TY  - CONF
AU  - Kostić, Milan
AU  - Đorđević, Biljana
AU  - Pavlović, Stefan
AU  - Miladinović, Marija R.
AU  - Stamenković, Olivera
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7352
AB  - The investigation of reaction kinetics is crucial for practical implications in process equipment design and scaling up. In this study, a kinetic analysis of the methanolysis of a blend of radish and castor oil catalyzed by calcium oxide was carried out. The objectives were to propose a comprehensive model for describing the kinetics of this methanolysis reaction and determine its activation energy. The methanolysis was conducted in a batch reactor under atmospheric pressure with the following reaction conditions: a radish-to-castor oil blend mass ratio of 1:1, a methanol-to-oil molar ratio of 12:1, a catalyst amount of 5% of the oil blend weight, and reaction temperatures of 
30 C, 45 C, and 60 C. The model involving the changing reaction mechanism and the triacylglycerol (TAG) mass transfer limitation was first simplified to a pseudo-first order model regarding TAGs and fatty acid methyl esters, which was then used to calculate the apparent reaction rate constant. A good agreement between the calculated and experimental values of the TAG conversion degree was proved by a low mean relative percentage deviation of ±6.1% (based on 66 data), thus validating the applied simple kinetic model. A positive effect of the reaction temperature on the apparent reaction rate constant was observed. Using the Arrhenius equation, the activation energy of methanolysis was determined to be 46.12 kJ/mol. The obtained value of activation energy is much lower than values of activation energy determined for the calcium oxide-catalyzed methanolysis of single oil feedstocks, such as soybean, canola, Jatropha, and waste frying oils. The lower activation energy suggests the potential for enhanced efficiency and feasibility of utilizing this blend as a feedstock for biodiesel production compared to the individual oily feedstocks previously studied.
PB  - Leskovac : Faculty of Technology
C3  - Book of abstracts - 15th international symposium „Novel technologies and sustainable development“,  October, 20-21, 2023, Leskovac, Serbia
T1  - Kinetic modeling of the biodiesel production from sunflower oil over corn cob ash
SP  - 129
EP  - 130
UR  - https://hdl.handle.net/21.15107/rcub_cer_7352
ER  - 

@conference{
author = "Kostić, Milan and Đorđević, Biljana and Pavlović, Stefan and Miladinović, Marija R. and Stamenković, Olivera",
year = "2023",
abstract = "The investigation of reaction kinetics is crucial for practical implications in process equipment design and scaling up. In this study, a kinetic analysis of the methanolysis of a blend of radish and castor oil catalyzed by calcium oxide was carried out. The objectives were to propose a comprehensive model for describing the kinetics of this methanolysis reaction and determine its activation energy. The methanolysis was conducted in a batch reactor under atmospheric pressure with the following reaction conditions: a radish-to-castor oil blend mass ratio of 1:1, a methanol-to-oil molar ratio of 12:1, a catalyst amount of 5% of the oil blend weight, and reaction temperatures of 
30 C, 45 C, and 60 C. The model involving the changing reaction mechanism and the triacylglycerol (TAG) mass transfer limitation was first simplified to a pseudo-first order model regarding TAGs and fatty acid methyl esters, which was then used to calculate the apparent reaction rate constant. A good agreement between the calculated and experimental values of the TAG conversion degree was proved by a low mean relative percentage deviation of ±6.1% (based on 66 data), thus validating the applied simple kinetic model. A positive effect of the reaction temperature on the apparent reaction rate constant was observed. Using the Arrhenius equation, the activation energy of methanolysis was determined to be 46.12 kJ/mol. The obtained value of activation energy is much lower than values of activation energy determined for the calcium oxide-catalyzed methanolysis of single oil feedstocks, such as soybean, canola, Jatropha, and waste frying oils. The lower activation energy suggests the potential for enhanced efficiency and feasibility of utilizing this blend as a feedstock for biodiesel production compared to the individual oily feedstocks previously studied.",
publisher = "Leskovac : Faculty of Technology",
journal = "Book of abstracts - 15th international symposium „Novel technologies and sustainable development“,  October, 20-21, 2023, Leskovac, Serbia",
title = "Kinetic modeling of the biodiesel production from sunflower oil over corn cob ash",
pages = "129-130",
url = "https://hdl.handle.net/21.15107/rcub_cer_7352"
}

Kostić, M., Đorđević, B., Pavlović, S., Miladinović, M. R.,& Stamenković, O.. (2023). Kinetic modeling of the biodiesel production from sunflower oil over corn cob ash. in Book of abstracts - 15th international symposium „Novel technologies and sustainable development“,  October, 20-21, 2023, Leskovac, Serbia
Leskovac : Faculty of Technology., 129-130.
https://hdl.handle.net/21.15107/rcub_cer_7352

Kostić M, Đorđević B, Pavlović S, Miladinović MR, Stamenković O. Kinetic modeling of the biodiesel production from sunflower oil over corn cob ash. in Book of abstracts - 15th international symposium „Novel technologies and sustainable development“,  October, 20-21, 2023, Leskovac, Serbia. 2023;:129-130.
https://hdl.handle.net/21.15107/rcub_cer_7352 .

Kostić, Milan, Đorđević, Biljana, Pavlović, Stefan, Miladinović, Marija R., Stamenković, Olivera, "Kinetic modeling of the biodiesel production from sunflower oil over corn cob ash" in Book of abstracts - 15th international symposium „Novel technologies and sustainable development“,  October, 20-21, 2023, Leskovac, Serbia (2023):129-130,
https://hdl.handle.net/21.15107/rcub_cer_7352 .

TY  - CONF
AU  - Đorđević, Biljana
AU  - Pavlović, Stefan
AU  - Kostić, Milan
AU  - Stamenković, Olivera
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7353
AB  - Waste plum kernels from the fruit processing industry might be a valuable oil source  for biodiesel production which use can reduce the biodiesel production cost. The  application of green cosolvents, like deep eutectic solvents (DESs), in the alcoholysis  reaction can improve the oil conversion rate. This study reports on the optimization the plum kernel oil methanolysis over 35CaO/ZP (35% CaO supported on a fly ash-based  zeolite) in the presence of triethanolamine:menthol (TEOA:M, 2:1 mol/mol) DES as  cosolvent. The reactions were carried out in a 250 mL batch magnetic stirred reactor  (900 rpm) with a reflux condenser under atmosferic pressure and at 60 °C. The effect  of the catalyst amount (2-10% based on the oil mass), TEOA:M DES amount (1-9%  based on the oil mass) and methanol:oil molar ratio (6:1-12:1 mol/mol) on the fatty acid  methyl esters (FAMEs) content was analyzed according to a Box-Behnken design. The  obtained experimental data of the FAME content were modeled by a second-order  polynomial equation and the response surface methodology was used for determining  the optimal reaction conditions for achieving the highest FAME content. According to  the analysis of variance (ANOVA), the catalyst amount had the most significant  influence on the FAME content, followed by the TEOA:M DES amount and the  methanol:oil molar ratio. By analyzing the second-order polynomial equation, it can be  concluded that the catalyst amount and TEOA:M DES amount have a positive effect on  the FAME content. The maximum FAME content (99.67%) was achieved under the  following optimal reaction conditions: catalyst amount of 8% (based on the oil mass),  TEOA:M DES amount of 4.8% (based on the oil mass), and methanol:oil molar ratio of  6.1:1.
PB  - Leskovac : Faculty of Technology
C3  - Book of abstracts - 15th international symposium „Novel technologies and sustainable development“,  October, 20-21, 2023, Leskovac, Serbia
T1  - Optimization of the heterogeneously catalysed methanolysis of plum kernel oil in the presence of menthol-based deep eutectic solvent
SP  - 128
EP  - 129
UR  - https://hdl.handle.net/21.15107/rcub_cer_7353
ER  - 

@conference{
author = "Đorđević, Biljana and Pavlović, Stefan and Kostić, Milan and Stamenković, Olivera",
year = "2023",
abstract = "Waste plum kernels from the fruit processing industry might be a valuable oil source  for biodiesel production which use can reduce the biodiesel production cost. The  application of green cosolvents, like deep eutectic solvents (DESs), in the alcoholysis  reaction can improve the oil conversion rate. This study reports on the optimization the plum kernel oil methanolysis over 35CaO/ZP (35% CaO supported on a fly ash-based  zeolite) in the presence of triethanolamine:menthol (TEOA:M, 2:1 mol/mol) DES as  cosolvent. The reactions were carried out in a 250 mL batch magnetic stirred reactor  (900 rpm) with a reflux condenser under atmosferic pressure and at 60 °C. The effect  of the catalyst amount (2-10% based on the oil mass), TEOA:M DES amount (1-9%  based on the oil mass) and methanol:oil molar ratio (6:1-12:1 mol/mol) on the fatty acid  methyl esters (FAMEs) content was analyzed according to a Box-Behnken design. The  obtained experimental data of the FAME content were modeled by a second-order  polynomial equation and the response surface methodology was used for determining  the optimal reaction conditions for achieving the highest FAME content. According to  the analysis of variance (ANOVA), the catalyst amount had the most significant  influence on the FAME content, followed by the TEOA:M DES amount and the  methanol:oil molar ratio. By analyzing the second-order polynomial equation, it can be  concluded that the catalyst amount and TEOA:M DES amount have a positive effect on  the FAME content. The maximum FAME content (99.67%) was achieved under the  following optimal reaction conditions: catalyst amount of 8% (based on the oil mass),  TEOA:M DES amount of 4.8% (based on the oil mass), and methanol:oil molar ratio of  6.1:1.",
publisher = "Leskovac : Faculty of Technology",
journal = "Book of abstracts - 15th international symposium „Novel technologies and sustainable development“,  October, 20-21, 2023, Leskovac, Serbia",
title = "Optimization of the heterogeneously catalysed methanolysis of plum kernel oil in the presence of menthol-based deep eutectic solvent",
pages = "128-129",
url = "https://hdl.handle.net/21.15107/rcub_cer_7353"
}

Đorđević, B., Pavlović, S., Kostić, M.,& Stamenković, O.. (2023). Optimization of the heterogeneously catalysed methanolysis of plum kernel oil in the presence of menthol-based deep eutectic solvent. in Book of abstracts - 15th international symposium „Novel technologies and sustainable development“,  October, 20-21, 2023, Leskovac, Serbia
Leskovac : Faculty of Technology., 128-129.
https://hdl.handle.net/21.15107/rcub_cer_7353

Đorđević B, Pavlović S, Kostić M, Stamenković O. Optimization of the heterogeneously catalysed methanolysis of plum kernel oil in the presence of menthol-based deep eutectic solvent. in Book of abstracts - 15th international symposium „Novel technologies and sustainable development“,  October, 20-21, 2023, Leskovac, Serbia. 2023;:128-129.
https://hdl.handle.net/21.15107/rcub_cer_7353 .

Đorđević, Biljana, Pavlović, Stefan, Kostić, Milan, Stamenković, Olivera, "Optimization of the heterogeneously catalysed methanolysis of plum kernel oil in the presence of menthol-based deep eutectic solvent" in Book of abstracts - 15th international symposium „Novel technologies and sustainable development“,  October, 20-21, 2023, Leskovac, Serbia (2023):128-129,
https://hdl.handle.net/21.15107/rcub_cer_7353 .

