TY  - JOUR
AU  - Gak Simić, Kristina
AU  - Đorđević, Ivana S.
AU  - Lazić, Anita M.
AU  - Radovanović, Lidija D.
AU  - Petković-Benazzouz, Marija
AU  - Rogan, Jelena R.
AU  - Trišović, Nemanja
AU  - Janjić, Goran
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4678
AB  - The quantitative assessment of intermolecular interactions and their cooperative effects has been performed in spirohydantoin-based model compounds, 3-benzoyl-1,3-diazaspiro[4.5]decane-2,4-dione (1) and 3-(4-fluorobenzoyl)-1,3-diazaspiro[4.5]decane-2,4-dione (2), through single crystal X-ray crystallography and quantum chemical studies. In both crystal structures, molecules generate the same hydrogen-bonded centrosymmetric R22(8) synthon. The extended supramolecular architectures depend on the C-HO, C-Hπ, stacking interactions and parallel interactions at large offsets, which lead to molecular sheets and further, with the assistance of the C-HF interaction in the case of2, to three-dimensional networks. Electrostatic potential maps have indicated that formation of the intermolecular FF interaction in the crystal structure of2results in a new region with a larger surface area and a higher negative potential in comparison to the individual fluorine atoms. Establishment of this interaction leads to strengthening of the interaction of one of the fluorine atoms with a third molecule from the environment which does not interact with both of them. When this third molecule interacts with both fluorine atoms simultaneously, the calculations have shown that the effect of strengthening of the individual interactions due to formation of the FF interaction is absent.
PB  - Royal Society of Chemistry
T2  - CrystEngComm
T1  - On the supramolecular outcomes of fluorination of cyclohexane-5-spirohydantoin derivatives
VL  - 23
IS  - 13
SP  - 2606
EP  - 2622
DO  - 10.1039/d0ce01841d
ER  - 

@article{
author = "Gak Simić, Kristina and Đorđević, Ivana S. and Lazić, Anita M. and Radovanović, Lidija D. and Petković-Benazzouz, Marija and Rogan, Jelena R. and Trišović, Nemanja and Janjić, Goran",
year = "2021",
abstract = "The quantitative assessment of intermolecular interactions and their cooperative effects has been performed in spirohydantoin-based model compounds, 3-benzoyl-1,3-diazaspiro[4.5]decane-2,4-dione (1) and 3-(4-fluorobenzoyl)-1,3-diazaspiro[4.5]decane-2,4-dione (2), through single crystal X-ray crystallography and quantum chemical studies. In both crystal structures, molecules generate the same hydrogen-bonded centrosymmetric R22(8) synthon. The extended supramolecular architectures depend on the C-HO, C-Hπ, stacking interactions and parallel interactions at large offsets, which lead to molecular sheets and further, with the assistance of the C-HF interaction in the case of2, to three-dimensional networks. Electrostatic potential maps have indicated that formation of the intermolecular FF interaction in the crystal structure of2results in a new region with a larger surface area and a higher negative potential in comparison to the individual fluorine atoms. Establishment of this interaction leads to strengthening of the interaction of one of the fluorine atoms with a third molecule from the environment which does not interact with both of them. When this third molecule interacts with both fluorine atoms simultaneously, the calculations have shown that the effect of strengthening of the individual interactions due to formation of the FF interaction is absent.",
publisher = "Royal Society of Chemistry",
journal = "CrystEngComm",
title = "On the supramolecular outcomes of fluorination of cyclohexane-5-spirohydantoin derivatives",
volume = "23",
number = "13",
pages = "2606-2622",
doi = "10.1039/d0ce01841d"
}

Gak Simić, K., Đorđević, I. S., Lazić, A. M., Radovanović, L. D., Petković-Benazzouz, M., Rogan, J. R., Trišović, N.,& Janjić, G.. (2021). On the supramolecular outcomes of fluorination of cyclohexane-5-spirohydantoin derivatives. in CrystEngComm
Royal Society of Chemistry., 23(13), 2606-2622.
https://doi.org/10.1039/d0ce01841d

Gak Simić K, Đorđević IS, Lazić AM, Radovanović LD, Petković-Benazzouz M, Rogan JR, Trišović N, Janjić G. On the supramolecular outcomes of fluorination of cyclohexane-5-spirohydantoin derivatives. in CrystEngComm. 2021;23(13):2606-2622.
doi:10.1039/d0ce01841d .

