TY  - JOUR
AU  - Dostanić, Jasmina
AU  - Lončarević, Davor
AU  - Banković, Predrag
AU  - Cvetković, Olga
AU  - Jovanović, Dušan M.
AU  - Mijin, Dušan
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1924
AB  - Photocatalytic degradation of synthesized azo pyridone dye (5-(4-sulpho phenylazo)-6-hydroxy-4-methyl-3-cyano-2-pyridone), in aqueous solutions by simulated sunlight in the presence of commercial TiO2, Aeroxide P25, was studied. The reaction kinetics analysis showed that photodegradation exhibits pseudo first-order kinetics according to Langmuir-Hinshelwood model. The effects of various process parameters on the photocatalytic degradation were investigated. The optimal catalyst content and pH were determined. A decrease in the reaction rate was observed upon the increase of the initial dye concentration. Degradation of the dye was enhanced by hydrogen peroxide, but it was inhibited by ethanol. The influence of temperature was studied, and the energy of activation was determined. According to total organic carbon (TOC) analysis, 54% of TOC remained when 100% of the dye was decolorized. Although the intermediates were not determined in this study, the TOC results clearly indicate their presence during the reaction. In addition, photocatalytic degradation of simulated dyehouse effluents, containing tested azo pyridone dye and associated auxiliary chemicals was investigated.
PB  - Taylor & Francis Inc, Philadelphia
T2  - Journal of Environmental Science and Health Part A-Toxic/Hazardous Substances & Environmental Engine
T1  - Influence of process parameters on the photodegradation of synthesized azo pyridone dye in TiO2 water suspension under simulated sunlight
EP  - 79
IS  - 1
SP  - 70
VL  - 46
DO  - 10.1080/10934529.2011.526905
ER  - 

@article{
author = "Dostanić, Jasmina and Lončarević, Davor and Banković, Predrag and Cvetković, Olga and Jovanović, Dušan M. and Mijin, Dušan",
year = "2011",
abstract = "Photocatalytic degradation of synthesized azo pyridone dye (5-(4-sulpho phenylazo)-6-hydroxy-4-methyl-3-cyano-2-pyridone), in aqueous solutions by simulated sunlight in the presence of commercial TiO2, Aeroxide P25, was studied. The reaction kinetics analysis showed that photodegradation exhibits pseudo first-order kinetics according to Langmuir-Hinshelwood model. The effects of various process parameters on the photocatalytic degradation were investigated. The optimal catalyst content and pH were determined. A decrease in the reaction rate was observed upon the increase of the initial dye concentration. Degradation of the dye was enhanced by hydrogen peroxide, but it was inhibited by ethanol. The influence of temperature was studied, and the energy of activation was determined. According to total organic carbon (TOC) analysis, 54% of TOC remained when 100% of the dye was decolorized. Although the intermediates were not determined in this study, the TOC results clearly indicate their presence during the reaction. In addition, photocatalytic degradation of simulated dyehouse effluents, containing tested azo pyridone dye and associated auxiliary chemicals was investigated.",
publisher = "Taylor & Francis Inc, Philadelphia",
journal = "Journal of Environmental Science and Health Part A-Toxic/Hazardous Substances & Environmental Engine",
title = "Influence of process parameters on the photodegradation of synthesized azo pyridone dye in TiO2 water suspension under simulated sunlight",
pages = "79-70",
number = "1",
volume = "46",
doi = "10.1080/10934529.2011.526905"
}

Dostanić, J., Lončarević, D., Banković, P., Cvetković, O., Jovanović, D. M.,& Mijin, D.. (2011). Influence of process parameters on the photodegradation of synthesized azo pyridone dye in TiO2 water suspension under simulated sunlight. in Journal of Environmental Science and Health Part A-Toxic/Hazardous Substances & Environmental Engine
Taylor & Francis Inc, Philadelphia., 46(1), 70-79.
https://doi.org/10.1080/10934529.2011.526905

Dostanić J, Lončarević D, Banković P, Cvetković O, Jovanović DM, Mijin D. Influence of process parameters on the photodegradation of synthesized azo pyridone dye in TiO2 water suspension under simulated sunlight. in Journal of Environmental Science and Health Part A-Toxic/Hazardous Substances & Environmental Engine. 2011;46(1):70-79.
doi:10.1080/10934529.2011.526905 .

