in alkaline solution, with and without glucose.
Among investigated electrodes for glucose electrooxidation, the Co+Fe/AP-CPE exhibited the highest
current response with the best sensitivity. These very first results indicated a vital role of Fe in enhancing
the glucose-sensing performance of aluminum pillared montmorillonite-supported cobalt. The physical
chemical characterization of all Co+dopant/AP materials is ongoing.
PB  - The clay mineral society
C3  - Scientific research abstracts - AIPEA - 17th International Clay Conference (ICC 2022), 25-29 July, Istanbul, Turkey
T1  - Electrocatalytic behavior of pillared montmorillonite-supported cobalt oxide doped with Cu, Zn, Fe, and Ni for glucose sensing
SP  - 330
EP  - 330
UR  - https://hdl.handle.net/21.15107/rcub_cer_6360
ER  - 

@conference{
author = "Milovanović, Biljana and Petrović, Rada and Marinović, Sanja and Milutinović Nikolić, Aleksandra and Banković, Predrag and Mudrinić, Tihana",
year = "2022",
abstract = "Aluminum pillared montmorillonite-supported cobalt (Co/AP) has proven to be a suitable non-enzymatic
sensing material (Mudrinić, 2019). Beside low cost, Co/AP exhibited adequate electrocatalytic performance
toward glucose. However, further improvements of electrocatalytic performances are needed, especially
regarding increasing sensitivity and widening the linear range of glucose detection.
In this regard, in addition to the monometallic cobalt oxide catalyst, a series of bimetallic catalysts
supported on AP (Co+Cu/AP, Co+Zn/AP, Co+Fe/AP, and Co+Ni/AP) have been synthesized by the
incipient wetness impregnation method (Pinna, 1998). The total amount of supported metal was fixed at 4
mass%, while cobalt:dopant molar ratio was 9:1 for all samples. The synthesized materials were prepared
in the form of carbon paste electrode (Co+dopant/AP-CPE) with the same mass ratio of Co+dopant/AP to
carbon black (CB) and applied as a working electrode.
All the electrochemical measurements of each Co+dopant/AP-CPE were conducted using an Autolab
PGSTAT302N potentiostat with Nova 2.1 software. The experiments were carried out in a three-electrode
cell with prepared electrodes as working, Ag/AgCl (3 M KCl) as a reference electrode, and platinum rod
as a counter electrode. Electrochemical behavior of the working electrodes for glucose detection was
studied by the cyclic voltammetry and chronoamperometry in alkaline solution, with and without glucose.
Among investigated electrodes for glucose electrooxidation, the Co+Fe/AP-CPE exhibited the highest
current response with the best sensitivity. These very first results indicated a vital role of Fe in enhancing
the glucose-sensing performance of aluminum pillared montmorillonite-supported cobalt. The physical
chemical characterization of all Co+dopant/AP materials is ongoing.",
publisher = "The clay mineral society",
journal = "Scientific research abstracts - AIPEA - 17th International Clay Conference (ICC 2022), 25-29 July, Istanbul, Turkey",
title = "Electrocatalytic behavior of pillared montmorillonite-supported cobalt oxide doped with Cu, Zn, Fe, and Ni for glucose sensing",
pages = "330-330",
url = "https://hdl.handle.net/21.15107/rcub_cer_6360"
}

Milovanović, B., Petrović, R., Marinović, S., Milutinović Nikolić, A., Banković, P.,& Mudrinić, T.. (2022). Electrocatalytic behavior of pillared montmorillonite-supported cobalt oxide doped with Cu, Zn, Fe, and Ni for glucose sensing. in Scientific research abstracts - AIPEA - 17th International Clay Conference (ICC 2022), 25-29 July, Istanbul, Turkey
The clay mineral society., 330-330.
https://hdl.handle.net/21.15107/rcub_cer_6360

Milovanović B, Petrović R, Marinović S, Milutinović Nikolić A, Banković P, Mudrinić T. Electrocatalytic behavior of pillared montmorillonite-supported cobalt oxide doped with Cu, Zn, Fe, and Ni for glucose sensing. in Scientific research abstracts - AIPEA - 17th International Clay Conference (ICC 2022), 25-29 July, Istanbul, Turkey. 2022;:330-330.
https://hdl.handle.net/21.15107/rcub_cer_6360 .

Milovanović, Biljana, Petrović, Rada, Marinović, Sanja, Milutinović Nikolić, Aleksandra, Banković, Predrag, Mudrinić, Tihana, "Electrocatalytic behavior of pillared montmorillonite-supported cobalt oxide doped with Cu, Zn, Fe, and Ni for glucose sensing" in Scientific research abstracts - AIPEA - 17th International Clay Conference (ICC 2022), 25-29 July, Istanbul, Turkey (2022):330-330,
https://hdl.handle.net/21.15107/rcub_cer_6360 .

TY  - CONF
AU  - Ajduković, Marija
AU  - Jović-Jovičić, Nataša
AU  - Marinović, Sanja
AU  - Stevanović, Gordana
AU  - Mudrinić, Tihana
AU  - Milutinović Nikolić, Aleksandra
AU  - Banković, Predrag
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6282
AB  - In this work smectite pillared with mixture of aluminium and cobalt poly(hydroxo metal)
cations (Al,Co-PILC) was synthesized and tested as catalyst in degradation of food dye
tartrazine by peroxymonosulfate. The Al,Co-PILC was obtained using a common procedure
consisting of the following steps: grinding, sieving, Na exchange, intercalation, drying and
calcination. Co2+ to (Al3++Co2+) molar ratios in the pillaring solution was 10%. Catalytic tests
were carried out in a semibatch reactor under stirring and constant temperature maintained by
circulation of thermostatic fluid using Julabo MC 4 heating circulator. Initial dye
concentration was 50 ppm in the presence of excess of peroxymonosulfate. Decolorization of
tartrazine solution was monitored using UV-Vis spectrophotometry at  max= 426 nm. The
influence of the mass of the catalyst and reaction temperature was investigated.
Catalyst mass and temperature increase were beneficial for dye degradation rate. The catalytic
process at 30 ºC reached 97% for 120 min and besides decolorization included further
degradation of products of tartrazine oxidation. At 50 ºC complete decolorization occurred for
only 30 min. This work showed that application of smectite pillared with mixture of aluminium and cobalt poly(hydroxo metal) cations as peroxymonosulfate activators for
degradation of water pollutants is very promising.
PB  - Serbian Ceramic Society
C3  - Program and the book of abstracts - Serbian Ceramic Society Conference – Advanced Ceramics and Application X, 26-27th September 2022, Belgrade, Serbia
T1  - The evaluation of mixed Al,Co pillared catalyst in degradation of tartrazine dye in presence of peroxymonosulfate
SP  - 95
EP  - 96
UR  - https://hdl.handle.net/21.15107/rcub_cer_6282
ER  - 