TY  - CONF
AU  - Đukić-Vuković, Aleksandra
AU  - Grbić, Jovana
AU  - Mladenović, Dragana
AU  - Pavlović, Stefan
AU  - Lazović, Saša
AU  - Mojović, Ljiljana
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7400
AB  - We combined cold plasma treatment (CPT) with water, ethanol, Fenton and hydrogen peroxide media under acidic and basic conditions for treatment of corn stalks as significant lignocellulose agri-industrial waste. Chemical properties of treated samples were analyzed by FTIR and mercury porosimetry, acetyl bromide soluble lignin content was determined by spectrophotometric methods, while carbohydrate 
fractions were subjected to enzymatic hydrolysis followed by spectrophotometric analysis to assess its potential for fermentations. Lignin fraction which is often neglected (Ponnusamy et al., 2019) was also examined as a source of antioxidants.
PB  - National Technical University of Athens
C3  - 10th International Conference on Sustainable Solid Waste Management, Chania2023, 21-24 June, Chania, Greece
T1  - Corn stalks as a lignocellulose substrate for biorefinery applications
UR  - https://hdl.handle.net/21.15107/rcub_cer_7400
ER  - 

@conference{
author = "Đukić-Vuković, Aleksandra and Grbić, Jovana and Mladenović, Dragana and Pavlović, Stefan and Lazović, Saša and Mojović, Ljiljana",
year = "2023",
abstract = "We combined cold plasma treatment (CPT) with water, ethanol, Fenton and hydrogen peroxide media under acidic and basic conditions for treatment of corn stalks as significant lignocellulose agri-industrial waste. Chemical properties of treated samples were analyzed by FTIR and mercury porosimetry, acetyl bromide soluble lignin content was determined by spectrophotometric methods, while carbohydrate 
fractions were subjected to enzymatic hydrolysis followed by spectrophotometric analysis to assess its potential for fermentations. Lignin fraction which is often neglected (Ponnusamy et al., 2019) was also examined as a source of antioxidants.",
publisher = "National Technical University of Athens",
journal = "10th International Conference on Sustainable Solid Waste Management, Chania2023, 21-24 June, Chania, Greece",
title = "Corn stalks as a lignocellulose substrate for biorefinery applications",
url = "https://hdl.handle.net/21.15107/rcub_cer_7400"
}

Đukić-Vuković, A., Grbić, J., Mladenović, D., Pavlović, S., Lazović, S.,& Mojović, L.. (2023). Corn stalks as a lignocellulose substrate for biorefinery applications. in 10th International Conference on Sustainable Solid Waste Management, Chania2023, 21-24 June, Chania, Greece
National Technical University of Athens..
https://hdl.handle.net/21.15107/rcub_cer_7400

Đukić-Vuković A, Grbić J, Mladenović D, Pavlović S, Lazović S, Mojović L. Corn stalks as a lignocellulose substrate for biorefinery applications. in 10th International Conference on Sustainable Solid Waste Management, Chania2023, 21-24 June, Chania, Greece. 2023;.
https://hdl.handle.net/21.15107/rcub_cer_7400 .

Đukić-Vuković, Aleksandra, Grbić, Jovana, Mladenović, Dragana, Pavlović, Stefan, Lazović, Saša, Mojović, Ljiljana, "Corn stalks as a lignocellulose substrate for biorefinery applications" in 10th International Conference on Sustainable Solid Waste Management, Chania2023, 21-24 June, Chania, Greece (2023),
https://hdl.handle.net/21.15107/rcub_cer_7400 .

TY  - JOUR
AU  - Grbić, Jovana
AU  - Mladenović, Dragana
AU  - Pavlović, Stefan
AU  - Lazović, Saša
AU  - Mojović, Ljiljana
AU  - Đukić-Vuković, Aleksandra
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5650
AB  - The depletion of fossil fuel reserves and severe environmental damage, resulting in climate change and global warming lead to a necessary shift to alternative renewable resources. Lignocellulose is a valuable feedstock for biorefineries, but its conversion is hindered by the limitations of conventional pretreatments lacking selectivity. This step should also be cost-effective and sustainable. In this paper, combined advanced oxidation techniques were applied for the treatment of corn stalks as a pretreatment for enzymatic hydrolysis. Their effect on delignification and cellulose digestibility was monitored. The combined non-thermal plasma/Fenton treatment appears to be suitable for breaking the complex lignocellulose structure, with a lignin content decrease of 39%. This treatment enhanced carbohydrate hydrolysis, resulting in 2.25 times increase in hexose yield, compared to the untreated sample. Long-term plasma treatment positively affected the textural properties, total porosity, and pore size diameter, of lignocellulose biomass. It enables the creation of materials with a stable system of pores and channels, for the unhindered diffusion of large organic molecules such as enzymes. Additionally, a combination of plasma treatment with Fenton reaction increased selectivity towards lignin degradation in comparison to independently applied Fenton treatment. This could be a significant advantage for a bottleneck in the current valorization of biomass.
PB  - Elsevier B.V.
T2  - Sustainable Chemistry and Pharmacy
T1  - Advanced oxidation processes in the treatment of corn stalks
VL  - 32
SP  - 100962
DO  - 10.1016/j.scp.2022.100962
ER  - 

@article{
author = "Grbić, Jovana and Mladenović, Dragana and Pavlović, Stefan and Lazović, Saša and Mojović, Ljiljana and Đukić-Vuković, Aleksandra",
year = "2023",
abstract = "The depletion of fossil fuel reserves and severe environmental damage, resulting in climate change and global warming lead to a necessary shift to alternative renewable resources. Lignocellulose is a valuable feedstock for biorefineries, but its conversion is hindered by the limitations of conventional pretreatments lacking selectivity. This step should also be cost-effective and sustainable. In this paper, combined advanced oxidation techniques were applied for the treatment of corn stalks as a pretreatment for enzymatic hydrolysis. Their effect on delignification and cellulose digestibility was monitored. The combined non-thermal plasma/Fenton treatment appears to be suitable for breaking the complex lignocellulose structure, with a lignin content decrease of 39%. This treatment enhanced carbohydrate hydrolysis, resulting in 2.25 times increase in hexose yield, compared to the untreated sample. Long-term plasma treatment positively affected the textural properties, total porosity, and pore size diameter, of lignocellulose biomass. It enables the creation of materials with a stable system of pores and channels, for the unhindered diffusion of large organic molecules such as enzymes. Additionally, a combination of plasma treatment with Fenton reaction increased selectivity towards lignin degradation in comparison to independently applied Fenton treatment. This could be a significant advantage for a bottleneck in the current valorization of biomass.",
publisher = "Elsevier B.V.",
journal = "Sustainable Chemistry and Pharmacy",
title = "Advanced oxidation processes in the treatment of corn stalks",
volume = "32",
pages = "100962",
doi = "10.1016/j.scp.2022.100962"
}

Grbić, J., Mladenović, D., Pavlović, S., Lazović, S., Mojović, L.,& Đukić-Vuković, A.. (2023). Advanced oxidation processes in the treatment of corn stalks. in Sustainable Chemistry and Pharmacy
Elsevier B.V.., 32, 100962.
https://doi.org/10.1016/j.scp.2022.100962

Grbić J, Mladenović D, Pavlović S, Lazović S, Mojović L, Đukić-Vuković A. Advanced oxidation processes in the treatment of corn stalks. in Sustainable Chemistry and Pharmacy. 2023;32:100962.
doi:10.1016/j.scp.2022.100962 .

Grbić, Jovana, Mladenović, Dragana, Pavlović, Stefan, Lazović, Saša, Mojović, Ljiljana, Đukić-Vuković, Aleksandra, "Advanced oxidation processes in the treatment of corn stalks" in Sustainable Chemistry and Pharmacy, 32 (2023):100962,
https://doi.org/10.1016/j.scp.2022.100962 . .

TY  - JOUR
AU  - Miladinović, Marija
AU  - Pavlović, Stefan
AU  - Banković-Ilić, Ivana
AU  - Kostić, Milan
AU  - Stamenković, Olivera
AU  - Veljković, Vlada
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7206
AB  - Possibilities of using waste plum stones in biodiesel production were investigated. The plum kernels were used as a source to obtain oil by the Soxhlet extraction method, while the whole plum stones, the plum stone shells that remained after the crashing, and the plum kernel cake that remained after the oil extraction, were burned off to obtain ashes. The collected ashes were characterized by elemental composition, porosity, and base strength and tested for catalytic activity in transesterification of esterified plum kernel oil. Dominant elements were potassium, calcium, and magnesium at different contents in the three obtained ashes. The most active catalyst was the plum stone shell ash, so the effect of temperature (40, 50, and 60°C) on the reaction rate was investigated. The reaction rate constant increased with the reaction temperature with the activation energy value of 58.8 kJ mol-1. In addition, the plum stone shell ash can be reused as a catalyst after recalcination.
AB  - U ovom radu istraživana je mogućnost korišćenja otpadnih koštica šljive u proizvodnji biodizela. Jezgra  šljive su iskorišćena kao sirovina za dobijanje ulja primenom Soxhlet-ove metode ekstrakcije. Cele  koštice, ljuske koštica šljive i pogača dobijena nakon ekstrakcije ulja iz jezgra šljive spaljeni su da bi se  dobio pepeo, koji je korišćen kao katalizator. Dobijene tri vrste sakupljenog pepela su najpre  okarakterisane u pogledu hemijskog sastava, poroznosti i baznosti, a zatim je testirana katalitička  aktivnost u transesterifikaciji esterifikovanog ulja koštica šljive. Dominantni elementi u pepelu, kao što  su kalijum, kalcijum i magnezijum, imali su različit sadržaj u sve tri vrste pepela. Najveću katalitičku  aktivnost pokazao je pepeo koštica šljive, zbog čega je dalje istraživan uticaj temperature (40, 50 i 60 °C)  na brzinu reakcije katalizovane ovim pepelom. Konstanta brzine reakcije povećavala se sa porastom  temperature reakcije, a vrednost energije aktivacije je 58,8 kJ mol-1 . Pored toga, pepeo koštica šljive  može se ponovo koristiti kao katalizator nakon rekalcinacije.
PB  - Association of Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Utilization of waste plum stones as a source of oil and catalyst for biodiesel production
T1  - Korišćenje otpadnih koštica šljive kao izvora ulja i katalizatora za  proizvodnju biodizela
VL  - 77
IS  - 1
SP  - 39
EP  - 52
DO  - 10.2298/HEMIND221113009M
ER  - 

@article{
author = "Miladinović, Marija and Pavlović, Stefan and Banković-Ilić, Ivana and Kostić, Milan and Stamenković, Olivera and Veljković, Vlada",
year = "2023",
abstract = "Possibilities of using waste plum stones in biodiesel production were investigated. The plum kernels were used as a source to obtain oil by the Soxhlet extraction method, while the whole plum stones, the plum stone shells that remained after the crashing, and the plum kernel cake that remained after the oil extraction, were burned off to obtain ashes. The collected ashes were characterized by elemental composition, porosity, and base strength and tested for catalytic activity in transesterification of esterified plum kernel oil. Dominant elements were potassium, calcium, and magnesium at different contents in the three obtained ashes. The most active catalyst was the plum stone shell ash, so the effect of temperature (40, 50, and 60°C) on the reaction rate was investigated. The reaction rate constant increased with the reaction temperature with the activation energy value of 58.8 kJ mol-1. In addition, the plum stone shell ash can be reused as a catalyst after recalcination., U ovom radu istraživana je mogućnost korišćenja otpadnih koštica šljive u proizvodnji biodizela. Jezgra  šljive su iskorišćena kao sirovina za dobijanje ulja primenom Soxhlet-ove metode ekstrakcije. Cele  koštice, ljuske koštica šljive i pogača dobijena nakon ekstrakcije ulja iz jezgra šljive spaljeni su da bi se  dobio pepeo, koji je korišćen kao katalizator. Dobijene tri vrste sakupljenog pepela su najpre  okarakterisane u pogledu hemijskog sastava, poroznosti i baznosti, a zatim je testirana katalitička  aktivnost u transesterifikaciji esterifikovanog ulja koštica šljive. Dominantni elementi u pepelu, kao što  su kalijum, kalcijum i magnezijum, imali su različit sadržaj u sve tri vrste pepela. Najveću katalitičku  aktivnost pokazao je pepeo koštica šljive, zbog čega je dalje istraživan uticaj temperature (40, 50 i 60 °C)  na brzinu reakcije katalizovane ovim pepelom. Konstanta brzine reakcije povećavala se sa porastom  temperature reakcije, a vrednost energije aktivacije je 58,8 kJ mol-1 . Pored toga, pepeo koštica šljive  može se ponovo koristiti kao katalizator nakon rekalcinacije.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Utilization of waste plum stones as a source of oil and catalyst for biodiesel production, Korišćenje otpadnih koštica šljive kao izvora ulja i katalizatora za  proizvodnju biodizela",
volume = "77",
number = "1",
pages = "39-52",
doi = "10.2298/HEMIND221113009M"
}

Miladinović, M., Pavlović, S., Banković-Ilić, I., Kostić, M., Stamenković, O.,& Veljković, V.. (2023). Utilization of waste plum stones as a source of oil and catalyst for biodiesel production. in Hemijska industrija
Association of Chemical Engineers of Serbia., 77(1), 39-52.
https://doi.org/10.2298/HEMIND221113009M

Miladinović M, Pavlović S, Banković-Ilić I, Kostić M, Stamenković O, Veljković V. Utilization of waste plum stones as a source of oil and catalyst for biodiesel production. in Hemijska industrija. 2023;77(1):39-52.
doi:10.2298/HEMIND221113009M .