Gak Simić, Kristina, Đorđević, Ivana S., Lazić, Anita M., Radovanović, Lidija D., Petković-Benazzouz, Marija, Rogan, Jelena R., Trišović, Nemanja, Janjić, Goran, "On the supramolecular outcomes of fluorination of cyclohexane-5-spirohydantoin derivatives" in CrystEngComm, 23, no. 13 (2021):2606-2622,
https://doi.org/10.1039/d0ce01841d . .

TY  - JOUR
AU  - Đorđević, Ivana S.
AU  - Popadić, Marko
AU  - Sarvan, Mirjana
AU  - Petković - Benazzouz, Marija
AU  - Janjić, Goran
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3474
AB  - Statistical analysis of data from crystal structures extracted from the Cambridge Structural Database (CSD) has shown that S and Se atoms display a similar tendency towards specific types of interaction if they are part of a fragment that corresponds to the side chains of cysteine (Cys), methionine (Met) selenocysteine (Sec) and selenomethionine (Mse). The most numerous are structures with C-H..Se and C-H..S interactions (∼80%), notably less numerous are structures with Se..Se and S..S interactions (∼5%), and Se..π and S..π interactions are the least numerous. The results of quantum-chemical calculations have indicated that C-H..Se (∼-0.8 kcal mol-1) and C-H..S interactions are weaker than the most stable parallel interaction (∼-3.3 kcal mol-1) and electrostatic interactions of σ/π type (∼-2.6 kcal mol-1). Their significant presence can be explained by the abundance of CH groups compared with the numbers of Se and S atoms in the crystal structures, and also by the influence of substituents bonded to the Se or S atom that further reduce their possibilities for interacting with species from the environment. This can also offer an explanation as to why O-H..Se (∼-4.4 kcal mol-1) and N-H..Se interactions (∼-2.2 kcal mol-1) are less numerous. Docking studies revealed that S and Se rarely participate in interactions with the amino acid residues of target enzymes, mostly because those residues preferentially interact with the substituents bonded to Se and S. The differences between Se and S ligands in the number and positions of their binding sites are more pronounced if the substituents are polar and if there are more Se/S atoms in the ligand.
PB  - International Union of Crystallography
T2  - Acta Crystallographica. Section B: Structural Science Crystal Engineering and Materials
T1  - Supramolecular insight into the substitution of sulfur by selenium, based on crystal structures, quantum-chemical calculations and biosystem recognition
VL  - 76
SP  - 122
EP  - 136
DO  - 10.1107/S2052520619016287
ER  - 