Dostanić, Jasmina, Lončarević, Davor, Banković, Predrag, Cvetković, Olga, Jovanović, Dušan M., Mijin, Dušan, "Influence of process parameters on the photodegradation of synthesized azo pyridone dye in TiO2 water suspension under simulated sunlight" in Journal of Environmental Science and Health Part A-Toxic/Hazardous Substances & Environmental Engine, 46, no. 1 (2011):70-79,
https://doi.org/10.1080/10934529.2011.526905 . .

TY  - JOUR
AU  - Marinović, Vedrana M.
AU  - Marinović, Sanja
AU  - Jovanović, M.
AU  - Jovanovic, J.
AU  - Štrbac, Svetlana
PY  - 2010
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5619
AB  - The electrochemical reduction of 2,4,6-trinitrotoluene (TNT) was investigated by cyclic voltammetry on a platinum electrode in aqueous sodium chloride solutions with acetonitrile containing different concentrations of TNT. The obtained cyclic voltammograms showed three distinct reduction peaks in the potential range of -0.45 to -0.8 V (vs. an Ag/AgCl (3M KCl) reference electrode), which refer to the multi-step process of TNT reduction. The calibration curves of the dependence of the first peak current on the TNT concentration were linear in the ranges 4.4-638.4 mu M and 0.11-4.40 mu M for two different scan rates, 200 my s(-1) and 20 mV s(-1), respectively. The detection limit was 0.11 mu M. Acetonitrile chemisorption on Pt surface took place and caused thus modified platinum electrode to exhibit an electrochemically stabile behaviour. Hence, a very high reproducibility over a prolonged time and voltammetric cycling was provided for using a Pt wire that is easy to handle as a suitable material for TNT sensing. Additionally, it was confirmed by testing the acetonitrile modified Pt wire for TNT detection in river water.
PB  - Elsevier
T2  - Journal of Electroanalytical Chemistry
T1  - The electrochemical reduction of trinitrotoluene on a platinum wire modified by chemisorbed acetonitrile
EP  - 7
IS  - 1
SP  - 1
VL  - 648
DO  - 10.1016/j.jelechem.2010.07.008
ER  - 

@article{
author = "Marinović, Vedrana M. and Marinović, Sanja and Jovanović, M. and Jovanovic, J. and Štrbac, Svetlana",
year = "2010",
abstract = "The electrochemical reduction of 2,4,6-trinitrotoluene (TNT) was investigated by cyclic voltammetry on a platinum electrode in aqueous sodium chloride solutions with acetonitrile containing different concentrations of TNT. The obtained cyclic voltammograms showed three distinct reduction peaks in the potential range of -0.45 to -0.8 V (vs. an Ag/AgCl (3M KCl) reference electrode), which refer to the multi-step process of TNT reduction. The calibration curves of the dependence of the first peak current on the TNT concentration were linear in the ranges 4.4-638.4 mu M and 0.11-4.40 mu M for two different scan rates, 200 my s(-1) and 20 mV s(-1), respectively. The detection limit was 0.11 mu M. Acetonitrile chemisorption on Pt surface took place and caused thus modified platinum electrode to exhibit an electrochemically stabile behaviour. Hence, a very high reproducibility over a prolonged time and voltammetric cycling was provided for using a Pt wire that is easy to handle as a suitable material for TNT sensing. Additionally, it was confirmed by testing the acetonitrile modified Pt wire for TNT detection in river water.",
publisher = "Elsevier",
journal = "Journal of Electroanalytical Chemistry",
title = "The electrochemical reduction of trinitrotoluene on a platinum wire modified by chemisorbed acetonitrile",
pages = "7-1",
number = "1",
volume = "648",
doi = "10.1016/j.jelechem.2010.07.008"
}