@conference{
author = "Ajduković, Marija and Jović-Jovičić, Nataša and Marinović, Sanja and Stevanović, Gordana and Mudrinić, Tihana and Milutinović Nikolić, Aleksandra and Banković, Predrag",
year = "2022",
abstract = "In this work smectite pillared with mixture of aluminium and cobalt poly(hydroxo metal)
cations (Al,Co-PILC) was synthesized and tested as catalyst in degradation of food dye
tartrazine by peroxymonosulfate. The Al,Co-PILC was obtained using a common procedure
consisting of the following steps: grinding, sieving, Na exchange, intercalation, drying and
calcination. Co2+ to (Al3++Co2+) molar ratios in the pillaring solution was 10%. Catalytic tests
were carried out in a semibatch reactor under stirring and constant temperature maintained by
circulation of thermostatic fluid using Julabo MC 4 heating circulator. Initial dye
concentration was 50 ppm in the presence of excess of peroxymonosulfate. Decolorization of
tartrazine solution was monitored using UV-Vis spectrophotometry at  max= 426 nm. The
influence of the mass of the catalyst and reaction temperature was investigated.
Catalyst mass and temperature increase were beneficial for dye degradation rate. The catalytic
process at 30 ºC reached 97% for 120 min and besides decolorization included further
degradation of products of tartrazine oxidation. At 50 ºC complete decolorization occurred for
only 30 min. This work showed that application of smectite pillared with mixture of aluminium and cobalt poly(hydroxo metal) cations as peroxymonosulfate activators for
degradation of water pollutants is very promising.",
publisher = "Serbian Ceramic Society",
journal = "Program and the book of abstracts - Serbian Ceramic Society Conference – Advanced Ceramics and Application X, 26-27th September 2022, Belgrade, Serbia",
title = "The evaluation of mixed Al,Co pillared catalyst in degradation of tartrazine dye in presence of peroxymonosulfate",
pages = "95-96",
url = "https://hdl.handle.net/21.15107/rcub_cer_6282"
}

Ajduković, M., Jović-Jovičić, N., Marinović, S., Stevanović, G., Mudrinić, T., Milutinović Nikolić, A.,& Banković, P.. (2022). The evaluation of mixed Al,Co pillared catalyst in degradation of tartrazine dye in presence of peroxymonosulfate. in Program and the book of abstracts - Serbian Ceramic Society Conference – Advanced Ceramics and Application X, 26-27th September 2022, Belgrade, Serbia
Serbian Ceramic Society., 95-96.
https://hdl.handle.net/21.15107/rcub_cer_6282

Ajduković M, Jović-Jovičić N, Marinović S, Stevanović G, Mudrinić T, Milutinović Nikolić A, Banković P. The evaluation of mixed Al,Co pillared catalyst in degradation of tartrazine dye in presence of peroxymonosulfate. in Program and the book of abstracts - Serbian Ceramic Society Conference – Advanced Ceramics and Application X, 26-27th September 2022, Belgrade, Serbia. 2022;:95-96.
https://hdl.handle.net/21.15107/rcub_cer_6282 .

Ajduković, Marija, Jović-Jovičić, Nataša, Marinović, Sanja, Stevanović, Gordana, Mudrinić, Tihana, Milutinović Nikolić, Aleksandra, Banković, Predrag, "The evaluation of mixed Al,Co pillared catalyst in degradation of tartrazine dye in presence of peroxymonosulfate" in Program and the book of abstracts - Serbian Ceramic Society Conference – Advanced Ceramics and Application X, 26-27th September 2022, Belgrade, Serbia (2022):95-96,
https://hdl.handle.net/21.15107/rcub_cer_6282 .

TY  - CONF
AU  - Ilić, Irena
AU  - Milutinović Nikolić, Aleksandra
AU  - Banković, Predrag
AU  - Ajduković, Marija
AU  - Marinović, Sanja
AU  - Jović-Jovičić, Nataša
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6279
AB  - Kinetic and thermodynamic parameters of nicotine adsorption onto acid-activated standard
Wyoming clay were investigated to obtain the optimum conditions for adsorption. The
nicotine adsorptions were performed in a batch system, using 0.75 mM solution of nicotine,
the mass of adsorbent of 25 mg at native pH=9.26, in temperature range from 25°C – 60 °C.
The pseudo-first (PFO) and pseudo-second kinetics (PSO) models in both linear and nonlinear
forms were apied for experimental data in the temperature range 25 °C – 60 °C. Error
analysis parameters such as correlation coefficient (R2) and  2 (chi-square) have been used to
determine the best kinetics interpretations of adsorption data. The analyzed parameters
suggested that nicotine adsorption can be best described by tested models in the following
order: non-linear PSO = linear PSO >non-linear PFO>linear PFO. The Weber-Morris intraparticle
diffusion model was applied in order to predict the rate-limiting step. The calculated
values for Cid were in the range 0.452 mmol g-1 to 0.484 mmol g-1, indicating effective role of
the boundary layer on the adsorption rate. Thermodynamic study revealed that nicotine
adsorption i\ \]  Q    K\  ¡G°=-18.93 kJ mol-1) physisorpton process with calculated value
of enthalpy change of 4.99 kJ mol-1 and activation energy of 21.95 kJ mol-1.
PB  - Serbian Ceramic Society
C3  - Program and the book of abstracts - Serbian Ceramic Society Conference – Advanced Ceramics and Application X, 26-27th September 2022, Belgrade, Serbia
T1  - Thermodynamic and kinetic study of nicotine adsorption on acid-modified smectite
SP  - 66
EP  - 66
UR  - https://hdl.handle.net/21.15107/rcub_cer_6279
ER  - 