Miladinović, Marija, Pavlović, Stefan, Banković-Ilić, Ivana, Kostić, Milan, Stamenković, Olivera, Veljković, Vlada, "Utilization of waste plum stones as a source of oil and catalyst for biodiesel production" in Hemijska industrija, 77, no. 1 (2023):39-52,
https://doi.org/10.2298/HEMIND221113009M . .

TY  - JOUR
AU  - Velić, Natalija
AU  - Stjepanović, Marija
AU  - Pavlović, Stefan
AU  - Bagherifam, Saeed
AU  - Banković, Predrag
AU  - Jović-Jovičić, Nataša
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6901
AB  - Since the synthetic dye Congo red and nitrate are notorious contributors to water pollution
due to their persistent and potentially toxic nature, it is necessary to develop new efficient methods to
remove them from water bodies. Native lignocellulosic materials as biosorbents are mostly inferior,
i.e., the adsorption capacities of native materials are lower. Therefore, attempts have been made to
improve the adsorption capacities of such materials by physical and/or chemical methods, including
the production of biochar. In this study, adsorptive removal was investigated using a novel biosorbent
(mPWS) obtained by modifying poplar (waste) sawdust through quaternisation. The characterisation
of mPWS included SEM/EDX, FTIR, and MIP analysis. The adsorption of CR and nitrate onto mPWS
was studied in a batch system, as a function of contact time (1–240 min), biosorbent concentration
(1–8 g/dm3), and initial adsorbate concentration (25–200 mg/dm3). In all experiments, a high
removal of both adsorbates, from 60 to over 90%, was achieved. Langmuir and Freundlich adsorption
isotherm models were used in order to describe equilibrium adsorption data, while pseudo-first-order
and pseudo-second-order kinetic models, and the intraparticle diffusion model, were used to describe
possible adsorption mechanisms. The Langmuir model fit the adsorption data of CR well, while the
nitrate adsorption process was better interpreted with the Freundlich isotherm model. The kinetics
data for both CR and nitrate agreed with the pseudo-second-order kinetics model, while analysis
using the intraparticle diffusion model indicated two rate-limiting steps during the adsorption
process. Based on the results, it can be concluded that the tested novel biosorbent can be effectively
used for the removal of CR and nitrate from water (with its adsorption capacities being 70.3 mg/g
and 43.6 mg/g, respectively).
PB  - MDPI
T2  - Water
T1  - Modified Lignocellulosic Waste for the Amelioration of Water Quality: Adsorptive Removal of Congo Red and Nitrate Using Modified Poplar Sawdust
VL  - 15
IS  - 21
SP  - 3776
DO  - 10.3390/w15213776
ER  - 

@article{
author = "Velić, Natalija and Stjepanović, Marija and Pavlović, Stefan and Bagherifam, Saeed and Banković, Predrag and Jović-Jovičić, Nataša",
year = "2023",
abstract = "Since the synthetic dye Congo red and nitrate are notorious contributors to water pollution
due to their persistent and potentially toxic nature, it is necessary to develop new efficient methods to
remove them from water bodies. Native lignocellulosic materials as biosorbents are mostly inferior,
i.e., the adsorption capacities of native materials are lower. Therefore, attempts have been made to
improve the adsorption capacities of such materials by physical and/or chemical methods, including
the production of biochar. In this study, adsorptive removal was investigated using a novel biosorbent
(mPWS) obtained by modifying poplar (waste) sawdust through quaternisation. The characterisation
of mPWS included SEM/EDX, FTIR, and MIP analysis. The adsorption of CR and nitrate onto mPWS
was studied in a batch system, as a function of contact time (1–240 min), biosorbent concentration
(1–8 g/dm3), and initial adsorbate concentration (25–200 mg/dm3). In all experiments, a high
removal of both adsorbates, from 60 to over 90%, was achieved. Langmuir and Freundlich adsorption
isotherm models were used in order to describe equilibrium adsorption data, while pseudo-first-order
and pseudo-second-order kinetic models, and the intraparticle diffusion model, were used to describe
possible adsorption mechanisms. The Langmuir model fit the adsorption data of CR well, while the
nitrate adsorption process was better interpreted with the Freundlich isotherm model. The kinetics
data for both CR and nitrate agreed with the pseudo-second-order kinetics model, while analysis
using the intraparticle diffusion model indicated two rate-limiting steps during the adsorption
process. Based on the results, it can be concluded that the tested novel biosorbent can be effectively
used for the removal of CR and nitrate from water (with its adsorption capacities being 70.3 mg/g
and 43.6 mg/g, respectively).",
publisher = "MDPI",
journal = "Water",
title = "Modified Lignocellulosic Waste for the Amelioration of Water Quality: Adsorptive Removal of Congo Red and Nitrate Using Modified Poplar Sawdust",
volume = "15",
number = "21",
pages = "3776",
doi = "10.3390/w15213776"
}

Velić, N., Stjepanović, M., Pavlović, S., Bagherifam, S., Banković, P.,& Jović-Jovičić, N.. (2023). Modified Lignocellulosic Waste for the Amelioration of Water Quality: Adsorptive Removal of Congo Red and Nitrate Using Modified Poplar Sawdust. in Water
MDPI., 15(21), 3776.
https://doi.org/10.3390/w15213776

Velić N, Stjepanović M, Pavlović S, Bagherifam S, Banković P, Jović-Jovičić N. Modified Lignocellulosic Waste for the Amelioration of Water Quality: Adsorptive Removal of Congo Red and Nitrate Using Modified Poplar Sawdust. in Water. 2023;15(21):3776.
doi:10.3390/w15213776 .

Velić, Natalija, Stjepanović, Marija, Pavlović, Stefan, Bagherifam, Saeed, Banković, Predrag, Jović-Jovičić, Nataša, "Modified Lignocellulosic Waste for the Amelioration of Water Quality: Adsorptive Removal of Congo Red and Nitrate Using Modified Poplar Sawdust" in Water, 15, no. 21 (2023):3776,
https://doi.org/10.3390/w15213776 . .

TY  - JOUR
AU  - Marinković, Dalibor
AU  - Pavlović, Stefan
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6239
AB  - Considering the current world crisis and definite future energy challenges, biomass-to-fuel 
transformation is increasingly becoming important both to the policy makers and to the 
industry. In this perspective, the valorisation of oils and fats via transesterification/esteri fication reaction is an attractive method for producing biodiesel with qualities suitable for 
diesel engines. The recent interest indicated a significant shift to industrial waste valorisation 
as another approach for achieving process eco-efficiency. In this respect, the use of zeolite based catalysts for the production of biofuels is reviewed here, with a special emphasis on the 
utilization of waste raw materials following the principles of green chemistry and sustainable 
development. Zeolites are interesting due to their outstanding catalytic properties, including 
the presence of intrinsic acid sites, simple loading of base sites, shape-selectivity, and high 
thermal stability. Neat zeolites or modified by the loading of active species are classified into 
several groups following their origin. For each group, the most relevant recent results reported 
in the literature are reviewed together with some critical considerations on the catalyst 
effectiveness, stability, reusability, and economy of synthesis. As an important part required 
for understanding and optimization of the biodiesel production process, the mechanisms of 
the reaction were discussed in detail. Finally, key perspective directions for further research 
studies were carefully identified and elaborated.
AB  - Imajući u vidu trenutnu svetsku krizu kao i buduće energetske izazove, transformacija biomase u goriva ponovo dobija veliku pažnju zakonodavaca i industrije. Znajući ovo, valorizacija ulja i masnoća putem reakcija transesterifikacije/esterifikacije postaje atraktivan metod za proizvodnju kvalitetnog biodizela pogodnog za postojeće dizel motore. Veliko interesovanje naučnika ukazuje na značajan pomak ka valorizaciji industrijskog otpada kao još jednom pristupu za razvoj ekološki efikasnih procesa. U tom smislu, ovaj rad predstavlja pregled upotrebe zeolitnih katalizatora za dobijanje biogoriva, sa posebnim akcentom na upotrebu otpadnih sirovina u skladu sa principima zelene hemije i održivog razvoja. Zeolitni materijali su veoma pogodni zbog svojih izvanrednih katalitičkih svojstava, uključujući intrinsičke kisele centre, jednostavno nanošenje baznih centara, strukturnu selektivnost i veliku termičku stabilnost. Čisti zeoliti, ili modifikovani nanošenjem aktivnih centara, klasifikovani su u nekoliko grupa u ovom radu u skladu sa njihovim poreklom. Za svaku od različitih grupa zeolita, najrelevantniji skorašnji literaturni rezultati predstavljeni su zajedno sa kritičkim razmatranjem efikasnosti katalizatora, stabilnosti, mogućnosti ponovne upotrebe i ekonomičnosti njihove sinteze. Kao važan deo neophodan za razumevanje i optimizaciju procesa, detaljno su razmotreni mehanizmi reakcije. Na kraju, pažljivo su identifikovani i obrazloženi ključni perspektivni pravci za dalja istraživanja.
PB  - Association of Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Recent advances in waste-based and natural zeolitic catalytic materials for biodiesel production
T1  - Najnovija saznanja o upotrebi prirodnih zeolita i zeolitnih katalizatora  baziranih na otpadu za proizvodnju biodizela
VL  - 77
IS  - 1
SP  - 5
EP  - 38
DO  - 10.2298/HEMIND220804007M
ER  - 

@article{
author = "Marinković, Dalibor and Pavlović, Stefan",
year = "2023",
abstract = "Considering the current world crisis and definite future energy challenges, biomass-to-fuel 
transformation is increasingly becoming important both to the policy makers and to the 
industry. In this perspective, the valorisation of oils and fats via transesterification/esteri fication reaction is an attractive method for producing biodiesel with qualities suitable for 
diesel engines. The recent interest indicated a significant shift to industrial waste valorisation 
as another approach for achieving process eco-efficiency. In this respect, the use of zeolite based catalysts for the production of biofuels is reviewed here, with a special emphasis on the 
utilization of waste raw materials following the principles of green chemistry and sustainable 
development. Zeolites are interesting due to their outstanding catalytic properties, including 
the presence of intrinsic acid sites, simple loading of base sites, shape-selectivity, and high 
thermal stability. Neat zeolites or modified by the loading of active species are classified into 
several groups following their origin. For each group, the most relevant recent results reported 
in the literature are reviewed together with some critical considerations on the catalyst 
effectiveness, stability, reusability, and economy of synthesis. As an important part required 
for understanding and optimization of the biodiesel production process, the mechanisms of 
the reaction were discussed in detail. Finally, key perspective directions for further research 
studies were carefully identified and elaborated., Imajući u vidu trenutnu svetsku krizu kao i buduće energetske izazove, transformacija biomase u goriva ponovo dobija veliku pažnju zakonodavaca i industrije. Znajući ovo, valorizacija ulja i masnoća putem reakcija transesterifikacije/esterifikacije postaje atraktivan metod za proizvodnju kvalitetnog biodizela pogodnog za postojeće dizel motore. Veliko interesovanje naučnika ukazuje na značajan pomak ka valorizaciji industrijskog otpada kao još jednom pristupu za razvoj ekološki efikasnih procesa. U tom smislu, ovaj rad predstavlja pregled upotrebe zeolitnih katalizatora za dobijanje biogoriva, sa posebnim akcentom na upotrebu otpadnih sirovina u skladu sa principima zelene hemije i održivog razvoja. Zeolitni materijali su veoma pogodni zbog svojih izvanrednih katalitičkih svojstava, uključujući intrinsičke kisele centre, jednostavno nanošenje baznih centara, strukturnu selektivnost i veliku termičku stabilnost. Čisti zeoliti, ili modifikovani nanošenjem aktivnih centara, klasifikovani su u nekoliko grupa u ovom radu u skladu sa njihovim poreklom. Za svaku od različitih grupa zeolita, najrelevantniji skorašnji literaturni rezultati predstavljeni su zajedno sa kritičkim razmatranjem efikasnosti katalizatora, stabilnosti, mogućnosti ponovne upotrebe i ekonomičnosti njihove sinteze. Kao važan deo neophodan za razumevanje i optimizaciju procesa, detaljno su razmotreni mehanizmi reakcije. Na kraju, pažljivo su identifikovani i obrazloženi ključni perspektivni pravci za dalja istraživanja.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Recent advances in waste-based and natural zeolitic catalytic materials for biodiesel production, Najnovija saznanja o upotrebi prirodnih zeolita i zeolitnih katalizatora  baziranih na otpadu za proizvodnju biodizela",
volume = "77",
number = "1",
pages = "5-38",
doi = "10.2298/HEMIND220804007M"
}