Marinović, V. M., Marinović, S., Jovanović, M., Jovanovic, J.,& Štrbac, S.. (2010). The electrochemical reduction of trinitrotoluene on a platinum wire modified by chemisorbed acetonitrile. in Journal of Electroanalytical Chemistry
Elsevier., 648(1), 1-7.
https://doi.org/10.1016/j.jelechem.2010.07.008

Marinović VM, Marinović S, Jovanović M, Jovanovic J, Štrbac S. The electrochemical reduction of trinitrotoluene on a platinum wire modified by chemisorbed acetonitrile. in Journal of Electroanalytical Chemistry. 2010;648(1):1-7.
doi:10.1016/j.jelechem.2010.07.008 .

Marinović, Vedrana M., Marinović, Sanja, Jovanović, M., Jovanovic, J., Štrbac, Svetlana, "The electrochemical reduction of trinitrotoluene on a platinum wire modified by chemisorbed acetonitrile" in Journal of Electroanalytical Chemistry, 648, no. 1 (2010):1-7,
https://doi.org/10.1016/j.jelechem.2010.07.008 . .

TY  - JOUR
AU  - Lukić, Ivana
AU  - Krstić, Jugoslav
AU  - Glišić, Sandra
AU  - Jovanović, Dušan
AU  - Skala, Dejan
PY  - 2010
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1600
AB  - In this study, catalysts for fatty acid methyl esters (FAME or biodiesel) synthesis with K2CO3 as the active component on an alumina/silica support were synthesized using the sol-gel method, which was followed by drying the 'dense' wet gels with supercritical carbon dioxide to obtain the aerogels. The prepared catalysts were characterized by XRD analysis, FTIR spectroscopy and N2 physisorption at 77 K, and tested in the methanolysis of sunflower oil. The effects of reaction variables, such as reaction time, temperature and methanol to oil molar ratio, on the yield of FAME were investigated. The aerogel catalysts with K2CO3 as the active component on an alumina/silica support exhibited good activity in the methanolysis of sunflower oil. The leaching of potassium when the catalyst was in contact with pure methanol under the working conditions of methanolysis was also tested in this study, indicating that it occurred only at higher temperatures, while at lower ones, it was negligible.
AB  - U ovom radu katalizator za sintezu metil estara masnih kiselina (MEMK ili biodizel) sa K2CO3 kao aktivnom komponentom na alumosilikatnom nosaču sintetizovan je sol-gel metodom nakon čega je dobijeni gel sušen uz prisustvo natkritičnog ugljen dioksida da bi se dobio aerogel. Za karakterizaciju sintetizovanih katalizatora korišćene su metode XRD, FTIR i N2 fizisorpcija na 77 K i katalizatori su testirani u reakciji metanolize suncokretovog ulja. Katalizator je testiran u reakciji metanolize suncekrotovog ulja i sintezi MEMK. Ispitan je uticaj različitih parametara kao što su vreme, temperatura i molarni odnos metanol : ulje na prinos MEMK. Aerogel katalizator sa K2CO3 kao aktivnom komponentom na alumosilikatnom nosaču pokazao je dobru katalitičku aktivnost u reakciji metanolize suncokretovog ulja. Izluživanje kalijuma u kontaktu sa metanolom na radnim uslovima metanolize takođe je testirano u ovom radu, pokazujući da ono postoji na višim temperaturama, dok je na nižim zanemarljivo.
PB  - Serbian Chemical Society, Belgrade
T2  - Journal of the Serbian Chemical Society
T1  - Biodiesel synthesis using K2CO3/Al-O-Si aerogel catalysts
T1  - Sinteza biodizela katalizovana alumosilikatnim aerogelom sa K2Co3
EP  - 801
IS  - 6
SP  - 789
VL  - 75
UR  - https://hdl.handle.net/21.15107/rcub_technorep_1600
ER  - 