@conference{
author = "Ilić, Irena and Milutinović Nikolić, Aleksandra and Banković, Predrag and Ajduković, Marija and Marinović, Sanja and Jović-Jovičić, Nataša",
year = "2022",
abstract = "Kinetic and thermodynamic parameters of nicotine adsorption onto acid-activated standard
Wyoming clay were investigated to obtain the optimum conditions for adsorption. The
nicotine adsorptions were performed in a batch system, using 0.75 mM solution of nicotine,
the mass of adsorbent of 25 mg at native pH=9.26, in temperature range from 25°C – 60 °C.
The pseudo-first (PFO) and pseudo-second kinetics (PSO) models in both linear and nonlinear
forms were apied for experimental data in the temperature range 25 °C – 60 °C. Error
analysis parameters such as correlation coefficient (R2) and  2 (chi-square) have been used to
determine the best kinetics interpretations of adsorption data. The analyzed parameters
suggested that nicotine adsorption can be best described by tested models in the following
order: non-linear PSO = linear PSO >non-linear PFO>linear PFO. The Weber-Morris intraparticle
diffusion model was applied in order to predict the rate-limiting step. The calculated
values for Cid were in the range 0.452 mmol g-1 to 0.484 mmol g-1, indicating effective role of
the boundary layer on the adsorption rate. Thermodynamic study revealed that nicotine
adsorption i\ \]  Q    K\  ¡G°=-18.93 kJ mol-1) physisorpton process with calculated value
of enthalpy change of 4.99 kJ mol-1 and activation energy of 21.95 kJ mol-1.",
publisher = "Serbian Ceramic Society",
journal = "Program and the book of abstracts - Serbian Ceramic Society Conference – Advanced Ceramics and Application X, 26-27th September 2022, Belgrade, Serbia",
title = "Thermodynamic and kinetic study of nicotine adsorption on acid-modified smectite",
pages = "66-66",
url = "https://hdl.handle.net/21.15107/rcub_cer_6279"
}

Ilić, I., Milutinović Nikolić, A., Banković, P., Ajduković, M., Marinović, S.,& Jović-Jovičić, N.. (2022). Thermodynamic and kinetic study of nicotine adsorption on acid-modified smectite. in Program and the book of abstracts - Serbian Ceramic Society Conference – Advanced Ceramics and Application X, 26-27th September 2022, Belgrade, Serbia
Serbian Ceramic Society., 66-66.
https://hdl.handle.net/21.15107/rcub_cer_6279

Ilić I, Milutinović Nikolić A, Banković P, Ajduković M, Marinović S, Jović-Jovičić N. Thermodynamic and kinetic study of nicotine adsorption on acid-modified smectite. in Program and the book of abstracts - Serbian Ceramic Society Conference – Advanced Ceramics and Application X, 26-27th September 2022, Belgrade, Serbia. 2022;:66-66.
https://hdl.handle.net/21.15107/rcub_cer_6279 .

Ilić, Irena, Milutinović Nikolić, Aleksandra, Banković, Predrag, Ajduković, Marija, Marinović, Sanja, Jović-Jovičić, Nataša, "Thermodynamic and kinetic study of nicotine adsorption on acid-modified smectite" in Program and the book of abstracts - Serbian Ceramic Society Conference – Advanced Ceramics and Application X, 26-27th September 2022, Belgrade, Serbia (2022):66-66,
https://hdl.handle.net/21.15107/rcub_cer_6279 .

TY  - CONF
AU  - Marinović, Sanja
AU  - Mudrinić, Tihana
AU  - Milovanović, Biljana
AU  - Stevanović, Gordana
AU  - Milutinović Nikolić, Aleksandra
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6284
AB  - The 2 μm fraction of Wyoming clay rich in montmorillonite was pillared with aluminum. Obtained pillared clay was impregnated with different cobalt loadings using the incipient wetness impregnation method followed by calcination at 450 °C. The obtained materials were previously fully characterized. The synthesized materials were investigated as catalysts in catalytic oxidation of organic water pollutant, tartrazine, in the presence of Oxone®. Oxone® was a precursor of sulfate anion radicals. The effect of the different cobalt loadings on the reaction kinetics was investigated. The pseudo-first order kinetic model was found to be the most appropriate to fit the experimental data of all investigated catalysts under defined experimental conditions. The presence of Co3O4 as defined crystalline phase reduces the efficiency of cobalt-supported aluminum pillared clay in Oxone® activation and consequently oxidative tartrazine degradation.
PB  - Society of Physical Chemists of Serbia
C3  - Proceedings - 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2022, September, 26-30, 2022, Belgrade, Serbia
T1  - Effect of different cobalt loadings on the kinetic performance of cobalt-supported aluminum pillared clay towards tartrazine degradation
VL  - I
SP  - 165
EP  - 168
UR  - https://hdl.handle.net/21.15107/rcub_cer_6284
ER  - 

@conference{
author = "Marinović, Sanja and Mudrinić, Tihana and Milovanović, Biljana and Stevanović, Gordana and Milutinović Nikolić, Aleksandra",
year = "2022",
abstract = "The 2 μm fraction of Wyoming clay rich in montmorillonite was pillared with aluminum. Obtained pillared clay was impregnated with different cobalt loadings using the incipient wetness impregnation method followed by calcination at 450 °C. The obtained materials were previously fully characterized. The synthesized materials were investigated as catalysts in catalytic oxidation of organic water pollutant, tartrazine, in the presence of Oxone®. Oxone® was a precursor of sulfate anion radicals. The effect of the different cobalt loadings on the reaction kinetics was investigated. The pseudo-first order kinetic model was found to be the most appropriate to fit the experimental data of all investigated catalysts under defined experimental conditions. The presence of Co3O4 as defined crystalline phase reduces the efficiency of cobalt-supported aluminum pillared clay in Oxone® activation and consequently oxidative tartrazine degradation.",
publisher = "Society of Physical Chemists of Serbia",
journal = "Proceedings - 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2022, September, 26-30, 2022, Belgrade, Serbia",
title = "Effect of different cobalt loadings on the kinetic performance of cobalt-supported aluminum pillared clay towards tartrazine degradation",
volume = "I",
pages = "165-168",
url = "https://hdl.handle.net/21.15107/rcub_cer_6284"
}