@article{
author = "Đorđević, Ivana S. and Popadić, Marko and Sarvan, Mirjana and Petković - Benazzouz, Marija and Janjić, Goran",
year = "2020",
abstract = "Statistical analysis of data from crystal structures extracted from the Cambridge Structural Database (CSD) has shown that S and Se atoms display a similar tendency towards specific types of interaction if they are part of a fragment that corresponds to the side chains of cysteine (Cys), methionine (Met) selenocysteine (Sec) and selenomethionine (Mse). The most numerous are structures with C-H..Se and C-H..S interactions (∼80%), notably less numerous are structures with Se..Se and S..S interactions (∼5%), and Se..π and S..π interactions are the least numerous. The results of quantum-chemical calculations have indicated that C-H..Se (∼-0.8 kcal mol-1) and C-H..S interactions are weaker than the most stable parallel interaction (∼-3.3 kcal mol-1) and electrostatic interactions of σ/π type (∼-2.6 kcal mol-1). Their significant presence can be explained by the abundance of CH groups compared with the numbers of Se and S atoms in the crystal structures, and also by the influence of substituents bonded to the Se or S atom that further reduce their possibilities for interacting with species from the environment. This can also offer an explanation as to why O-H..Se (∼-4.4 kcal mol-1) and N-H..Se interactions (∼-2.2 kcal mol-1) are less numerous. Docking studies revealed that S and Se rarely participate in interactions with the amino acid residues of target enzymes, mostly because those residues preferentially interact with the substituents bonded to Se and S. The differences between Se and S ligands in the number and positions of their binding sites are more pronounced if the substituents are polar and if there are more Se/S atoms in the ligand.",
publisher = "International Union of Crystallography",
journal = "Acta Crystallographica. Section B: Structural Science Crystal Engineering and Materials",
title = "Supramolecular insight into the substitution of sulfur by selenium, based on crystal structures, quantum-chemical calculations and biosystem recognition",
volume = "76",
pages = "122-136",
doi = "10.1107/S2052520619016287"
}

Đorđević, I. S., Popadić, M., Sarvan, M., Petković - Benazzouz, M.,& Janjić, G.. (2020). Supramolecular insight into the substitution of sulfur by selenium, based on crystal structures, quantum-chemical calculations and biosystem recognition. in Acta Crystallographica. Section B: Structural Science Crystal Engineering and Materials
International Union of Crystallography., 76, 122-136.
https://doi.org/10.1107/S2052520619016287

Đorđević IS, Popadić M, Sarvan M, Petković - Benazzouz M, Janjić G. Supramolecular insight into the substitution of sulfur by selenium, based on crystal structures, quantum-chemical calculations and biosystem recognition. in Acta Crystallographica. Section B: Structural Science Crystal Engineering and Materials. 2020;76:122-136.
doi:10.1107/S2052520619016287 .

Đorđević, Ivana S., Popadić, Marko, Sarvan, Mirjana, Petković - Benazzouz, Marija, Janjić, Goran, "Supramolecular insight into the substitution of sulfur by selenium, based on crystal structures, quantum-chemical calculations and biosystem recognition" in Acta Crystallographica. Section B: Structural Science Crystal Engineering and Materials, 76 (2020):122-136,
https://doi.org/10.1107/S2052520619016287 . .

TY  - JOUR
AU  - Stojadinović, Stevan
AU  - Tadić, Nenad
AU  - Radić, Nenad
AU  - Grbić, Boško
AU  - Vasilić, Rastko
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2292
AB  - Tb doped TiO2 coatings are formed by plasma electrolytic oxidation (PEO) of titanium in water solution of 10 g/L Na3PO4.12H(2)O with addition of Tb4O7 powder. Surface morphology, chemical, and phase composition of obtained PEO coatings are investigated utilizing scanning electron microscopy equipped with energy dispersive x-ray spectroscopy and X-ray diffraction. Uniformly distributed Ti, O, P, and Tb are identified as the main constituents of the coatings. Diffraction patterns of obtained coatings show well pronounced reflections inherent to anatase phase of TiO2. Performed photoluminescence measurements indicate that incorporated Tb is in trivalent oxidation state. Photoluminescence emission spectra feature two overlapping regions: the first region is related to band of TiO2 host and the second region which features several emission bands is ascribed to f-f transitions of Tb3+ from excited level D-5(4) to lower levels F-7(J) (J = 3,4,5, and 6). The photocatalytic activity (PA) of Tb3+ doped TiO2 coatings is probed by measuring the photodegradation of methyl orange under simulated sunlight conditions, suggesting that the main factor affecting PA is concentration of Tb3+ ions incorporated into coatings. Tb3+ doped TiO2 coatings formed for short time have better PA than pure TiO2 coatings formed under the same conditions; the highest PA is observed for the coating formed after 1 min of PEO process. Presence of Tb3+ ions into TiO2 coatings in small concentration improves PA through effective suppression of electron/hole recombination.
PB  - Elsevier
T2  - Surface and Coatings Technology
T1  - Effect of Tb3+ doping on the photocatalytic activity of TiO2 coatings formed by plasma electrolytic oxidation of titanium
VL  - 337
SP  - 279
EP  - 289
DO  - 10.1016/j.surfcoat.2018.01.033
ER  - 