Marinković, D.,& Pavlović, S.. (2023). Recent advances in waste-based and natural zeolitic catalytic materials for biodiesel production. in Hemijska industrija
Association of Chemical Engineers of Serbia., 77(1), 5-38.
https://doi.org/10.2298/HEMIND220804007M

Marinković D, Pavlović S. Recent advances in waste-based and natural zeolitic catalytic materials for biodiesel production. in Hemijska industrija. 2023;77(1):5-38.
doi:10.2298/HEMIND220804007M .

Marinković, Dalibor, Pavlović, Stefan, "Recent advances in waste-based and natural zeolitic catalytic materials for biodiesel production" in Hemijska industrija, 77, no. 1 (2023):5-38,
https://doi.org/10.2298/HEMIND220804007M . .

TY  - JOUR
AU  - Novaković, Tatjana
AU  - Pavlović, Stefan
AU  - Pagnacco, Maja
AU  - Banković, Predrag
AU  - Mojović, Zorica
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5303
AB  - A novel and simple electrochemical sensor for the determination of gallic acid is presented. The alumina sample was characterized by X-ray diffraction, FTIR, and particle size distribution analysis. The carbon paste electrode was modified with alumina and used as a sensor. The performances of the sensor were assessed by cyclic voltammetry and square-wave voltammetry techniques. The oxidation of gallic acid on alumina-modified carbon paste electrode was an irreversible diffusion-controlled process. The linear relationship of peak current and concentration was obtained for the concentration range of 1.4 to 115 µM with the limit of detection of 0.8 µM. The sensor’s ability to test gallic aid in real systems was successfully tested in wine samples.
PB  - Springer
T2  - Electrocatalysis
T1  - The Application of Alumina for Electroanalytical Determination of Gallic Acid
VL  - 14
SP  - 18
EP  - 28
DO  - 10.1007/s12678-022-00770-2
ER  - 

@article{
author = "Novaković, Tatjana and Pavlović, Stefan and Pagnacco, Maja and Banković, Predrag and Mojović, Zorica",
year = "2023",
abstract = "A novel and simple electrochemical sensor for the determination of gallic acid is presented. The alumina sample was characterized by X-ray diffraction, FTIR, and particle size distribution analysis. The carbon paste electrode was modified with alumina and used as a sensor. The performances of the sensor were assessed by cyclic voltammetry and square-wave voltammetry techniques. The oxidation of gallic acid on alumina-modified carbon paste electrode was an irreversible diffusion-controlled process. The linear relationship of peak current and concentration was obtained for the concentration range of 1.4 to 115 µM with the limit of detection of 0.8 µM. The sensor’s ability to test gallic aid in real systems was successfully tested in wine samples.",
publisher = "Springer",
journal = "Electrocatalysis",
title = "The Application of Alumina for Electroanalytical Determination of Gallic Acid",
volume = "14",
pages = "18-28",
doi = "10.1007/s12678-022-00770-2"
}

Novaković, T., Pavlović, S., Pagnacco, M., Banković, P.,& Mojović, Z.. (2023). The Application of Alumina for Electroanalytical Determination of Gallic Acid. in Electrocatalysis
Springer., 14, 18-28.
https://doi.org/10.1007/s12678-022-00770-2

Novaković T, Pavlović S, Pagnacco M, Banković P, Mojović Z. The Application of Alumina for Electroanalytical Determination of Gallic Acid. in Electrocatalysis. 2023;14:18-28.
doi:10.1007/s12678-022-00770-2 .

Novaković, Tatjana, Pavlović, Stefan, Pagnacco, Maja, Banković, Predrag, Mojović, Zorica, "The Application of Alumina for Electroanalytical Determination of Gallic Acid" in Electrocatalysis, 14 (2023):18-28,
https://doi.org/10.1007/s12678-022-00770-2 . .

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  - 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  - 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  - CONF
AU  - Pavlović, Stefan
AU  - Kosić, Višnja
AU  - Lončarević, Davor
AU  - Kostić, Milan
AU  - Marinković, Dalibor
PY  - 2022
UR  - https://www.fuelcenter.rwth-aachen.de/cms/Fuelcenter/Austausch/Internationale-Konferenz/~rwsva/10-Internationale-Konferenz-2022/?lidx=1
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5304
AB  - Waste-based CaO was synthesized from chicken eggshell, which calcined form (900 ºC, 5 ºC/min, 4 h) was hydrated (80 ºC, S:L=1:5, 24 h) and rehydrated/calcined (600 ºC, 5 ºC/min, 4 h). The obtained catalyst was characterized (Hg-porosimetry and TPD-CO2) and tested in biodiesel synthesis from off-grade sunflower oil by transesterification to analyse the influence of water addition on reaction intensification. Water content was varied in the range from 1 wt% to 9 wt% by weight of oil. It is shown that water addition positively affects the catalytic activity leading to a reduction in induction time and to faster achievement of the reaction equilibrium (fatty acid methyl esters content > 95%), which for a water content higher than 1 wt% is achieved in 90 min. On the other hand, the equilibrium for the reaction without water addition was achieved considerably later (after 150 min).
PB  - Aachen, Germany : Fuel Science Center, RWTH Aachen University
C3  - Conference report/Book of abstracts-10th International Conference "Fuel Science - From Production to Propulsion"
T1  - Acceleration of biodiesel production from off-grade oil over waste-based CaO catalyst
SP  - 83
EP  - 84
UR  - https://hdl.handle.net/21.15107/rcub_cer_5304
ER  - 

@conference{
author = "Pavlović, Stefan and Kosić, Višnja and Lončarević, Davor and Kostić, Milan and Marinković, Dalibor",
year = "2022",
abstract = "Waste-based CaO was synthesized from chicken eggshell, which calcined form (900 ºC, 5 ºC/min, 4 h) was hydrated (80 ºC, S:L=1:5, 24 h) and rehydrated/calcined (600 ºC, 5 ºC/min, 4 h). The obtained catalyst was characterized (Hg-porosimetry and TPD-CO2) and tested in biodiesel synthesis from off-grade sunflower oil by transesterification to analyse the influence of water addition on reaction intensification. Water content was varied in the range from 1 wt% to 9 wt% by weight of oil. It is shown that water addition positively affects the catalytic activity leading to a reduction in induction time and to faster achievement of the reaction equilibrium (fatty acid methyl esters content > 95%), which for a water content higher than 1 wt% is achieved in 90 min. On the other hand, the equilibrium for the reaction without water addition was achieved considerably later (after 150 min).",
publisher = "Aachen, Germany : Fuel Science Center, RWTH Aachen University",
journal = "Conference report/Book of abstracts-10th International Conference "Fuel Science - From Production to Propulsion"",
title = "Acceleration of biodiesel production from off-grade oil over waste-based CaO catalyst",
pages = "83-84",
url = "https://hdl.handle.net/21.15107/rcub_cer_5304"
}

Pavlović, S., Kosić, V., Lončarević, D., Kostić, M.,& Marinković, D.. (2022). Acceleration of biodiesel production from off-grade oil over waste-based CaO catalyst. in Conference report/Book of abstracts-10th International Conference "Fuel Science - From Production to Propulsion"
Aachen, Germany : Fuel Science Center, RWTH Aachen University., 83-84.
https://hdl.handle.net/21.15107/rcub_cer_5304

Pavlović S, Kosić V, Lončarević D, Kostić M, Marinković D. Acceleration of biodiesel production from off-grade oil over waste-based CaO catalyst. in Conference report/Book of abstracts-10th International Conference "Fuel Science - From Production to Propulsion". 2022;:83-84.
https://hdl.handle.net/21.15107/rcub_cer_5304 .

Pavlović, Stefan, Kosić, Višnja, Lončarević, Davor, Kostić, Milan, Marinković, Dalibor, "Acceleration of biodiesel production from off-grade oil over waste-based CaO catalyst" in Conference report/Book of abstracts-10th International Conference "Fuel Science - From Production to Propulsion" (2022):83-84,
https://hdl.handle.net/21.15107/rcub_cer_5304 .

TY  - CONF
AU  - Pavlović, Stefan
AU  - Kosić, Višnja
AU  - Marinković, Dalibor
AU  - Kostić, Milan
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5307
AB  - The waste fractionated chicken eggshell catalysts were utilized and used in biodiesel production from off-grade sunflower oil. It is confirmed that thermal modification treatment was suitable for conversion of calcite form of eggshell into lime. Fractionation was carried out in the wide particle diameter range from 20 μm. to 100 μm. It is shown that the highest catalytic activity (fatty acid methyl esters content-FAME >96%) was achieved using catalyst obtained from powder faction of >45<63 μm. Important differences in catalytic activity were observed for the boundary fractions (<20 μm, >20<36 μm, and >100 μm), where catalytic activity was greatly reduced. Such behaviour could be explained by mercury intrusion porosimetry results, which indicate the existence of apparent porosity (interparticle and intraparticle) in the mentioned boundary fractions, while in the central fraction (>45<63 μm) the porosity is constant. A poorly-developed system of pores and channels leads to difficult diffusion and inadequate distribution of active centres.
C3  - Proceedings - 2nd International Conference On Green Energy And Environmental Technology
T1  - Biodiesel Production From Off-Grade Oil By Transesterification Over Differently Granulated Waste-Based CaO Catalysts
UR  - https://hdl.handle.net/21.15107/rcub_cer_5307
ER  - 

@conference{
author = "Pavlović, Stefan and Kosić, Višnja and Marinković, Dalibor and Kostić, Milan",
year = "2022",
abstract = "The waste fractionated chicken eggshell catalysts were utilized and used in biodiesel production from off-grade sunflower oil. It is confirmed that thermal modification treatment was suitable for conversion of calcite form of eggshell into lime. Fractionation was carried out in the wide particle diameter range from 20 μm. to 100 μm. It is shown that the highest catalytic activity (fatty acid methyl esters content-FAME >96%) was achieved using catalyst obtained from powder faction of >45<63 μm. Important differences in catalytic activity were observed for the boundary fractions (<20 μm, >20<36 μm, and >100 μm), where catalytic activity was greatly reduced. Such behaviour could be explained by mercury intrusion porosimetry results, which indicate the existence of apparent porosity (interparticle and intraparticle) in the mentioned boundary fractions, while in the central fraction (>45<63 μm) the porosity is constant. A poorly-developed system of pores and channels leads to difficult diffusion and inadequate distribution of active centres.",
journal = "Proceedings - 2nd International Conference On Green Energy And Environmental Technology",
title = "Biodiesel Production From Off-Grade Oil By Transesterification Over Differently Granulated Waste-Based CaO Catalysts",
url = "https://hdl.handle.net/21.15107/rcub_cer_5307"
}

Pavlović, S., Kosić, V., Marinković, D.,& Kostić, M.. (2022). Biodiesel Production From Off-Grade Oil By Transesterification Over Differently Granulated Waste-Based CaO Catalysts. in Proceedings - 2nd International Conference On Green Energy And Environmental Technology.
https://hdl.handle.net/21.15107/rcub_cer_5307

Pavlović S, Kosić V, Marinković D, Kostić M. Biodiesel Production From Off-Grade Oil By Transesterification Over Differently Granulated Waste-Based CaO Catalysts. in Proceedings - 2nd International Conference On Green Energy And Environmental Technology. 2022;.
https://hdl.handle.net/21.15107/rcub_cer_5307 .