Marinović, S., Mudrinić, T., Milovanović, B., Stevanović, G.,& Milutinović Nikolić, A.. (2022). Effect of different cobalt loadings on the kinetic performance of cobalt-supported aluminum pillared clay towards tartrazine degradation. in Proceedings - 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2022, September, 26-30, 2022, Belgrade, Serbia
Society of Physical Chemists of Serbia., I, 165-168.
https://hdl.handle.net/21.15107/rcub_cer_6284

Marinović S, Mudrinić T, Milovanović B, Stevanović G, Milutinović Nikolić A. Effect of different cobalt loadings on the kinetic performance of cobalt-supported aluminum pillared clay towards tartrazine degradation. in Proceedings - 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2022, September, 26-30, 2022, Belgrade, Serbia. 2022;I:165-168.
https://hdl.handle.net/21.15107/rcub_cer_6284 .

Marinović, Sanja, Mudrinić, Tihana, Milovanović, Biljana, Stevanović, Gordana, Milutinović Nikolić, Aleksandra, "Effect of different cobalt loadings on the kinetic performance of cobalt-supported aluminum pillared clay towards tartrazine degradation" in Proceedings - 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2022, September, 26-30, 2022, Belgrade, Serbia, I (2022):165-168,
https://hdl.handle.net/21.15107/rcub_cer_6284 .

TY  - CONF
AU  - Milovanović, Biljana
AU  - Marinović, Sanja
AU  - Milutinović Nikolić, Aleksandra
AU  - Petrović, Rada
AU  - Stevanović, Gordana
AU  - Banković, Predrag
AU  - Mudrinić, Tihana
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6281
AB  - Our previous study demonstrated that cobalt content strongly affected the electro-activity of
aluminum pillared clay-supported cobalt (CoAP) toward glucose oxidation. It was found that
the electro-activity of CoAP increased with the increase of cobalt loading. However, at the 10
wt.% of cobalt content, the electro-activity significantly decreased. In the present study, the
focus is on the investigation of the nature of the surface sites that might cause the difference
in the electro-activity of CoAP. For this purpose, CoAP with 3 wt.% and 10 wt.% cobalt
contents (x%CoAP, x=3 and 10) were characterized using FE-SEM and HR-TEM with EDX
techniques, and XPS. The microscopic techniques coupled with EDX have shown that cobalt
oxide nanoparticles were evenly distributed in both samples. However, the higher cobalt
loading resulted in cobalt oxide agglomeration that led to larger particle sizes. The results of
XPS confirmed the presence of Co (II) in the 3%CoAP. On the other hand, the presence of
Co3O4 which contains both Co (II) and Co (III) was confirmed in 10%CoAP. It is clear from
this study that the electro-activity of CoAP strongly depends on the oxidation state of cobalt.
However, the effect of agglomeration and cobalt oxide particle sizes cannot be ruled out.
PB  - Serbian Ceramic Society
C3  - Program and the book of abstracts - Serbian Ceramic Society Conference – Advanced Ceramics and Application X, 26-27th September 2022, Belgrade, Serbia
T1  - Surface characterization of aluminum pillared clay-supported cobalt
SP  - 68
EP  - 68
UR  - https://hdl.handle.net/21.15107/rcub_cer_6281
ER  - 

@conference{
author = "Milovanović, Biljana and Marinović, Sanja and Milutinović Nikolić, Aleksandra and Petrović, Rada and Stevanović, Gordana and Banković, Predrag and Mudrinić, Tihana",
year = "2022",
abstract = "Our previous study demonstrated that cobalt content strongly affected the electro-activity of
aluminum pillared clay-supported cobalt (CoAP) toward glucose oxidation. It was found that
the electro-activity of CoAP increased with the increase of cobalt loading. However, at the 10
wt.% of cobalt content, the electro-activity significantly decreased. In the present study, the
focus is on the investigation of the nature of the surface sites that might cause the difference
in the electro-activity of CoAP. For this purpose, CoAP with 3 wt.% and 10 wt.% cobalt
contents (x%CoAP, x=3 and 10) were characterized using FE-SEM and HR-TEM with EDX
techniques, and XPS. The microscopic techniques coupled with EDX have shown that cobalt
oxide nanoparticles were evenly distributed in both samples. However, the higher cobalt
loading resulted in cobalt oxide agglomeration that led to larger particle sizes. The results of
XPS confirmed the presence of Co (II) in the 3%CoAP. On the other hand, the presence of
Co3O4 which contains both Co (II) and Co (III) was confirmed in 10%CoAP. It is clear from
this study that the electro-activity of CoAP strongly depends on the oxidation state of cobalt.
However, the effect of agglomeration and cobalt oxide particle sizes cannot be ruled out.",
publisher = "Serbian Ceramic Society",
journal = "Program and the book of abstracts - Serbian Ceramic Society Conference – Advanced Ceramics and Application X, 26-27th September 2022, Belgrade, Serbia",
title = "Surface characterization of aluminum pillared clay-supported cobalt",
pages = "68-68",
url = "https://hdl.handle.net/21.15107/rcub_cer_6281"
}

Milovanović, B., Marinović, S., Milutinović Nikolić, A., Petrović, R., Stevanović, G., Banković, P.,& Mudrinić, T.. (2022). Surface characterization of aluminum pillared clay-supported cobalt. in Program and the book of abstracts - Serbian Ceramic Society Conference – Advanced Ceramics and Application X, 26-27th September 2022, Belgrade, Serbia
Serbian Ceramic Society., 68-68.
https://hdl.handle.net/21.15107/rcub_cer_6281

Milovanović B, Marinović S, Milutinović Nikolić A, Petrović R, Stevanović G, Banković P, Mudrinić T. Surface characterization of aluminum pillared clay-supported cobalt. in Program and the book of abstracts - Serbian Ceramic Society Conference – Advanced Ceramics and Application X, 26-27th September 2022, Belgrade, Serbia. 2022;:68-68.
https://hdl.handle.net/21.15107/rcub_cer_6281 .