@article{
author = "Stojadinović, Stevan and Tadić, Nenad and Radić, Nenad and Grbić, Boško and Vasilić, Rastko",
year = "2018",
abstract = "Tb doped TiO2 coatings are formed by plasma electrolytic oxidation (PEO) of titanium in water solution of 10 g/L Na3PO4.12H(2)O with addition of Tb4O7 powder. Surface morphology, chemical, and phase composition of obtained PEO coatings are investigated utilizing scanning electron microscopy equipped with energy dispersive x-ray spectroscopy and X-ray diffraction. Uniformly distributed Ti, O, P, and Tb are identified as the main constituents of the coatings. Diffraction patterns of obtained coatings show well pronounced reflections inherent to anatase phase of TiO2. Performed photoluminescence measurements indicate that incorporated Tb is in trivalent oxidation state. Photoluminescence emission spectra feature two overlapping regions: the first region is related to band of TiO2 host and the second region which features several emission bands is ascribed to f-f transitions of Tb3+ from excited level D-5(4) to lower levels F-7(J) (J = 3,4,5, and 6). The photocatalytic activity (PA) of Tb3+ doped TiO2 coatings is probed by measuring the photodegradation of methyl orange under simulated sunlight conditions, suggesting that the main factor affecting PA is concentration of Tb3+ ions incorporated into coatings. Tb3+ doped TiO2 coatings formed for short time have better PA than pure TiO2 coatings formed under the same conditions; the highest PA is observed for the coating formed after 1 min of PEO process. Presence of Tb3+ ions into TiO2 coatings in small concentration improves PA through effective suppression of electron/hole recombination.",
publisher = "Elsevier",
journal = "Surface and Coatings Technology",
title = "Effect of Tb3+ doping on the photocatalytic activity of TiO2 coatings formed by plasma electrolytic oxidation of titanium",
volume = "337",
pages = "279-289",
doi = "10.1016/j.surfcoat.2018.01.033"
}

Stojadinović, S., Tadić, N., Radić, N., Grbić, B.,& Vasilić, R.. (2018). Effect of Tb3+ doping on the photocatalytic activity of TiO2 coatings formed by plasma electrolytic oxidation of titanium. in Surface and Coatings Technology
Elsevier., 337, 279-289.
https://doi.org/10.1016/j.surfcoat.2018.01.033

Stojadinović S, Tadić N, Radić N, Grbić B, Vasilić R. Effect of Tb3+ doping on the photocatalytic activity of TiO2 coatings formed by plasma electrolytic oxidation of titanium. in Surface and Coatings Technology. 2018;337:279-289.
doi:10.1016/j.surfcoat.2018.01.033 .

Stojadinović, Stevan, Tadić, Nenad, Radić, Nenad, Grbić, Boško, Vasilić, Rastko, "Effect of Tb3+ doping on the photocatalytic activity of TiO2 coatings formed by plasma electrolytic oxidation of titanium" in Surface and Coatings Technology, 337 (2018):279-289,
https://doi.org/10.1016/j.surfcoat.2018.01.033 . .