Pavlović, Stefan, Kosić, Višnja, Marinković, Dalibor, Kostić, Milan, "Biodiesel Production From Off-Grade Oil By Transesterification Over Differently Granulated Waste-Based CaO Catalysts" in Proceedings - 2nd International Conference On Green Energy And Environmental Technology (2022),
https://hdl.handle.net/21.15107/rcub_cer_5307 .

TY  - CONF
AU  - Mudrinić, Tihana
AU  - Petrović, Srđan
AU  - Krstić, Jugoslav
AU  - Milovanović, Biljana
AU  - Pavlović, Stefan
AU  - Milutinović Nikolić, Aleksandra
AU  - Banković, Predrag
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4780
AB  - This work describes the possible application of cyclic voltammetry (CV) for obtaining information  about  cobalt  phases  onto  alumina supported  cobalt  catalysts.Starting  from  the  same  amount  of  ingredients,  two  catalysts  with  different  phases  of  cobalt  were  prepared:  Co3O4-A  obtained  by  manual  grinding  of  Co3O4  and alumina  in  an  agate  mortar  and  CoAl2O4-A  obtained  mechanochemically  using  a  planetary  ball  mill.The  final  productswere characterized  by  the  temperature-programmed  reduction  (TPR)  and  CV.  The  TPR  profile  of  Co3O4-A  showed  peaks  between  200–500°C  characteristic  of  Co3O4  reduction,  while  the  profile  of  CoAl2O4-A  was  altered  in  the  whole  temperature  region  and  especially  by  the  appearance  of  new  peaks  in  the  region  of  temperatures  of  600–900oC.This  result  indicated  that  a  certain  amount  ofhard-to-reduce  cobalt  aluminate  is  generated  during  milling.  CVin  alkaline  solution  revealed  that  theoxidation/reduction  of  cobalt  in  CoAl2O4-Aoccurred  at  more  negative  potentials  compared  with  cobalt  in  Co3O4-A.Negative  shift  of  peak  potential  well  correlated  with  the  appearance  of  high-temperature  TPR  peak  and  could  be  ascribed  to  the cobalt phase which has lower tendency to get reduced. These findings encourage the idea of using the CV as low cost and rapid assay for distinguishing the cobalt phases onto alumina.
PB  - Belgrade: Serbian Ceramic Society
C3  - Program and the Book of Abstracts - The 9th Serbian Ceramics Society Conference ''Advanced Ceramics and Application'', Belgrade
T1  - Electrochemical characterization of cobalt phases onto alumina supported cobalt catalyst
SP  - 85
EP  - 85
UR  - https://hdl.handle.net/21.15107/rcub_cer_4780
ER  - 

@conference{
author = "Mudrinić, Tihana and Petrović, Srđan and Krstić, Jugoslav and Milovanović, Biljana and Pavlović, Stefan and Milutinović Nikolić, Aleksandra and Banković, Predrag",
year = "2021",
abstract = "This work describes the possible application of cyclic voltammetry (CV) for obtaining information  about  cobalt  phases  onto  alumina supported  cobalt  catalysts.Starting  from  the  same  amount  of  ingredients,  two  catalysts  with  different  phases  of  cobalt  were  prepared:  Co3O4-A  obtained  by  manual  grinding  of  Co3O4  and alumina  in  an  agate  mortar  and  CoAl2O4-A  obtained  mechanochemically  using  a  planetary  ball  mill.The  final  productswere characterized  by  the  temperature-programmed  reduction  (TPR)  and  CV.  The  TPR  profile  of  Co3O4-A  showed  peaks  between  200–500°C  characteristic  of  Co3O4  reduction,  while  the  profile  of  CoAl2O4-A  was  altered  in  the  whole  temperature  region  and  especially  by  the  appearance  of  new  peaks  in  the  region  of  temperatures  of  600–900oC.This  result  indicated  that  a  certain  amount  ofhard-to-reduce  cobalt  aluminate  is  generated  during  milling.  CVin  alkaline  solution  revealed  that  theoxidation/reduction  of  cobalt  in  CoAl2O4-Aoccurred  at  more  negative  potentials  compared  with  cobalt  in  Co3O4-A.Negative  shift  of  peak  potential  well  correlated  with  the  appearance  of  high-temperature  TPR  peak  and  could  be  ascribed  to  the cobalt phase which has lower tendency to get reduced. These findings encourage the idea of using the CV as low cost and rapid assay for distinguishing the cobalt phases onto alumina.",
publisher = "Belgrade: Serbian Ceramic Society",
journal = "Program and the Book of Abstracts - The 9th Serbian Ceramics Society Conference ''Advanced Ceramics and Application'', Belgrade",
title = "Electrochemical characterization of cobalt phases onto alumina supported cobalt catalyst",
pages = "85-85",
url = "https://hdl.handle.net/21.15107/rcub_cer_4780"
}

Mudrinić, T., Petrović, S., Krstić, J., Milovanović, B., Pavlović, S., Milutinović Nikolić, A.,& Banković, P.. (2021). Electrochemical characterization of cobalt phases onto alumina supported cobalt catalyst. in Program and the Book of Abstracts - The 9th Serbian Ceramics Society Conference ''Advanced Ceramics and Application'', Belgrade
Belgrade: Serbian Ceramic Society., 85-85.
https://hdl.handle.net/21.15107/rcub_cer_4780

Mudrinić T, Petrović S, Krstić J, Milovanović B, Pavlović S, Milutinović Nikolić A, Banković P. Electrochemical characterization of cobalt phases onto alumina supported cobalt catalyst. in Program and the Book of Abstracts - The 9th Serbian Ceramics Society Conference ''Advanced Ceramics and Application'', Belgrade. 2021;:85-85.
https://hdl.handle.net/21.15107/rcub_cer_4780 .

Mudrinić, Tihana, Petrović, Srđan, Krstić, Jugoslav, Milovanović, Biljana, Pavlović, Stefan, Milutinović Nikolić, Aleksandra, Banković, Predrag, "Electrochemical characterization of cobalt phases onto alumina supported cobalt catalyst" in Program and the Book of Abstracts - The 9th Serbian Ceramics Society Conference ''Advanced Ceramics and Application'', Belgrade (2021):85-85,
https://hdl.handle.net/21.15107/rcub_cer_4780 .

TY  - JOUR
AU  - Mojović, Zorica
AU  - Petrović, Srđan
AU  - Mojović, Miloš
AU  - Pavlović, Stefan
AU  - Rožić, Ljiljana
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3702
AB  - In this paper, the relationship of structure, type of oxygen defects, valence states of Cr and Ru, and electro-
chemical properties of La0.7Sr0.3Cr1-XRuXO3 (0 < x < 0.1) perovskite-type oxides were studied. The samples were 
synthesized by a conventional solid-state reaction method and characterized by powder X-ray diffraction, X-ray 
fluorescence spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, and electron 
paramagnetic resonance spectroscopy. The electrochemical performance of these samples was evaluated towards 
the detection of 4-nitrophenol and strongly depends on the concentration of ruthenium incorporated in the 
crystal lattice. A new La0.7Sr0.3Cr0.925Ru0.075O3 electrocatalyst with a wide linear concentration range (25–5000 
mM) and a detection limit of 8 mM was obtained. These results provide an opportunity for its application in the 
analysis of real water samples.
PB  - Elsevier
T2  - Journal of Physics and Chemistry of Solids
T1  - Ruthenium containing perovskites as electrode materials for  4-nitrophenol detection
VL  - 148
SP  - 109649
DO  - 10.1016/j.jpcs.2020.109649
ER  - 

@article{
author = "Mojović, Zorica and Petrović, Srđan and Mojović, Miloš and Pavlović, Stefan and Rožić, Ljiljana",
year = "2021",
abstract = "In this paper, the relationship of structure, type of oxygen defects, valence states of Cr and Ru, and electro-
chemical properties of La0.7Sr0.3Cr1-XRuXO3 (0 < x < 0.1) perovskite-type oxides were studied. The samples were 
synthesized by a conventional solid-state reaction method and characterized by powder X-ray diffraction, X-ray 
fluorescence spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, and electron 
paramagnetic resonance spectroscopy. The electrochemical performance of these samples was evaluated towards 
the detection of 4-nitrophenol and strongly depends on the concentration of ruthenium incorporated in the 
crystal lattice. A new La0.7Sr0.3Cr0.925Ru0.075O3 electrocatalyst with a wide linear concentration range (25–5000 
mM) and a detection limit of 8 mM was obtained. These results provide an opportunity for its application in the 
analysis of real water samples.",
publisher = "Elsevier",
journal = "Journal of Physics and Chemistry of Solids",
title = "Ruthenium containing perovskites as electrode materials for  4-nitrophenol detection",
volume = "148",
pages = "109649",
doi = "10.1016/j.jpcs.2020.109649"
}

Mojović, Z., Petrović, S., Mojović, M., Pavlović, S.,& Rožić, L.. (2021). Ruthenium containing perovskites as electrode materials for  4-nitrophenol detection. in Journal of Physics and Chemistry of Solids
Elsevier., 148, 109649.
https://doi.org/10.1016/j.jpcs.2020.109649

Mojović Z, Petrović S, Mojović M, Pavlović S, Rožić L. Ruthenium containing perovskites as electrode materials for  4-nitrophenol detection. in Journal of Physics and Chemistry of Solids. 2021;148:109649.
doi:10.1016/j.jpcs.2020.109649 .

Mojović, Zorica, Petrović, Srđan, Mojović, Miloš, Pavlović, Stefan, Rožić, Ljiljana, "Ruthenium containing perovskites as electrode materials for  4-nitrophenol detection" in Journal of Physics and Chemistry of Solids, 148 (2021):109649,
https://doi.org/10.1016/j.jpcs.2020.109649 . .