Milovanović, Biljana, Marinović, Sanja, Milutinović Nikolić, Aleksandra, Petrović, Rada, Stevanović, Gordana, Banković, Predrag, Mudrinić, Tihana, "Surface characterization of aluminum pillared clay-supported cobalt" in Program and the book of abstracts - Serbian Ceramic Society Conference – Advanced Ceramics and Application X, 26-27th September 2022, Belgrade, Serbia (2022):68-68,
https://hdl.handle.net/21.15107/rcub_cer_6281 .

TY  - JOUR
AU  - Marinović, Sanja
AU  - Mudrinić, Tihana
AU  - Milovanović, Biljana
AU  - Jović-Jovičić, Nataša
AU  - Ajduković, Marija
AU  - Banković, Predrag
AU  - Milutinović Nikolić, Aleksandra
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5569
AB  - A series of aluminum pillared montmorillonite impregnated with different cobalt loadings (1–10) mass% were investigated as catalysts in oxidative degradation of organic water pollutant, model azo dye (tartrazine), in the presence of Oxone®. Oxone® has potassium monopersulfate as an active component which is a precursor of sulfate anion radicals. With the increase of cobalt loading up to 4 mass% the efficiency of catalysts increased. The catalytic tests revealed that the sample impregnated with 4 mass% of cobalt had the best catalytic activity within investigated series. The presence of a new cobalt-containing phase was identified in samples impregnated with 5 mass% and 10 mass% of cobalt. This finding indicated that although these samples had a higher content of catalytically active component i.e., cobalt, the presence of a new cobalt phase was less favorable for Oxone® activation and formation of sulfate anion radicals. The effect of the different cobalt loading on the reaction kinetics was investigated. The pseudo-first-order kinetic model was found to be the most appropriate to fit the experimental data for all investigated catalysts under defined experimental conditions. Both decolorization and degradation of aryl moieties had the highest pseudo-first-order rate constant for catalyst impregnated with 4 mass% of cobalt.
PB  - Springer
T2  - Reaction Kinetics, Mechanisms and Catalysis
T1  - The influence of cobalt loading in cobalt-supported aluminum pillared montmorillonite on the kinetic of Oxone® activated oxidative degradation of tartrazine
DO  - 10.1007/s11144-022-02338-z
ER  - 

@article{
author = "Marinović, Sanja and Mudrinić, Tihana and Milovanović, Biljana and Jović-Jovičić, Nataša and Ajduković, Marija and Banković, Predrag and Milutinović Nikolić, Aleksandra",
year = "2022",
abstract = "A series of aluminum pillared montmorillonite impregnated with different cobalt loadings (1–10) mass% were investigated as catalysts in oxidative degradation of organic water pollutant, model azo dye (tartrazine), in the presence of Oxone®. Oxone® has potassium monopersulfate as an active component which is a precursor of sulfate anion radicals. With the increase of cobalt loading up to 4 mass% the efficiency of catalysts increased. The catalytic tests revealed that the sample impregnated with 4 mass% of cobalt had the best catalytic activity within investigated series. The presence of a new cobalt-containing phase was identified in samples impregnated with 5 mass% and 10 mass% of cobalt. This finding indicated that although these samples had a higher content of catalytically active component i.e., cobalt, the presence of a new cobalt phase was less favorable for Oxone® activation and formation of sulfate anion radicals. The effect of the different cobalt loading on the reaction kinetics was investigated. The pseudo-first-order kinetic model was found to be the most appropriate to fit the experimental data for all investigated catalysts under defined experimental conditions. Both decolorization and degradation of aryl moieties had the highest pseudo-first-order rate constant for catalyst impregnated with 4 mass% of cobalt.",
publisher = "Springer",
journal = "Reaction Kinetics, Mechanisms and Catalysis",
title = "The influence of cobalt loading in cobalt-supported aluminum pillared montmorillonite on the kinetic of Oxone® activated oxidative degradation of tartrazine",
doi = "10.1007/s11144-022-02338-z"
}

Marinović, S., Mudrinić, T., Milovanović, B., Jović-Jovičić, N., Ajduković, M., Banković, P.,& Milutinović Nikolić, A.. (2022). The influence of cobalt loading in cobalt-supported aluminum pillared montmorillonite on the kinetic of Oxone® activated oxidative degradation of tartrazine. in Reaction Kinetics, Mechanisms and Catalysis
Springer..
https://doi.org/10.1007/s11144-022-02338-z

Marinović S, Mudrinić T, Milovanović B, Jović-Jovičić N, Ajduković M, Banković P, Milutinović Nikolić A. The influence of cobalt loading in cobalt-supported aluminum pillared montmorillonite on the kinetic of Oxone® activated oxidative degradation of tartrazine. in Reaction Kinetics, Mechanisms and Catalysis. 2022;.
doi:10.1007/s11144-022-02338-z .

Marinović, Sanja, Mudrinić, Tihana, Milovanović, Biljana, Jović-Jovičić, Nataša, Ajduković, Marija, Banković, Predrag, Milutinović Nikolić, Aleksandra, "The influence of cobalt loading in cobalt-supported aluminum pillared montmorillonite on the kinetic of Oxone® activated oxidative degradation of tartrazine" in Reaction Kinetics, Mechanisms and Catalysis (2022),
https://doi.org/10.1007/s11144-022-02338-z . .

TY  - JOUR
AU  - Ajduković, Marija
AU  - Jović-Jovičić, Nataša
AU  - Milutinović Nikolić, Aleksandra
AU  - Banković, Predrag
AU  - Mojović, Zorica
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5516
AB  - Glina bogata monmorijonitom iz Vajominga je modifikovana kiselom aktivacijom i procesom pilarenja.
Ovako izmenjena glina, kao i polazna glina, je naneta na površinu elektrode od staklatog ugljenika 
pomoću Nafiona. Aktivnost ovih elektroda je ispitana na primeru redoks para hinon/hidrohinon (Q/QH2)
u puferovanom i nepuferovanm rastvoru. Način modifikacije glina je uticao na aktivnost elektroda i 
mehanizam redoks rekacije
AB  - Montmorillonite originated from Wyoming was modified by acid activation and aluminum pillaring process. The samples of clay obtained in this manner, as well as starting clay, were applied at the surface of a glassy carbon electrode by the means of Nafion. The activity of these electrodes was investigated on the redox couple quinone/hydroquinone (Q/QH2) in buffered and unbuffered solutions. The type of clay modification influenced the activity of the electrodes and the mechanism of the redox reaction.
PB  - Савез инжењера и техничара Србије
T2  - Tehnika
T1  - Uticaj modifikacije gline na elektrohemijsko ponašanje hinhidrona
T1  - The influence of clay modification on electrochemical behavior of quinhydrone
VL  - 77
IS  - 1
SP  - 9
EP  - 14
DO  - 10.5937/tehnika2201009A
ER  - 