TY  - JOUR
AU  - Stojadinović, Stevan
AU  - Radić, Nenad
AU  - Tadić, Nenad
AU  - Vasilić, Rastko
AU  - Stefanov, Plamen
AU  - Grbić, Boško
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2307
AB  - This paper presents the results of our recent investigation focused on the preparation and possible photocatalytic application of iron doped TiO2 coatings formed by plasma electrolytic oxidation of high purity titanium in electrolyte containing FeSO4. The morphology, phase and elemental composition, and absorption band of the coatings were characterized by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and diffuse reflectance spectroscopy. The photocatalytic activity of coatings was evaluated by measuring the degradation of methyl orange under simulated sunlight conditions. It was found that the addition of iron precursor to electrolyte solution improves the photocatalytic properties of obtained coatings with respect to pure TiO2 coating. The incorporation of iron in TiO2 lattice was identified as the main factor affecting the increase of photocatalytic activity. The highest photocatalytic activity was observed when coatings were processed for 2 min with addition of 1 g/L FeSO4 to electrolyte.
PB  - Springer, Dordrecht
T2  - Journal of Materials Science-Materials in Electronics
T1  - Influence of iron doping on photocatalytic activity of TiO2 coatings formed on titanium by plasma electrolytic oxidation
VL  - 29
IS  - 11
SP  - 9427
EP  - 9434
DO  - 10.1007/s10854-018-8975-6
ER  - 

@article{
author = "Stojadinović, Stevan and Radić, Nenad and Tadić, Nenad and Vasilić, Rastko and Stefanov, Plamen and Grbić, Boško",
year = "2018",
abstract = "This paper presents the results of our recent investigation focused on the preparation and possible photocatalytic application of iron doped TiO2 coatings formed by plasma electrolytic oxidation of high purity titanium in electrolyte containing FeSO4. The morphology, phase and elemental composition, and absorption band of the coatings were characterized by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and diffuse reflectance spectroscopy. The photocatalytic activity of coatings was evaluated by measuring the degradation of methyl orange under simulated sunlight conditions. It was found that the addition of iron precursor to electrolyte solution improves the photocatalytic properties of obtained coatings with respect to pure TiO2 coating. The incorporation of iron in TiO2 lattice was identified as the main factor affecting the increase of photocatalytic activity. The highest photocatalytic activity was observed when coatings were processed for 2 min with addition of 1 g/L FeSO4 to electrolyte.",
publisher = "Springer, Dordrecht",
journal = "Journal of Materials Science-Materials in Electronics",
title = "Influence of iron doping on photocatalytic activity of TiO2 coatings formed on titanium by plasma electrolytic oxidation",
volume = "29",
number = "11",
pages = "9427-9434",
doi = "10.1007/s10854-018-8975-6"
}

Stojadinović, S., Radić, N., Tadić, N., Vasilić, R., Stefanov, P.,& Grbić, B.. (2018). Influence of iron doping on photocatalytic activity of TiO2 coatings formed on titanium by plasma electrolytic oxidation. in Journal of Materials Science-Materials in Electronics
Springer, Dordrecht., 29(11), 9427-9434.
https://doi.org/10.1007/s10854-018-8975-6

Stojadinović S, Radić N, Tadić N, Vasilić R, Stefanov P, Grbić B. Influence of iron doping on photocatalytic activity of TiO2 coatings formed on titanium by plasma electrolytic oxidation. in Journal of Materials Science-Materials in Electronics. 2018;29(11):9427-9434.
doi:10.1007/s10854-018-8975-6 .

Stojadinović, Stevan, Radić, Nenad, Tadić, Nenad, Vasilić, Rastko, Stefanov, Plamen, Grbić, Boško, "Influence of iron doping on photocatalytic activity of TiO2 coatings formed on titanium by plasma electrolytic oxidation" in Journal of Materials Science-Materials in Electronics, 29, no. 11 (2018):9427-9434,
https://doi.org/10.1007/s10854-018-8975-6 . .