TY  - JOUR
AU  - Petrović, Srđan
AU  - Stanković, Miroslav
AU  - Pavlović, Stefan
AU  - Mojović, Zorica
AU  - Radić, Nenad
AU  - Mojović, Miloš
AU  - Rožić, Ljiljana
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4722
AB  - This paper presents a new two-step method for the synthesis of NiO/TiO2–CeO2 semiconductors, which implies, the first, the mechanochemical synthesis of TiO2–CeO2 support, and the second is the doping of different NiO contents by chemical precipitation in an aqueous medium in an ambient atmosphere. Structural, optical, electrochemical and photocatalytic properties of NiO/TiO2–CeO2 semiconductors were examined. The influence of different NiO contents on the electrocatalytic activity of NiO/TiO2–CeO2 samples was investigated in the oxygen evolution reaction and the results showed that the samples with the lowest NiO content have the highest electroactivity. The photocatalytic activity was determined during the phenol decomposition process over the samples with different NiO:TiO2–CeO2 ratios and the best photocatalytic activity is observed for the sample with 4.1 mol% NiO. The sample with the lowest NiO content obtained by a relatively simple method is suitable for use both as an electrode material in the oxygen evolution reaction and as a photocatalyst in the phenol decomposition process.
PB  - Springer
T2  - Reaction Kinetics, Mechanisms and Catalysis
T1  - Nickel oxide on mechanochemically synthesized TiO2–CeO2: photocatalytic and electrochemical activity
VL  - 133
SP  - 1097
EP  - 1110
DO  - 10.1007/s11144-021-02014-8
ER  - 

@article{
author = "Petrović, Srđan and Stanković, Miroslav and Pavlović, Stefan and Mojović, Zorica and Radić, Nenad and Mojović, Miloš and Rožić, Ljiljana",
year = "2021",
abstract = "This paper presents a new two-step method for the synthesis of NiO/TiO2–CeO2 semiconductors, which implies, the first, the mechanochemical synthesis of TiO2–CeO2 support, and the second is the doping of different NiO contents by chemical precipitation in an aqueous medium in an ambient atmosphere. Structural, optical, electrochemical and photocatalytic properties of NiO/TiO2–CeO2 semiconductors were examined. The influence of different NiO contents on the electrocatalytic activity of NiO/TiO2–CeO2 samples was investigated in the oxygen evolution reaction and the results showed that the samples with the lowest NiO content have the highest electroactivity. The photocatalytic activity was determined during the phenol decomposition process over the samples with different NiO:TiO2–CeO2 ratios and the best photocatalytic activity is observed for the sample with 4.1 mol% NiO. The sample with the lowest NiO content obtained by a relatively simple method is suitable for use both as an electrode material in the oxygen evolution reaction and as a photocatalyst in the phenol decomposition process.",
publisher = "Springer",
journal = "Reaction Kinetics, Mechanisms and Catalysis",
title = "Nickel oxide on mechanochemically synthesized TiO2–CeO2: photocatalytic and electrochemical activity",
volume = "133",
pages = "1097-1110",
doi = "10.1007/s11144-021-02014-8"
}

Petrović, S., Stanković, M., Pavlović, S., Mojović, Z., Radić, N., Mojović, M.,& Rožić, L.. (2021). Nickel oxide on mechanochemically synthesized TiO2–CeO2: photocatalytic and electrochemical activity. in Reaction Kinetics, Mechanisms and Catalysis
Springer., 133, 1097-1110.
https://doi.org/10.1007/s11144-021-02014-8

Petrović S, Stanković M, Pavlović S, Mojović Z, Radić N, Mojović M, Rožić L. Nickel oxide on mechanochemically synthesized TiO2–CeO2: photocatalytic and electrochemical activity. in Reaction Kinetics, Mechanisms and Catalysis. 2021;133:1097-1110.
doi:10.1007/s11144-021-02014-8 .

Petrović, Srđan, Stanković, Miroslav, Pavlović, Stefan, Mojović, Zorica, Radić, Nenad, Mojović, Miloš, Rožić, Ljiljana, "Nickel oxide on mechanochemically synthesized TiO2–CeO2: photocatalytic and electrochemical activity" in Reaction Kinetics, Mechanisms and Catalysis, 133 (2021):1097-1110,
https://doi.org/10.1007/s11144-021-02014-8 . .

TY  - JOUR
AU  - Milovanović, Stoja
AU  - Marković, Darka
AU  - Pantić, Milica
AU  - Pavlović, Stefan
AU  - Knapczyk-Korczak, Joanna
AU  - Stachewicz, Urszula
AU  - Novak, Zoran
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4746
AB  - The release of industrial wastewater into the ecosystem prompted our research on the development of an efficient and biodegradable material that can be used for wastewater treatment. We optimized preparation of porous material from poly(lactic acid) (PLA) by variation in solvents and drying methods (air-drying vs. supercritical CO2-drying). In addition, we optimized the method of TiO2 nanoparticles immobilization (in situ vs. ex situ) onto porous PLA. The material properties and functionality were verified by SEM, water displacement, gas adsorption-desorption, Hg-intrusion porosimetry, dye degradation, FTIR, TGA/DSC, and water contact angle analysis. We showed that the morphology of PLA material could be controlled by variation in process parameters resulting in porosity from 43% to 73%. The prepared material sustained floatability for longer than 4 weeks and provided complete discoloration of dye C.I. Acid Orange 7 after 240 min of illumination. The high photocatalytic activity was preserved within three repeated cycles.
PB  - Elsevier
T2  - The Journal of Supercritical Fluids
T1  - Development of advanced floating poly(lactic acid)-based materials for colored wastewater treatment
VL  - 177
SP  - 105328
DO  - 10.1016/j.supflu.2021.105328
ER  - 

@article{
author = "Milovanović, Stoja and Marković, Darka and Pantić, Milica and Pavlović, Stefan and Knapczyk-Korczak, Joanna and Stachewicz, Urszula and Novak, Zoran",
year = "2021",
abstract = "The release of industrial wastewater into the ecosystem prompted our research on the development of an efficient and biodegradable material that can be used for wastewater treatment. We optimized preparation of porous material from poly(lactic acid) (PLA) by variation in solvents and drying methods (air-drying vs. supercritical CO2-drying). In addition, we optimized the method of TiO2 nanoparticles immobilization (in situ vs. ex situ) onto porous PLA. The material properties and functionality were verified by SEM, water displacement, gas adsorption-desorption, Hg-intrusion porosimetry, dye degradation, FTIR, TGA/DSC, and water contact angle analysis. We showed that the morphology of PLA material could be controlled by variation in process parameters resulting in porosity from 43% to 73%. The prepared material sustained floatability for longer than 4 weeks and provided complete discoloration of dye C.I. Acid Orange 7 after 240 min of illumination. The high photocatalytic activity was preserved within three repeated cycles.",
publisher = "Elsevier",
journal = "The Journal of Supercritical Fluids",
title = "Development of advanced floating poly(lactic acid)-based materials for colored wastewater treatment",
volume = "177",
pages = "105328",
doi = "10.1016/j.supflu.2021.105328"
}

Milovanović, S., Marković, D., Pantić, M., Pavlović, S., Knapczyk-Korczak, J., Stachewicz, U.,& Novak, Z.. (2021). Development of advanced floating poly(lactic acid)-based materials for colored wastewater treatment. in The Journal of Supercritical Fluids
Elsevier., 177, 105328.
https://doi.org/10.1016/j.supflu.2021.105328

Milovanović S, Marković D, Pantić M, Pavlović S, Knapczyk-Korczak J, Stachewicz U, Novak Z. Development of advanced floating poly(lactic acid)-based materials for colored wastewater treatment. in The Journal of Supercritical Fluids. 2021;177:105328.
doi:10.1016/j.supflu.2021.105328 .

Milovanović, Stoja, Marković, Darka, Pantić, Milica, Pavlović, Stefan, Knapczyk-Korczak, Joanna, Stachewicz, Urszula, Novak, Zoran, "Development of advanced floating poly(lactic acid)-based materials for colored wastewater treatment" in The Journal of Supercritical Fluids, 177 (2021):105328,
https://doi.org/10.1016/j.supflu.2021.105328 . .

TY  - CONF
AU  - Pavlović, Stefan
AU  - Marinković, Dalibor
AU  - Milovanović, Biljana
AU  - Tišma, Marina
AU  - Mojović, Ljiljana
AU  - Stanković, Miroslav
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4721
AB  - Waste-based zeolite supported CaO catalyst (20CaO/ZMFA) was synthesized by ultrasound-assisted impregnation from alcoholic suspension. Zeolite was previously synthesized from lignite coal fly ash (FA) by alkali activation in miniature rotating autoclave reactors (6.25 M NaOH, 260 °C, 4 h), whereas CaO was prepared by chicken eggshell (ES) calcination (900 ºC, 4 h). The final catalyst was obtained by precursor calcination at 550 °C, 4 h. The obtained catalyst was used for catalyst stability tests (reusability and leaching) in transesterification (methanol/oil molar ratio of 12/1, catalyst concentration of 4 wt%, and temperature of 60 °C) of three types of oily feedstocks, fresh sunflower oil (SFO), waste cooking oil (WCO) and model thermal treated (230 °C, 5 days) sunflower oil (SFOTT). The concentration of triacylglycerols (TAGs) and fatty acid methyl esters (FAMEs) was determined by GC and HPLC, respectively. The 20CaO/ZMFA exhibited high activity (FAME content > 96.5 % for 180 min) in the transesterification of all three oily feedstocks. The stability tests are shown that catalyst is stable even in four reaction cycles for SFO and WCO, whereas the Ca 2+ leaching was significantly lower compared to similar catalytic systems.
PB  - Fuel Science Center
C3  - 9th International Conference Fuel Science - From Production to Propulsion 2021
T1  - Stability of waste-based zeolite supported CaO catalyst for biodiesel production from waste oily feedstocks
UR  - https://hdl.handle.net/21.15107/rcub_cer_4721
ER  - 

@conference{
author = "Pavlović, Stefan and Marinković, Dalibor and Milovanović, Biljana and Tišma, Marina and Mojović, Ljiljana and Stanković, Miroslav",
year = "2021",
abstract = "Waste-based zeolite supported CaO catalyst (20CaO/ZMFA) was synthesized by ultrasound-assisted impregnation from alcoholic suspension. Zeolite was previously synthesized from lignite coal fly ash (FA) by alkali activation in miniature rotating autoclave reactors (6.25 M NaOH, 260 °C, 4 h), whereas CaO was prepared by chicken eggshell (ES) calcination (900 ºC, 4 h). The final catalyst was obtained by precursor calcination at 550 °C, 4 h. The obtained catalyst was used for catalyst stability tests (reusability and leaching) in transesterification (methanol/oil molar ratio of 12/1, catalyst concentration of 4 wt%, and temperature of 60 °C) of three types of oily feedstocks, fresh sunflower oil (SFO), waste cooking oil (WCO) and model thermal treated (230 °C, 5 days) sunflower oil (SFOTT). The concentration of triacylglycerols (TAGs) and fatty acid methyl esters (FAMEs) was determined by GC and HPLC, respectively. The 20CaO/ZMFA exhibited high activity (FAME content > 96.5 % for 180 min) in the transesterification of all three oily feedstocks. The stability tests are shown that catalyst is stable even in four reaction cycles for SFO and WCO, whereas the Ca 2+ leaching was significantly lower compared to similar catalytic systems.",
publisher = "Fuel Science Center",
journal = "9th International Conference Fuel Science - From Production to Propulsion 2021",
title = "Stability of waste-based zeolite supported CaO catalyst for biodiesel production from waste oily feedstocks",
url = "https://hdl.handle.net/21.15107/rcub_cer_4721"
}

Pavlović, S., Marinković, D., Milovanović, B., Tišma, M., Mojović, L.,& Stanković, M.. (2021). Stability of waste-based zeolite supported CaO catalyst for biodiesel production from waste oily feedstocks. in 9th International Conference Fuel Science - From Production to Propulsion 2021
Fuel Science Center..
https://hdl.handle.net/21.15107/rcub_cer_4721

Pavlović S, Marinković D, Milovanović B, Tišma M, Mojović L, Stanković M. Stability of waste-based zeolite supported CaO catalyst for biodiesel production from waste oily feedstocks. in 9th International Conference Fuel Science - From Production to Propulsion 2021. 2021;.
https://hdl.handle.net/21.15107/rcub_cer_4721 .

Pavlović, Stefan, Marinković, Dalibor, Milovanović, Biljana, Tišma, Marina, Mojović, Ljiljana, Stanković, Miroslav, "Stability of waste-based zeolite supported CaO catalyst for biodiesel production from waste oily feedstocks" in 9th International Conference Fuel Science - From Production to Propulsion 2021 (2021),
https://hdl.handle.net/21.15107/rcub_cer_4721 .