@article{
author = "Ajduković, Marija and Jović-Jovičić, Nataša and Milutinović Nikolić, Aleksandra and Banković, Predrag and Mojović, Zorica",
year = "2022",
abstract = "Glina bogata monmorijonitom iz Vajominga je modifikovana kiselom aktivacijom i procesom pilarenja.
Ovako izmenjena glina, kao i polazna glina, je naneta na površinu elektrode od staklatog ugljenika 
pomoću Nafiona. Aktivnost ovih elektroda je ispitana na primeru redoks para hinon/hidrohinon (Q/QH2)
u puferovanom i nepuferovanm rastvoru. Način modifikacije glina je uticao na aktivnost elektroda i 
mehanizam redoks rekacije, Montmorillonite originated from Wyoming was modified by acid activation and aluminum pillaring process. The samples of clay obtained in this manner, as well as starting clay, were applied at the surface of a glassy carbon electrode by the means of Nafion. The activity of these electrodes was investigated on the redox couple quinone/hydroquinone (Q/QH2) in buffered and unbuffered solutions. The type of clay modification influenced the activity of the electrodes and the mechanism of the redox reaction.",
publisher = "Савез инжењера и техничара Србије",
journal = "Tehnika",
title = "Uticaj modifikacije gline na elektrohemijsko ponašanje hinhidrona, The influence of clay modification on electrochemical behavior of quinhydrone",
volume = "77",
number = "1",
pages = "9-14",
doi = "10.5937/tehnika2201009A"
}

Ajduković, M., Jović-Jovičić, N., Milutinović Nikolić, A., Banković, P.,& Mojović, Z.. (2022). Uticaj modifikacije gline na elektrohemijsko ponašanje hinhidrona. in Tehnika
Савез инжењера и техничара Србије., 77(1), 9-14.
https://doi.org/10.5937/tehnika2201009A

Ajduković M, Jović-Jovičić N, Milutinović Nikolić A, Banković P, Mojović Z. Uticaj modifikacije gline na elektrohemijsko ponašanje hinhidrona. in Tehnika. 2022;77(1):9-14.
doi:10.5937/tehnika2201009A .

Ajduković, Marija, Jović-Jovičić, Nataša, Milutinović Nikolić, Aleksandra, Banković, Predrag, Mojović, Zorica, "Uticaj modifikacije gline na elektrohemijsko ponašanje hinhidrona" in Tehnika, 77, no. 1 (2022):9-14,
https://doi.org/10.5937/tehnika2201009A . .

TY  - CONF
AU  - Stevanović, Gordana
AU  - Jović-Jovičić, Nataša
AU  - Milutinović Nikolić, Aleksandra
AU  - Banković, Predrag
AU  - Pavlović, Stefan
AU  - Marinović, Sanja
AU  - Ajduković, Marija
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5306
AB  - Catalytic advanced oxidative degradation of organic pollutants in water is a promising technique for the purification of industrial effluents. Cobalt-based catalysts wa proven to be very efficient in peroxymonosulfate activation and generation of SO4•− radicals, species with high oxidative potential [1]. This work, for the first time, reports the hydrothermal procedure in the synthesis of cobalt-containing chitosan-derived carbon-smectite catalyst. The obtained catalyst was used for activation of Oxone® (potassium peroxymonosulfate). Activated Oxone® was applied in catalytic degradation of toxic textile dye - Orange G dye, that was used as a model of the water pollutant. Based on the presented results, the catalyst can be considered as an eco-friendly catalyst that was evaluated as highly efficient in the process of the oxidative degradation of selected organic dye, and potentially for a variety of water pollutants.
C3  - 2nd International Conference On Green Energy And Environmental Technology
T1  - Evaluation of hydrothermally synthesized green Co-carbon-smectite catalyst for oxidative degradation of dye in the presence of Oxone ®
SP  - 29
UR  - https://hdl.handle.net/21.15107/rcub_cer_5306
ER  - 

@conference{
author = "Stevanović, Gordana and Jović-Jovičić, Nataša and Milutinović Nikolić, Aleksandra and Banković, Predrag and Pavlović, Stefan and Marinović, Sanja and Ajduković, Marija",
year = "2022",
abstract = "Catalytic advanced oxidative degradation of organic pollutants in water is a promising technique for the purification of industrial effluents. Cobalt-based catalysts wa proven to be very efficient in peroxymonosulfate activation and generation of SO4•− radicals, species with high oxidative potential [1]. This work, for the first time, reports the hydrothermal procedure in the synthesis of cobalt-containing chitosan-derived carbon-smectite catalyst. The obtained catalyst was used for activation of Oxone® (potassium peroxymonosulfate). Activated Oxone® was applied in catalytic degradation of toxic textile dye - Orange G dye, that was used as a model of the water pollutant. Based on the presented results, the catalyst can be considered as an eco-friendly catalyst that was evaluated as highly efficient in the process of the oxidative degradation of selected organic dye, and potentially for a variety of water pollutants.",
journal = "2nd International Conference On Green Energy And Environmental Technology",
title = "Evaluation of hydrothermally synthesized green Co-carbon-smectite catalyst for oxidative degradation of dye in the presence of Oxone ®",
pages = "29",
url = "https://hdl.handle.net/21.15107/rcub_cer_5306"
}

Stevanović, G., Jović-Jovičić, N., Milutinović Nikolić, A., Banković, P., Pavlović, S., Marinović, S.,& Ajduković, M.. (2022). Evaluation of hydrothermally synthesized green Co-carbon-smectite catalyst for oxidative degradation of dye in the presence of Oxone ®. in 2nd International Conference On Green Energy And Environmental Technology, 29.
https://hdl.handle.net/21.15107/rcub_cer_5306

Stevanović G, Jović-Jovičić N, Milutinović Nikolić A, Banković P, Pavlović S, Marinović S, Ajduković M. Evaluation of hydrothermally synthesized green Co-carbon-smectite catalyst for oxidative degradation of dye in the presence of Oxone ®. in 2nd International Conference On Green Energy And Environmental Technology. 2022;:29.
https://hdl.handle.net/21.15107/rcub_cer_5306 .