@article{
author = "Lukić, Ivana and Krstić, Jugoslav and Glišić, Sandra and Jovanović, Dušan and Skala, Dejan",
year = "2010",
abstract = "In this study, catalysts for fatty acid methyl esters (FAME or biodiesel) synthesis with K2CO3 as the active component on an alumina/silica support were synthesized using the sol-gel method, which was followed by drying the 'dense' wet gels with supercritical carbon dioxide to obtain the aerogels. The prepared catalysts were characterized by XRD analysis, FTIR spectroscopy and N2 physisorption at 77 K, and tested in the methanolysis of sunflower oil. The effects of reaction variables, such as reaction time, temperature and methanol to oil molar ratio, on the yield of FAME were investigated. The aerogel catalysts with K2CO3 as the active component on an alumina/silica support exhibited good activity in the methanolysis of sunflower oil. The leaching of potassium when the catalyst was in contact with pure methanol under the working conditions of methanolysis was also tested in this study, indicating that it occurred only at higher temperatures, while at lower ones, it was negligible., U ovom radu katalizator za sintezu metil estara masnih kiselina (MEMK ili biodizel) sa K2CO3 kao aktivnom komponentom na alumosilikatnom nosaču sintetizovan je sol-gel metodom nakon čega je dobijeni gel sušen uz prisustvo natkritičnog ugljen dioksida da bi se dobio aerogel. Za karakterizaciju sintetizovanih katalizatora korišćene su metode XRD, FTIR i N2 fizisorpcija na 77 K i katalizatori su testirani u reakciji metanolize suncokretovog ulja. Katalizator je testiran u reakciji metanolize suncekrotovog ulja i sintezi MEMK. Ispitan je uticaj različitih parametara kao što su vreme, temperatura i molarni odnos metanol : ulje na prinos MEMK. Aerogel katalizator sa K2CO3 kao aktivnom komponentom na alumosilikatnom nosaču pokazao je dobru katalitičku aktivnost u reakciji metanolize suncokretovog ulja. Izluživanje kalijuma u kontaktu sa metanolom na radnim uslovima metanolize takođe je testirano u ovom radu, pokazujući da ono postoji na višim temperaturama, dok je na nižim zanemarljivo.",
publisher = "Serbian Chemical Society, Belgrade",
journal = "Journal of the Serbian Chemical Society",
title = "Biodiesel synthesis using K2CO3/Al-O-Si aerogel catalysts, Sinteza biodizela katalizovana alumosilikatnim aerogelom sa K2Co3",
pages = "801-789",
number = "6",
volume = "75",
url = "https://hdl.handle.net/21.15107/rcub_technorep_1600"
}

Lukić, I., Krstić, J., Glišić, S., Jovanović, D.,& Skala, D.. (2010). Biodiesel synthesis using K2CO3/Al-O-Si aerogel catalysts. in Journal of the Serbian Chemical Society
Serbian Chemical Society, Belgrade., 75(6), 789-801.
https://hdl.handle.net/21.15107/rcub_technorep_1600

Lukić I, Krstić J, Glišić S, Jovanović D, Skala D. Biodiesel synthesis using K2CO3/Al-O-Si aerogel catalysts. in Journal of the Serbian Chemical Society. 2010;75(6):789-801.
https://hdl.handle.net/21.15107/rcub_technorep_1600 .

Lukić, Ivana, Krstić, Jugoslav, Glišić, Sandra, Jovanović, Dušan, Skala, Dejan, "Biodiesel synthesis using K2CO3/Al-O-Si aerogel catalysts" in Journal of the Serbian Chemical Society, 75, no. 6 (2010):789-801,
https://hdl.handle.net/21.15107/rcub_technorep_1600 .