TY  - CONF
AU  - Novaković, Tanja
AU  - Milovanović, Biljana
AU  - Pavlović, Stefan
AU  - Banković, Predrag
AU  - Mojović, Zorica
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4781
AB  - Alumina oxyhydrates have different structural and textural properties, as well as different density of surface functional groups. Three alumina oxyhydrates with different water content, 3mol H2O/ mol Al2O3 (gibbsite), 1mol H2O/ mol Al2O3 (boehmite) and 0.6 mol H2O/ mol Al2O3 (α,γ-alumina phase), were used in this study. The samples were used as modifiers of carbon paste electrode. Their electrochemical behavior toward ferricyanide/ferrocyanide redox probe was evaluated by electrochemical impedance spectroscopy and cyclic voltammetry. 
 Ferricyanide/ferrocyanide redox system has a well-known electrochemical behavior and is sensitive to the changes occurring at the electrode surface. The lowest charge transfer resistance was obtained for α,γ-alumina phase. The redox process of ferri/ferro redox probe on investigated electrodes exhibited a quasi-reversible behavior, since the obtained values of peak-to-peak separation are greater than 59 mV value expected for a reversible process. The response toward quinone/hydroquinone redox probe was evaluated by cyclic voltammetry in buffered solutions at various pH. Gibbsite and boehmite showed expected response, while the surface groups of α,γ-alumina phase enabled quinone oxidation to proceed through two pathways simultaneously. The surface chemistry of investigated samples influenced their electrochemical properties.
PB  - Belgrade: Serbian Ceramic Society
C3  - Program and the Book of Abstracts - The nineth Serbian Ceramics Society Conference ''Advanced Ceramics and Application'', Belgrade
T1  - Insights into the effect of aluminum oxyhydrates properties on their electrochemical behavior
SP  - 89
EP  - 89
UR  - https://hdl.handle.net/21.15107/rcub_cer_4781
ER  - 

@conference{
author = "Novaković, Tanja and Milovanović, Biljana and Pavlović, Stefan and Banković, Predrag and Mojović, Zorica",
year = "2021",
abstract = "Alumina oxyhydrates have different structural and textural properties, as well as different density of surface functional groups. Three alumina oxyhydrates with different water content, 3mol H2O/ mol Al2O3 (gibbsite), 1mol H2O/ mol Al2O3 (boehmite) and 0.6 mol H2O/ mol Al2O3 (α,γ-alumina phase), were used in this study. The samples were used as modifiers of carbon paste electrode. Their electrochemical behavior toward ferricyanide/ferrocyanide redox probe was evaluated by electrochemical impedance spectroscopy and cyclic voltammetry. 
 Ferricyanide/ferrocyanide redox system has a well-known electrochemical behavior and is sensitive to the changes occurring at the electrode surface. The lowest charge transfer resistance was obtained for α,γ-alumina phase. The redox process of ferri/ferro redox probe on investigated electrodes exhibited a quasi-reversible behavior, since the obtained values of peak-to-peak separation are greater than 59 mV value expected for a reversible process. The response toward quinone/hydroquinone redox probe was evaluated by cyclic voltammetry in buffered solutions at various pH. Gibbsite and boehmite showed expected response, while the surface groups of α,γ-alumina phase enabled quinone oxidation to proceed through two pathways simultaneously. The surface chemistry of investigated samples influenced their electrochemical properties.",
publisher = "Belgrade: Serbian Ceramic Society",
journal = "Program and the Book of Abstracts - The nineth Serbian Ceramics Society Conference ''Advanced Ceramics and Application'', Belgrade",
title = "Insights into the effect of aluminum oxyhydrates properties on their electrochemical behavior",
pages = "89-89",
url = "https://hdl.handle.net/21.15107/rcub_cer_4781"
}

Novaković, T., Milovanović, B., Pavlović, S., Banković, P.,& Mojović, Z.. (2021). Insights into the effect of aluminum oxyhydrates properties on their electrochemical behavior. in Program and the Book of Abstracts - The nineth Serbian Ceramics Society Conference ''Advanced Ceramics and Application'', Belgrade
Belgrade: Serbian Ceramic Society., 89-89.
https://hdl.handle.net/21.15107/rcub_cer_4781

Novaković T, Milovanović B, Pavlović S, Banković P, Mojović Z. Insights into the effect of aluminum oxyhydrates properties on their electrochemical behavior. in Program and the Book of Abstracts - The nineth Serbian Ceramics Society Conference ''Advanced Ceramics and Application'', Belgrade. 2021;:89-89.
https://hdl.handle.net/21.15107/rcub_cer_4781 .

Novaković, Tanja, Milovanović, Biljana, Pavlović, Stefan, Banković, Predrag, Mojović, Zorica, "Insights into the effect of aluminum oxyhydrates properties on their electrochemical behavior" in Program and the Book of Abstracts - The nineth Serbian Ceramics Society Conference ''Advanced Ceramics and Application'', Belgrade (2021):89-89,
https://hdl.handle.net/21.15107/rcub_cer_4781 .

TY  - JOUR
AU  - Pavlović, Stefan
AU  - Marinković, Dalibor
AU  - Kostić, Milan
AU  - Lončarević, Davor
AU  - Mojović, Ljiljana
AU  - Stanković, Miroslav
AU  - Veljković, Vlada B.
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4035
AB  - Lignite coal fly ash (FA) from a domestic thermal power plant was converted into a pure cancrinite zeolitic material (ZMFA) using a novel, custom-made, rotating autoclave reactor system by a short-term alkali activation process. The obtained ZMFA was used as catalyst support of calcium oxide as an active component derived from waste chicken eggshells (ES). The ZMFA supported calcium oxide catalyst (xCaO/ZMFA) was synthesized by means of the ultrasound-assisted method. The influence of different concentrations of dispersed calcium oxide (x = 5–20 wt%) over ZMFA and thermal treatment at different temperatures (450–600 °C) were studied. The structural and morphological characterization showed that the original cancrinite structure was preserved. The basicity and textural properties indicated the presence of strong active sites in a well-defined pore network suitable for the reactions of bulky organic compounds such as triacylglycerols (TAGs). The highest activity (96.5% of fatty acid methyl esters) in the methanolysis of sunflower oil was achieved with the 20CaO/ZMFA catalyst under reaction conditions: temperature of 60 °C, methanol/oil molar ratio of 12:1, catalyst concentration of 4 wt%, and reaction time of 2 h. It was found that the optimal calcination temperature of the catalyst precursor was 550 °C. At calcination temperatures above 550 °C, the melting of the glassy phase became more intense whereby the molten phase partially reacted with calcium oxide forming the catalytically inactive calcium silicate compounds (wollastonite, larnite, etc.). The rate constants of the two tested kinetic models were correlated with the concentrations of active calcium oxide. The MRPD of both models was low indicating their reliability.
PB  - Elsevier
T2  - Fuel
T1  - The chicken eggshell calcium oxide ultrasonically dispersed over lignite coal fly ash-based cancrinite zeolite support as a catalyst for biodiesel production
VL  - 289
SP  - 119912
DO  - 10.1016/j.fuel.2020.119912
ER  - 

@article{
author = "Pavlović, Stefan and Marinković, Dalibor and Kostić, Milan and Lončarević, Davor and Mojović, Ljiljana and Stanković, Miroslav and Veljković, Vlada B.",
year = "2021",
abstract = "Lignite coal fly ash (FA) from a domestic thermal power plant was converted into a pure cancrinite zeolitic material (ZMFA) using a novel, custom-made, rotating autoclave reactor system by a short-term alkali activation process. The obtained ZMFA was used as catalyst support of calcium oxide as an active component derived from waste chicken eggshells (ES). The ZMFA supported calcium oxide catalyst (xCaO/ZMFA) was synthesized by means of the ultrasound-assisted method. The influence of different concentrations of dispersed calcium oxide (x = 5–20 wt%) over ZMFA and thermal treatment at different temperatures (450–600 °C) were studied. The structural and morphological characterization showed that the original cancrinite structure was preserved. The basicity and textural properties indicated the presence of strong active sites in a well-defined pore network suitable for the reactions of bulky organic compounds such as triacylglycerols (TAGs). The highest activity (96.5% of fatty acid methyl esters) in the methanolysis of sunflower oil was achieved with the 20CaO/ZMFA catalyst under reaction conditions: temperature of 60 °C, methanol/oil molar ratio of 12:1, catalyst concentration of 4 wt%, and reaction time of 2 h. It was found that the optimal calcination temperature of the catalyst precursor was 550 °C. At calcination temperatures above 550 °C, the melting of the glassy phase became more intense whereby the molten phase partially reacted with calcium oxide forming the catalytically inactive calcium silicate compounds (wollastonite, larnite, etc.). The rate constants of the two tested kinetic models were correlated with the concentrations of active calcium oxide. The MRPD of both models was low indicating their reliability.",
publisher = "Elsevier",
journal = "Fuel",
title = "The chicken eggshell calcium oxide ultrasonically dispersed over lignite coal fly ash-based cancrinite zeolite support as a catalyst for biodiesel production",
volume = "289",
pages = "119912",
doi = "10.1016/j.fuel.2020.119912"
}

Pavlović, S., Marinković, D., Kostić, M., Lončarević, D., Mojović, L., Stanković, M.,& Veljković, V. B.. (2021). The chicken eggshell calcium oxide ultrasonically dispersed over lignite coal fly ash-based cancrinite zeolite support as a catalyst for biodiesel production. in Fuel
Elsevier., 289, 119912.
https://doi.org/10.1016/j.fuel.2020.119912

Pavlović S, Marinković D, Kostić M, Lončarević D, Mojović L, Stanković M, Veljković VB. The chicken eggshell calcium oxide ultrasonically dispersed over lignite coal fly ash-based cancrinite zeolite support as a catalyst for biodiesel production. in Fuel. 2021;289:119912.
doi:10.1016/j.fuel.2020.119912 .

Pavlović, Stefan, Marinković, Dalibor, Kostić, Milan, Lončarević, Davor, Mojović, Ljiljana, Stanković, Miroslav, Veljković, Vlada B., "The chicken eggshell calcium oxide ultrasonically dispersed over lignite coal fly ash-based cancrinite zeolite support as a catalyst for biodiesel production" in Fuel, 289 (2021):119912,
https://doi.org/10.1016/j.fuel.2020.119912 . .

TY  - JOUR
AU  - Madžarević, Marijana
AU  - Medarević, Đorđe
AU  - Pavlović, Stefan
AU  - Ivković, Branka
AU  - Đuriš, Jelena
AU  - Ibrić, Svetlana
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4852
AB  - Selective laser sintering (SLS) is a rapid prototyping technique for the production of three-dimensional objects through selectively sintering powder-based layer materials. The aim of the study was to investigate the effect of energy density (ED) and formulation factors on the printability and characteristics of SLS irbesartan tablets. The correlation between formulation factors, ED, and printability was obtained using a decision tree model with an accuracy of 80%. FT-IR results revealed that there was no interaction between irbesartan and the applied excipients. DSC results indicated that irbesartan was present in an amorphous form in printed tablets. ED had a significant influence on tablets' physical, mechanical, and morphological characteristics. Adding lactose mon-ohydrate enabled faster drug release while reducing the possibility for printing with different laser speeds. However, formulations with crospovidone were printable with a wider range of laser speeds. The adjustment of formulation and process parameters enabled the production of SLS tablets with hydroxypropyl methylcellulose with complete release in less than 30 min. The results suggest that a decision tree could be a useful tool for predicting the printability of pharmaceutical formulations. Tailoring the characteristics of SLS irbesartan tablets by ED is possible; however, it needs to be governed by the composition of the whole formulation.
PB  - MDPI
T2  - Pharmaceutics
T1  - Understanding the Effect of Energy Density and Formulation Factors on the Printability and Characteristics of SLS Irbesartan Tablets-Application of the Decision Tree Model
VL  - 13
IS  - 11
SP  - 1969
DO  - 10.3390/pharmaceutics13111969
ER  - 

@article{
author = "Madžarević, Marijana and Medarević, Đorđe and Pavlović, Stefan and Ivković, Branka and Đuriš, Jelena and Ibrić, Svetlana",
year = "2021",
abstract = "Selective laser sintering (SLS) is a rapid prototyping technique for the production of three-dimensional objects through selectively sintering powder-based layer materials. The aim of the study was to investigate the effect of energy density (ED) and formulation factors on the printability and characteristics of SLS irbesartan tablets. The correlation between formulation factors, ED, and printability was obtained using a decision tree model with an accuracy of 80%. FT-IR results revealed that there was no interaction between irbesartan and the applied excipients. DSC results indicated that irbesartan was present in an amorphous form in printed tablets. ED had a significant influence on tablets' physical, mechanical, and morphological characteristics. Adding lactose mon-ohydrate enabled faster drug release while reducing the possibility for printing with different laser speeds. However, formulations with crospovidone were printable with a wider range of laser speeds. The adjustment of formulation and process parameters enabled the production of SLS tablets with hydroxypropyl methylcellulose with complete release in less than 30 min. The results suggest that a decision tree could be a useful tool for predicting the printability of pharmaceutical formulations. Tailoring the characteristics of SLS irbesartan tablets by ED is possible; however, it needs to be governed by the composition of the whole formulation.",
publisher = "MDPI",
journal = "Pharmaceutics",
title = "Understanding the Effect of Energy Density and Formulation Factors on the Printability and Characteristics of SLS Irbesartan Tablets-Application of the Decision Tree Model",
volume = "13",
number = "11",
pages = "1969",
doi = "10.3390/pharmaceutics13111969"
}

Madžarević, M., Medarević, Đ., Pavlović, S., Ivković, B., Đuriš, J.,& Ibrić, S.. (2021). Understanding the Effect of Energy Density and Formulation Factors on the Printability and Characteristics of SLS Irbesartan Tablets-Application of the Decision Tree Model. in Pharmaceutics
MDPI., 13(11), 1969.
https://doi.org/10.3390/pharmaceutics13111969

Madžarević M, Medarević Đ, Pavlović S, Ivković B, Đuriš J, Ibrić S. Understanding the Effect of Energy Density and Formulation Factors on the Printability and Characteristics of SLS Irbesartan Tablets-Application of the Decision Tree Model. in Pharmaceutics. 2021;13(11):1969.
doi:10.3390/pharmaceutics13111969 .