Stevanović, Gordana, Jović-Jovičić, Nataša, Milutinović Nikolić, Aleksandra, Banković, Predrag, Pavlović, Stefan, Marinović, Sanja, Ajduković, Marija, "Evaluation of hydrothermally synthesized green Co-carbon-smectite catalyst for oxidative degradation of dye in the presence of Oxone ®" in 2nd International Conference On Green Energy And Environmental Technology (2022):29,
https://hdl.handle.net/21.15107/rcub_cer_5306 .

TY  - CONF
AU  - Mudrinić, Tihana
AU  - Milovanović, Biljana
AU  - Petrović, Srđan
AU  - Pavlović, Stefan
AU  - Banković, Predrag
AU  - Milutinović Nikolić, Aleksandra
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5305
AB  - Recently the focus of electrochemical glucose sensing is on the fabrication of enzyme-free electrodes based on non-precious transition metal oxides, especially cobalt oxide [1]. To our best knowledge, these materials were primarily prepared by conventional methods using solutions, while the solvent-free mechanochemical approach was scarcely reported. Therefore, in this work Co3O4 supported on alumina (Co3O4/Al2O3) were prepared by ball milling using different milling times (0.5, 1, and 2 h) and Co3O4 contents (4, 8, and 16 wt. %). Ball to powder ratio was 30:1 and the rotation speed was 300 rpm. The electrodes based on the synthesized material were prepared in the form of a carbon paste electrodes (CP-Co3O4/Al2O3). The particle size distribution, phase, and chemical composition of the obtained materials were determined using LDPSA, XRPD, and XRF, respectively. The electrochemical performance of the CP-Co3O4/A12O3 electrode was tested in an alkaline solution containing glucose using cyclovoltammetry (CV) and chronoamperometry (ChA). CV revealed that milling time affected the electrochemical response. The highest current response was obtained with material milled for 1 h. Both ChA and CV confirmed that the electrochemical performance was further improved by increasing cobalt content. The CP electrode-based mechanochemically prepared samples showed enhanced performance in comparison to hand mixed Co3O4 and alumina. The beneficial effect of ball milling was attributed to the high dispersion of cobalt oxides over alumina even for large cobalt loadings without agglomeration. The obtained experimental results proved that the solvent-free mechanochemical approach is a promising synthetic route for obtaining green and sustainable glucose-sensing material for the fourth generation.
PB  - Calgary, Italy :  University of Cagliari
PB  - COST Action CA18112
C3  - Book of abstracts - 10th International Conference on Mechanochemistry and Mechanical Alloying
T1  - Mechanochemical approach for non-enzymatic sensing materials
UR  - https://hdl.handle.net/21.15107/rcub_cer_5305
ER  - 

@conference{
author = "Mudrinić, Tihana and Milovanović, Biljana and Petrović, Srđan and Pavlović, Stefan and Banković, Predrag and Milutinović Nikolić, Aleksandra",
year = "2022",
abstract = "Recently the focus of electrochemical glucose sensing is on the fabrication of enzyme-free electrodes based on non-precious transition metal oxides, especially cobalt oxide [1]. To our best knowledge, these materials were primarily prepared by conventional methods using solutions, while the solvent-free mechanochemical approach was scarcely reported. Therefore, in this work Co3O4 supported on alumina (Co3O4/Al2O3) were prepared by ball milling using different milling times (0.5, 1, and 2 h) and Co3O4 contents (4, 8, and 16 wt. %). Ball to powder ratio was 30:1 and the rotation speed was 300 rpm. The electrodes based on the synthesized material were prepared in the form of a carbon paste electrodes (CP-Co3O4/Al2O3). The particle size distribution, phase, and chemical composition of the obtained materials were determined using LDPSA, XRPD, and XRF, respectively. The electrochemical performance of the CP-Co3O4/A12O3 electrode was tested in an alkaline solution containing glucose using cyclovoltammetry (CV) and chronoamperometry (ChA). CV revealed that milling time affected the electrochemical response. The highest current response was obtained with material milled for 1 h. Both ChA and CV confirmed that the electrochemical performance was further improved by increasing cobalt content. The CP electrode-based mechanochemically prepared samples showed enhanced performance in comparison to hand mixed Co3O4 and alumina. The beneficial effect of ball milling was attributed to the high dispersion of cobalt oxides over alumina even for large cobalt loadings without agglomeration. The obtained experimental results proved that the solvent-free mechanochemical approach is a promising synthetic route for obtaining green and sustainable glucose-sensing material for the fourth generation.",
publisher = "Calgary, Italy :  University of Cagliari, COST Action CA18112",
journal = "Book of abstracts - 10th International Conference on Mechanochemistry and Mechanical Alloying",
title = "Mechanochemical approach for non-enzymatic sensing materials",
url = "https://hdl.handle.net/21.15107/rcub_cer_5305"
}

Mudrinić, T., Milovanović, B., Petrović, S., Pavlović, S., Banković, P.,& Milutinović Nikolić, A.. (2022). Mechanochemical approach for non-enzymatic sensing materials. in Book of abstracts - 10th International Conference on Mechanochemistry and Mechanical Alloying
Calgary, Italy :  University of Cagliari..
https://hdl.handle.net/21.15107/rcub_cer_5305

Mudrinić T, Milovanović B, Petrović S, Pavlović S, Banković P, Milutinović Nikolić A. Mechanochemical approach for non-enzymatic sensing materials. in Book of abstracts - 10th International Conference on Mechanochemistry and Mechanical Alloying. 2022;.
https://hdl.handle.net/21.15107/rcub_cer_5305 .

Mudrinić, Tihana, Milovanović, Biljana, Petrović, Srđan, Pavlović, Stefan, Banković, Predrag, Milutinović Nikolić, Aleksandra, "Mechanochemical approach for non-enzymatic sensing materials" in Book of abstracts - 10th International Conference on Mechanochemistry and Mechanical Alloying (2022),
https://hdl.handle.net/21.15107/rcub_cer_5305 .