TY  - JOUR
AU  - Marinović, Sanja
AU  - Popović, Ivanka
AU  - Dunjić, Branko
AU  - Tasić, S.
AU  - Božić, B.
AU  - Jovanović, Dušan M.
PY  - 2010
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1583
AB  - The aim of this study was to investigate the influence of different components of interpenetrating polymer networks (IPNs) on their behavior in dual curing automotive applications. Dual curing is one of possible ways to obtain fast curing, scratch resistant coatings for use in OEM and car refinish applications. Dual curing systems, upon hardening, represent interpenetrating networks (IPNs) [1]. IPN's were obtained using novel acrylate-terminated hyperbranched polyester with high functionality and compared to classical 2-pack polyurethane clear coat. In our previous manuscript [1] we investigated the influence of the acrylated hyperbranched polyester (HBP(A)) content in dual curing systems. In this article we studied the influence of the reactive diluent on dual curing compositions. To this end, we have chosen IPN with 50/50 weigth ratio of polyurethane (PU) and polyacrylic (PA) component. In order to determine more clearly the role of the HBP(A) in one IPN HBP(A) was changed with hexane diol diacrylate (HDDA), keeping the same ratio with EHA. The IPNs were characterized by dynamic-mechanical analysis (DMA), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The mechanical properties of the IPNs were also investigated. The IPN with HDDA as reactive diluent, had the best performance. IPN with H BP(A) had the highest glass transition temperature Tg and the highest crosslink density, but it did not have the highest hardness.
PB  - Elsevier Science Sa, Lausanne
T2  - Progress in Organic Coatings
T1  - The influence of different components on interpenetrating polymer network's (IPN's) characteristics as automotive top coats
EP  - 298
IS  - 4
SP  - 293
VL  - 68
DO  - 10.1016/j.porgcoat.2010.03.010
ER  - 

@article{
author = "Marinović, Sanja and Popović, Ivanka and Dunjić, Branko and Tasić, S. and Božić, B. and Jovanović, Dušan M.",
year = "2010",
abstract = "The aim of this study was to investigate the influence of different components of interpenetrating polymer networks (IPNs) on their behavior in dual curing automotive applications. Dual curing is one of possible ways to obtain fast curing, scratch resistant coatings for use in OEM and car refinish applications. Dual curing systems, upon hardening, represent interpenetrating networks (IPNs) [1]. IPN's were obtained using novel acrylate-terminated hyperbranched polyester with high functionality and compared to classical 2-pack polyurethane clear coat. In our previous manuscript [1] we investigated the influence of the acrylated hyperbranched polyester (HBP(A)) content in dual curing systems. In this article we studied the influence of the reactive diluent on dual curing compositions. To this end, we have chosen IPN with 50/50 weigth ratio of polyurethane (PU) and polyacrylic (PA) component. In order to determine more clearly the role of the HBP(A) in one IPN HBP(A) was changed with hexane diol diacrylate (HDDA), keeping the same ratio with EHA. The IPNs were characterized by dynamic-mechanical analysis (DMA), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The mechanical properties of the IPNs were also investigated. The IPN with HDDA as reactive diluent, had the best performance. IPN with H BP(A) had the highest glass transition temperature Tg and the highest crosslink density, but it did not have the highest hardness.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Progress in Organic Coatings",
title = "The influence of different components on interpenetrating polymer network's (IPN's) characteristics as automotive top coats",
pages = "298-293",
number = "4",
volume = "68",
doi = "10.1016/j.porgcoat.2010.03.010"
}

Marinović, S., Popović, I., Dunjić, B., Tasić, S., Božić, B.,& Jovanović, D. M.. (2010). The influence of different components on interpenetrating polymer network's (IPN's) characteristics as automotive top coats. in Progress in Organic Coatings
Elsevier Science Sa, Lausanne., 68(4), 293-298.
https://doi.org/10.1016/j.porgcoat.2010.03.010

Marinović S, Popović I, Dunjić B, Tasić S, Božić B, Jovanović DM. The influence of different components on interpenetrating polymer network's (IPN's) characteristics as automotive top coats. in Progress in Organic Coatings. 2010;68(4):293-298.
doi:10.1016/j.porgcoat.2010.03.010 .