TY  - JOUR
AU  - Stojadinović, Stevan
AU  - Tadić, Nenad
AU  - Radić, Nenad
AU  - Grbić, Boško
AU  - Vasilić, Rastko
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2445
AB  - CdS particles modified anatase TiO2 photocatalysts were formed on titanium substrate by plasma electrolytic oxidation for 2 min in supporting electrolyte (10 g/L Na-3 center dot PO4 center dot 12H(2)O) with addition of CdS particles in concentrations up to 8 g/L. Content of CdS particles incorporated into TiO2 coatings depends of CdS particles concentration in supporting electrolyte, while surface morphology, phase structure and absorption properties of formed coatings were not significantly influenced by the addition of CdS particles. In contrast to pure TiO2 coatings, TiO2/CdS coatings exhibit enhanced photocatalytic activity (PA) in the degradation of methyl orange, used as a model organic pollutant, under simulated solar irradiation. The highest PA was observed for TiO2/CdS coating formed in supporting electrolyte with addition of 0.4 g/L of CdS particles. Photoluminescence measurements indicate that enhanced PA is related to the reduction of the recombination rate of photogenerated electron/hole pairs as a result of TiO2 and CdS coupling.
PB  - Elsevier
T2  - Surface and Coatings Technology
T1  - CdS particles modified TiO2 coatings formed by plasma electrolytic oxidation with enhanced photocatalytic activity
VL  - 344
SP  - 528
EP  - 533
DO  - 10.1016/j.surfcoat.2018.03.080
ER  - 

@article{
author = "Stojadinović, Stevan and Tadić, Nenad and Radić, Nenad and Grbić, Boško and Vasilić, Rastko",
year = "2018",
abstract = "CdS particles modified anatase TiO2 photocatalysts were formed on titanium substrate by plasma electrolytic oxidation for 2 min in supporting electrolyte (10 g/L Na-3 center dot PO4 center dot 12H(2)O) with addition of CdS particles in concentrations up to 8 g/L. Content of CdS particles incorporated into TiO2 coatings depends of CdS particles concentration in supporting electrolyte, while surface morphology, phase structure and absorption properties of formed coatings were not significantly influenced by the addition of CdS particles. In contrast to pure TiO2 coatings, TiO2/CdS coatings exhibit enhanced photocatalytic activity (PA) in the degradation of methyl orange, used as a model organic pollutant, under simulated solar irradiation. The highest PA was observed for TiO2/CdS coating formed in supporting electrolyte with addition of 0.4 g/L of CdS particles. Photoluminescence measurements indicate that enhanced PA is related to the reduction of the recombination rate of photogenerated electron/hole pairs as a result of TiO2 and CdS coupling.",
publisher = "Elsevier",
journal = "Surface and Coatings Technology",
title = "CdS particles modified TiO2 coatings formed by plasma electrolytic oxidation with enhanced photocatalytic activity",
volume = "344",
pages = "528-533",
doi = "10.1016/j.surfcoat.2018.03.080"
}

Stojadinović, S., Tadić, N., Radić, N., Grbić, B.,& Vasilić, R.. (2018). CdS particles modified TiO2 coatings formed by plasma electrolytic oxidation with enhanced photocatalytic activity. in Surface and Coatings Technology
Elsevier., 344, 528-533.
https://doi.org/10.1016/j.surfcoat.2018.03.080

Stojadinović S, Tadić N, Radić N, Grbić B, Vasilić R. CdS particles modified TiO2 coatings formed by plasma electrolytic oxidation with enhanced photocatalytic activity. in Surface and Coatings Technology. 2018;344:528-533.
doi:10.1016/j.surfcoat.2018.03.080 .

Stojadinović, Stevan, Tadić, Nenad, Radić, Nenad, Grbić, Boško, Vasilić, Rastko, "CdS particles modified TiO2 coatings formed by plasma electrolytic oxidation with enhanced photocatalytic activity" in Surface and Coatings Technology, 344 (2018):528-533,
https://doi.org/10.1016/j.surfcoat.2018.03.080 . .