TY  - JOUR
AU  - Milovanović, Biljana
AU  - Marinović, Sanja
AU  - Vuković, Zorica
AU  - Milutinović Nikolić, Aleksandra
AU  - Petrović, Rada
AU  - Banković, Predrag
AU  - Mudrinić, Tihana
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5246
AB  - In this paper, the influence of cobalt loading in pillared clay-supported cobalt materials on their electrocatalytic performance toward glucose oxidation was investigated. A series of aluminum-pillared montmorillonite clay (AP) materials with different cobalt loadings (x%CoAP, x = 1, 3, 5, and 10 wt%) was synthesized using the incipient wetness impregnation method. The X-ray powder diffraction (XRPD), inductively coupled plasma optical emission spectroscopy (ICP-OES), Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy coupled with energy dispersive X-ray spectrometry (FE-SEM/EDX), high resolution transmission electron microscopy (HR-TEM) coupled with EDX, X-ray photoelectron spectroscopy (XPS), and low temperature N2 physisorption, were employed for characterization of the materials. The incorporation of cobalt in porous structure of pillared montmorillonite was confirmed. The synthesized materials (x%CoAP) were used for modification of carbon paste (CP) electrode and tested in reaction of glucose electrooxidation. The electrochemical measurements were conducted using cyclic voltammetry and chronoamperometry in a 1 M NaOH solution, with or without glucose. The results showed that the increase of cobalt loading improved the electrode performance toward glucose. The highest current response and sensitivity were obtained for the CP-5%CoAP electrode. A lower electrode performance of CP-10%CoAP was correlated with the presence of higher quantities of Co3O4 (confirmed by XRPD and XPS) in the electrode material. The mechanism and kinetics of glucose electrooxidation was studied in more details for the best performing electrode (CP-5%CoAP). It was found that the process was diffusion-controlled and the diffusion coefficient was determined. The charge transfer coefficient and catalytic rate constant were calculated. The electrode exhibited satisfactory repeatability, reproducibility, stability, and selectivity. The obtained results showed that appropriate amount of cobalt loading in pillared clay led to the obtainment of non-enzymatic electrode materials suitable for sustainable and green glucose sensors.
PB  - Elsevier
T2  - Journal of Electroanalytical Chemistry
T1  - The influence of cobalt loading on electrocatalytic performance toward glucose oxidation of pillared montmorillonite-supported cobalt
VL  - 915
SP  - 116332
DO  - 10.1016/j.jelechem.2022.116332
ER  - 

@article{
author = "Milovanović, Biljana and Marinović, Sanja and Vuković, Zorica and Milutinović Nikolić, Aleksandra and Petrović, Rada and Banković, Predrag and Mudrinić, Tihana",
year = "2022",
abstract = "In this paper, the influence of cobalt loading in pillared clay-supported cobalt materials on their electrocatalytic performance toward glucose oxidation was investigated. A series of aluminum-pillared montmorillonite clay (AP) materials with different cobalt loadings (x%CoAP, x = 1, 3, 5, and 10 wt%) was synthesized using the incipient wetness impregnation method. The X-ray powder diffraction (XRPD), inductively coupled plasma optical emission spectroscopy (ICP-OES), Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy coupled with energy dispersive X-ray spectrometry (FE-SEM/EDX), high resolution transmission electron microscopy (HR-TEM) coupled with EDX, X-ray photoelectron spectroscopy (XPS), and low temperature N2 physisorption, were employed for characterization of the materials. The incorporation of cobalt in porous structure of pillared montmorillonite was confirmed. The synthesized materials (x%CoAP) were used for modification of carbon paste (CP) electrode and tested in reaction of glucose electrooxidation. The electrochemical measurements were conducted using cyclic voltammetry and chronoamperometry in a 1 M NaOH solution, with or without glucose. The results showed that the increase of cobalt loading improved the electrode performance toward glucose. The highest current response and sensitivity were obtained for the CP-5%CoAP electrode. A lower electrode performance of CP-10%CoAP was correlated with the presence of higher quantities of Co3O4 (confirmed by XRPD and XPS) in the electrode material. The mechanism and kinetics of glucose electrooxidation was studied in more details for the best performing electrode (CP-5%CoAP). It was found that the process was diffusion-controlled and the diffusion coefficient was determined. The charge transfer coefficient and catalytic rate constant were calculated. The electrode exhibited satisfactory repeatability, reproducibility, stability, and selectivity. The obtained results showed that appropriate amount of cobalt loading in pillared clay led to the obtainment of non-enzymatic electrode materials suitable for sustainable and green glucose sensors.",
publisher = "Elsevier",
journal = "Journal of Electroanalytical Chemistry",
title = "The influence of cobalt loading on electrocatalytic performance toward glucose oxidation of pillared montmorillonite-supported cobalt",
volume = "915",
pages = "116332",
doi = "10.1016/j.jelechem.2022.116332"
}

Milovanović, B., Marinović, S., Vuković, Z., Milutinović Nikolić, A., Petrović, R., Banković, P.,& Mudrinić, T.. (2022). The influence of cobalt loading on electrocatalytic performance toward glucose oxidation of pillared montmorillonite-supported cobalt. in Journal of Electroanalytical Chemistry
Elsevier., 915, 116332.
https://doi.org/10.1016/j.jelechem.2022.116332

Milovanović B, Marinović S, Vuković Z, Milutinović Nikolić A, Petrović R, Banković P, Mudrinić T. The influence of cobalt loading on electrocatalytic performance toward glucose oxidation of pillared montmorillonite-supported cobalt. in Journal of Electroanalytical Chemistry. 2022;915:116332.
doi:10.1016/j.jelechem.2022.116332 .

Milovanović, Biljana, Marinović, Sanja, Vuković, Zorica, Milutinović Nikolić, Aleksandra, Petrović, Rada, Banković, Predrag, Mudrinić, Tihana, "The influence of cobalt loading on electrocatalytic performance toward glucose oxidation of pillared montmorillonite-supported cobalt" in Journal of Electroanalytical Chemistry, 915 (2022):116332,
https://doi.org/10.1016/j.jelechem.2022.116332 . .