Marinović, Sanja, Popović, Ivanka, Dunjić, Branko, Tasić, S., Božić, B., Jovanović, Dušan M., "The influence of different components on interpenetrating polymer network's (IPN's) characteristics as automotive top coats" in Progress in Organic Coatings, 68, no. 4 (2010):293-298,
https://doi.org/10.1016/j.porgcoat.2010.03.010 . .

TY  - JOUR
AU  - Lukić, Ivana
AU  - Krstić, Jugoslav
AU  - Jovanović, D.
AU  - Skala, Dejan
PY  - 2009
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1432
AB  - The new type of catalyst for fatty acid methyl esters (FAME or biodiesel) synthesis with K2CO3 as active component on alumina/silica support was synthesized using sol-gel method. Corresponding catalyst (xerogel) was prepared by 12 h drying the wet gel in air at 300 degrees C, 600 degrees C or 1000 degrees C at atmospheric pressure. The catalysts activity in the methanolysis of sunflower oil was compared to the activity of the pure K2CO3. The effects of various reaction variables on the yield of FAME were investigated. It was found that the temperature of 120 degrees C and methanol to oil molar ratio of 15: 1, are optimal conditions for FAME synthesis with synthesized catalyst. Repeated use of same amount of catalyst indicated that effect of potassium leaching obviously existed leading to decrease of catalyst activity.
PB  - Elsevier Sci Ltd, Oxford
T2  - Bioresource Technology
T1  - Alumina/silica supported K2CO3 as a catalyst for biodiesel synthesis from sunflower oil
EP  - 4696
IS  - 20
SP  - 4690
VL  - 100
DO  - 10.1016/j.biortech.2009.04.057
ER  - 

@article{
author = "Lukić, Ivana and Krstić, Jugoslav and Jovanović, D. and Skala, Dejan",
year = "2009",
abstract = "The new type of catalyst for fatty acid methyl esters (FAME or biodiesel) synthesis with K2CO3 as active component on alumina/silica support was synthesized using sol-gel method. Corresponding catalyst (xerogel) was prepared by 12 h drying the wet gel in air at 300 degrees C, 600 degrees C or 1000 degrees C at atmospheric pressure. The catalysts activity in the methanolysis of sunflower oil was compared to the activity of the pure K2CO3. The effects of various reaction variables on the yield of FAME were investigated. It was found that the temperature of 120 degrees C and methanol to oil molar ratio of 15: 1, are optimal conditions for FAME synthesis with synthesized catalyst. Repeated use of same amount of catalyst indicated that effect of potassium leaching obviously existed leading to decrease of catalyst activity.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Bioresource Technology",
title = "Alumina/silica supported K2CO3 as a catalyst for biodiesel synthesis from sunflower oil",
pages = "4696-4690",
number = "20",
volume = "100",
doi = "10.1016/j.biortech.2009.04.057"
}

Lukić, I., Krstić, J., Jovanović, D.,& Skala, D.. (2009). Alumina/silica supported K2CO3 as a catalyst for biodiesel synthesis from sunflower oil. in Bioresource Technology
Elsevier Sci Ltd, Oxford., 100(20), 4690-4696.
https://doi.org/10.1016/j.biortech.2009.04.057

Lukić I, Krstić J, Jovanović D, Skala D. Alumina/silica supported K2CO3 as a catalyst for biodiesel synthesis from sunflower oil. in Bioresource Technology. 2009;100(20):4690-4696.
doi:10.1016/j.biortech.2009.04.057 .

Lukić, Ivana, Krstić, Jugoslav, Jovanović, D., Skala, Dejan, "Alumina/silica supported K2CO3 as a catalyst for biodiesel synthesis from sunflower oil" in Bioresource Technology, 100, no. 20 (2009):4690-4696,
https://doi.org/10.1016/j.biortech.2009.04.057 . .