TY  - JOUR
AU  - Stojadinović, Stevan
AU  - Tadić, Nenad
AU  - Radić, Nenad
AU  - Grbić, Boško
AU  - Vasilić, Rastko
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4292
AB  - CdS particles modified anatase TiO2 photocatalysts were formed on titanium substrate by plasma electrolytic oxidation for 2 min in supporting electrolyte (10 g/L Na-3 center dot PO4 center dot 12H(2)O) with addition of CdS particles in concentrations up to 8 g/L. Content of CdS particles incorporated into TiO2 coatings depends of CdS particles concentration in supporting electrolyte, while surface morphology, phase structure and absorption properties of formed coatings were not significantly influenced by the addition of CdS particles. In contrast to pure TiO2 coatings, TiO2/CdS coatings exhibit enhanced photocatalytic activity (PA) in the degradation of methyl orange, used as a model organic pollutant, under simulated solar irradiation. The highest PA was observed for TiO2/CdS coating formed in supporting electrolyte with addition of 0.4 g/L of CdS particles. Photoluminescence measurements indicate that enhanced PA is related to the reduction of the recombination rate of photogenerated electron/hole pairs as a result of TiO2 and CdS coupling.
PB  - Elsevier
T2  - Surface and Coatings Technology
T1  - CdS particles modified TiO2 coatings formed by plasma electrolytic oxidation with enhanced photocatalytic activity
VL  - 344
SP  - 528
EP  - 533
DO  - 10.1016/j.surfcoat.2018.03.080
ER  - 

@article{
author = "Stojadinović, Stevan and Tadić, Nenad and Radić, Nenad and Grbić, Boško and Vasilić, Rastko",
year = "2018",
abstract = "CdS particles modified anatase TiO2 photocatalysts were formed on titanium substrate by plasma electrolytic oxidation for 2 min in supporting electrolyte (10 g/L Na-3 center dot PO4 center dot 12H(2)O) with addition of CdS particles in concentrations up to 8 g/L. Content of CdS particles incorporated into TiO2 coatings depends of CdS particles concentration in supporting electrolyte, while surface morphology, phase structure and absorption properties of formed coatings were not significantly influenced by the addition of CdS particles. In contrast to pure TiO2 coatings, TiO2/CdS coatings exhibit enhanced photocatalytic activity (PA) in the degradation of methyl orange, used as a model organic pollutant, under simulated solar irradiation. The highest PA was observed for TiO2/CdS coating formed in supporting electrolyte with addition of 0.4 g/L of CdS particles. Photoluminescence measurements indicate that enhanced PA is related to the reduction of the recombination rate of photogenerated electron/hole pairs as a result of TiO2 and CdS coupling.",
publisher = "Elsevier",
journal = "Surface and Coatings Technology",
title = "CdS particles modified TiO2 coatings formed by plasma electrolytic oxidation with enhanced photocatalytic activity",
volume = "344",
pages = "528-533",
doi = "10.1016/j.surfcoat.2018.03.080"
}

Stojadinović, S., Tadić, N., Radić, N., Grbić, B.,& Vasilić, R.. (2018). CdS particles modified TiO2 coatings formed by plasma electrolytic oxidation with enhanced photocatalytic activity. in Surface and Coatings Technology
Elsevier., 344, 528-533.
https://doi.org/10.1016/j.surfcoat.2018.03.080

Stojadinović S, Tadić N, Radić N, Grbić B, Vasilić R. CdS particles modified TiO2 coatings formed by plasma electrolytic oxidation with enhanced photocatalytic activity. in Surface and Coatings Technology. 2018;344:528-533.
doi:10.1016/j.surfcoat.2018.03.080 .

Stojadinović, Stevan, Tadić, Nenad, Radić, Nenad, Grbić, Boško, Vasilić, Rastko, "CdS particles modified TiO2 coatings formed by plasma electrolytic oxidation with enhanced photocatalytic activity" in Surface and Coatings Technology, 344 (2018):528-533,
https://doi.org/10.1016/j.surfcoat.2018.03.080 . .