Madžarević, Marijana, Medarević, Đorđe, Pavlović, Stefan, Ivković, Branka, Đuriš, Jelena, Ibrić, Svetlana, "Understanding the Effect of Energy Density and Formulation Factors on the Printability and Characteristics of SLS Irbesartan Tablets-Application of the Decision Tree Model" in Pharmaceutics, 13, no. 11 (2021):1969,
https://doi.org/10.3390/pharmaceutics13111969 . .

TY  - JOUR
AU  - Mudrić, Jelena
AU  - Šavikin, Katarina
AU  - Đekić, Ljiljana
AU  - Pavlović, Stefan
AU  - Kurćubić, Ivana
AU  - Ibrić, Svetlana
AU  - Đuriš, Jelena
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4891
AB  - Gentian (Gentiana lutea L., Gentianaceae) root extract (GRE) is used for the treatment of gastrointestinal disorders. However, its bioactive potential is limited in conventional forms due to the low bioavailability and short elimination half-life of the dominant bioactive compound, gentiopicroside. The aim of study was to encapsulate GRE in the lipid-based gastroretentive delivery system that could provide high yield and encapsulation efficiency, as well as the biphasic release of gentiopicroside from the tablets obtained by direct compression. Solid lipid microparticles (SLM) loaded with GRE were prepared by freeze-drying double (W/O/W) emulsions, which were obtained by a multiple emulsion–melt dispersion technique, with GRE as the inner water phase, Gelucire® 39/01 or 43/01, as lipid components, with or without the addition of porous silica (Sylysia® 350) in the outer water phase. Formulated SLM powders were examined by SEM and mercury intrusion porosimetry, as well as by determination of yield, encapsulation efficiency, and flow properties. Furthermore, in vitro dissolution of gentiopicroside, the size of the dispersed systems, mechanical properties, and mucoadhesion of tablets obtained by direct compression were investigated. The results have revealed that SLM with the macroporous structure were formulated, and, consequently, the powders floated immediately in the acidic medium. Formulation with porous silica (Sylysia® 350) and Gelucire® 43/01 as a solid lipid was characterized with the high yield end encapsulation efficiency. Furthermore, the mucoadhesive properties of tablets obtained by direct compression of that formulation, as well as the biphasic release of gentiopicroside, presence of nanoassociates in dissolution medium, and optimal mechanical properties indicated that a promising lipid-based gastroretentive system for GRE was developed.
PB  - MDPI
T2  - Pharmaceutics
T1  - Development of Lipid-Based Gastroretentive Delivery System for Gentian Extract by Double Emulsion-Melt Dispersion Technique
VL  - 13
IS  - 12
SP  - 2095
DO  - 10.3390/pharmaceutics13122095
ER  - 

@article{
author = "Mudrić, Jelena and Šavikin, Katarina and Đekić, Ljiljana and Pavlović, Stefan and Kurćubić, Ivana and Ibrić, Svetlana and Đuriš, Jelena",
year = "2021",
abstract = "Gentian (Gentiana lutea L., Gentianaceae) root extract (GRE) is used for the treatment of gastrointestinal disorders. However, its bioactive potential is limited in conventional forms due to the low bioavailability and short elimination half-life of the dominant bioactive compound, gentiopicroside. The aim of study was to encapsulate GRE in the lipid-based gastroretentive delivery system that could provide high yield and encapsulation efficiency, as well as the biphasic release of gentiopicroside from the tablets obtained by direct compression. Solid lipid microparticles (SLM) loaded with GRE were prepared by freeze-drying double (W/O/W) emulsions, which were obtained by a multiple emulsion–melt dispersion technique, with GRE as the inner water phase, Gelucire® 39/01 or 43/01, as lipid components, with or without the addition of porous silica (Sylysia® 350) in the outer water phase. Formulated SLM powders were examined by SEM and mercury intrusion porosimetry, as well as by determination of yield, encapsulation efficiency, and flow properties. Furthermore, in vitro dissolution of gentiopicroside, the size of the dispersed systems, mechanical properties, and mucoadhesion of tablets obtained by direct compression were investigated. The results have revealed that SLM with the macroporous structure were formulated, and, consequently, the powders floated immediately in the acidic medium. Formulation with porous silica (Sylysia® 350) and Gelucire® 43/01 as a solid lipid was characterized with the high yield end encapsulation efficiency. Furthermore, the mucoadhesive properties of tablets obtained by direct compression of that formulation, as well as the biphasic release of gentiopicroside, presence of nanoassociates in dissolution medium, and optimal mechanical properties indicated that a promising lipid-based gastroretentive system for GRE was developed.",
publisher = "MDPI",
journal = "Pharmaceutics",
title = "Development of Lipid-Based Gastroretentive Delivery System for Gentian Extract by Double Emulsion-Melt Dispersion Technique",
volume = "13",
number = "12",
pages = "2095",
doi = "10.3390/pharmaceutics13122095"
}

Mudrić, J., Šavikin, K., Đekić, L., Pavlović, S., Kurćubić, I., Ibrić, S.,& Đuriš, J.. (2021). Development of Lipid-Based Gastroretentive Delivery System for Gentian Extract by Double Emulsion-Melt Dispersion Technique. in Pharmaceutics
MDPI., 13(12), 2095.
https://doi.org/10.3390/pharmaceutics13122095

Mudrić J, Šavikin K, Đekić L, Pavlović S, Kurćubić I, Ibrić S, Đuriš J. Development of Lipid-Based Gastroretentive Delivery System for Gentian Extract by Double Emulsion-Melt Dispersion Technique. in Pharmaceutics. 2021;13(12):2095.
doi:10.3390/pharmaceutics13122095 .

Mudrić, Jelena, Šavikin, Katarina, Đekić, Ljiljana, Pavlović, Stefan, Kurćubić, Ivana, Ibrić, Svetlana, Đuriš, Jelena, "Development of Lipid-Based Gastroretentive Delivery System for Gentian Extract by Double Emulsion-Melt Dispersion Technique" in Pharmaceutics, 13, no. 12 (2021):2095,
https://doi.org/10.3390/pharmaceutics13122095 . .

TY  - JOUR
AU  - Pavlović, Stefan
AU  - Šelo, Gordana
AU  - Marinković, Dalibor
AU  - Planinić, Mirela
AU  - Tišma, Marina
AU  - Stanković, Miroslav
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4138
AB  - The statistical experimental design (DoE) and optimization (Response Surface Methodology combined with Box–Behnken design) of sunflower oil transesterification catalyzed by waste chicken eggshell-based catalyst were conducted in a custom-made microreactor at 60 °C. The catalyst was synthesized by the hydration–dehydration method and subsequent calcination at 600 °C. Comprehensive characterization of the obtained catalyst was conducted using: X-ray powder diffractometry (XRD), X-ray fluorescence (XRF), Fourier-transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), N2 physisorption, and Hg-porosimetry. Structural, morphological, and textural results showed that the obtained catalyst exhibited high porosity and regular dispersity of plate-like CaO as an active species. The obtained optimal residence time, catalyst concentration, and methanol/oil volume ratio for the continuous reaction in microreactor were 10 min, 0.1 g g−1, and 3:1, respectively. The analysis of variance (ANOVA) showed that the obtained reduced quadratic model was adequate for experimental results fitting. The reaction in the microreactor was significantly intensified compared to a conventional batch reactor, as seen through the fatty acid methyl esters (FAMEs) content after 10 min, which was 51.2% and 18.6%, respectively.
PB  - MDPI
T2  - Micromachines
T1  - Transesterification of Sunflower Oil Over Waste Chicken Eggshell-Based Catalyst in a Microreactor: An Optimization Study
VL  - 12
IS  - 2
SP  - 120
DO  - 10.3390/mi12020120
ER  - 

@article{
author = "Pavlović, Stefan and Šelo, Gordana and Marinković, Dalibor and Planinić, Mirela and Tišma, Marina and Stanković, Miroslav",
year = "2021",
abstract = "The statistical experimental design (DoE) and optimization (Response Surface Methodology combined with Box–Behnken design) of sunflower oil transesterification catalyzed by waste chicken eggshell-based catalyst were conducted in a custom-made microreactor at 60 °C. The catalyst was synthesized by the hydration–dehydration method and subsequent calcination at 600 °C. Comprehensive characterization of the obtained catalyst was conducted using: X-ray powder diffractometry (XRD), X-ray fluorescence (XRF), Fourier-transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), N2 physisorption, and Hg-porosimetry. Structural, morphological, and textural results showed that the obtained catalyst exhibited high porosity and regular dispersity of plate-like CaO as an active species. The obtained optimal residence time, catalyst concentration, and methanol/oil volume ratio for the continuous reaction in microreactor were 10 min, 0.1 g g−1, and 3:1, respectively. The analysis of variance (ANOVA) showed that the obtained reduced quadratic model was adequate for experimental results fitting. The reaction in the microreactor was significantly intensified compared to a conventional batch reactor, as seen through the fatty acid methyl esters (FAMEs) content after 10 min, which was 51.2% and 18.6%, respectively.",
publisher = "MDPI",
journal = "Micromachines",
title = "Transesterification of Sunflower Oil Over Waste Chicken Eggshell-Based Catalyst in a Microreactor: An Optimization Study",
volume = "12",
number = "2",
pages = "120",
doi = "10.3390/mi12020120"
}

Pavlović, S., Šelo, G., Marinković, D., Planinić, M., Tišma, M.,& Stanković, M.. (2021). Transesterification of Sunflower Oil Over Waste Chicken Eggshell-Based Catalyst in a Microreactor: An Optimization Study. in Micromachines
MDPI., 12(2), 120.
https://doi.org/10.3390/mi12020120

Pavlović S, Šelo G, Marinković D, Planinić M, Tišma M, Stanković M. Transesterification of Sunflower Oil Over Waste Chicken Eggshell-Based Catalyst in a Microreactor: An Optimization Study. in Micromachines. 2021;12(2):120.
doi:10.3390/mi12020120 .

Pavlović, Stefan, Šelo, Gordana, Marinković, Dalibor, Planinić, Mirela, Tišma, Marina, Stanković, Miroslav, "Transesterification of Sunflower Oil Over Waste Chicken Eggshell-Based Catalyst in a Microreactor: An Optimization Study" in Micromachines, 12, no. 2 (2021):120,
https://doi.org/10.3390/mi12020120 . .