TY  - JOUR
AU  - Stojadinović, Stevan
AU  - Tadić, Nenad
AU  - Radić, Nenad
AU  - Grbić, Boško
AU  - Vasilić, Rastko
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2178
AB  - TiO2/SnO2 coatings are formed by plasma electrolytic oxidation of titanium substrate in supporting electrolyte (10 g/L Na3PO4 center dot 12H(2)O) with addition of various concentrations of SnO2 particles. Photocatalytic activity (PA) of TiO2/SnO2 coatings was evaluated by measuring the degradation of methyl orange under simulated sunlight conditions. It was observed that PA of TiO2/SnO2 coatings strongly depends on the concentration of SnO2 particles in the electrolyte, i. e., the highest PA was observed with addition of 0.3 g/L of SnO2 particles to supporting electrolyte.
PB  - Elsevier
T2  - Materials Letters
T1  - TiO2/SnO2 photocatalyst formed by plasma electrolytic oxidation
VL  - 196
SP  - 292
EP  - 295
DO  - 10.1016/j.matlet.2017.03.115
ER  - 

@article{
author = "Stojadinović, Stevan and Tadić, Nenad and Radić, Nenad and Grbić, Boško and Vasilić, Rastko",
year = "2017",
abstract = "TiO2/SnO2 coatings are formed by plasma electrolytic oxidation of titanium substrate in supporting electrolyte (10 g/L Na3PO4 center dot 12H(2)O) with addition of various concentrations of SnO2 particles. Photocatalytic activity (PA) of TiO2/SnO2 coatings was evaluated by measuring the degradation of methyl orange under simulated sunlight conditions. It was observed that PA of TiO2/SnO2 coatings strongly depends on the concentration of SnO2 particles in the electrolyte, i. e., the highest PA was observed with addition of 0.3 g/L of SnO2 particles to supporting electrolyte.",
publisher = "Elsevier",
journal = "Materials Letters",
title = "TiO2/SnO2 photocatalyst formed by plasma electrolytic oxidation",
volume = "196",
pages = "292-295",
doi = "10.1016/j.matlet.2017.03.115"
}

Stojadinović, S., Tadić, N., Radić, N., Grbić, B.,& Vasilić, R.. (2017). TiO2/SnO2 photocatalyst formed by plasma electrolytic oxidation. in Materials Letters
Elsevier., 196, 292-295.
https://doi.org/10.1016/j.matlet.2017.03.115

Stojadinović S, Tadić N, Radić N, Grbić B, Vasilić R. TiO2/SnO2 photocatalyst formed by plasma electrolytic oxidation. in Materials Letters. 2017;196:292-295.
doi:10.1016/j.matlet.2017.03.115 .

Stojadinović, Stevan, Tadić, Nenad, Radić, Nenad, Grbić, Boško, Vasilić, Rastko, "TiO2/SnO2 photocatalyst formed by plasma electrolytic oxidation" in Materials Letters, 196 (2017):292-295,
https://doi.org/10.1016/j.matlet.2017.03.115 . .

TY  - JOUR
AU  - Stojadinović, Stevan
AU  - Tadić, Nenad
AU  - Radić, Nenad
AU  - Grbić, Boško
AU  - Vasilić, Rastko
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2198
AB  - This paper presents the results of our recent investigation of MgO/ZnO coatings formed on AZ31 magnesium alloy by plasma electrolytic oxidation in phosphate-based alkaline electrolyte with varying concentration of ZnO particles. Surface morphology of obtained coatings is not significantly influenced by the addition of ZnO particles to the supporting electrolyte, while processing time has considerable influence on the morphology of formed coatings. Elemental mapping showed that elements are distributed rather uniformly across the obtained oxide coatings. The content of Zn increases with ZnO particle concentration in the supporting electrolyte as well as with PEO processing time. Incorporation of ZnO particles in obtained coatings was confirmed by X-ray diffraction and Raman spectroscopy. Photoluminescent emission spectra of MgO/ZnO coatings featured sharp band centered at about 380 nm and broad band centered at about 535 nm, with the leading contribution coming from ZnO deposited on the surface. Diffuse reflectance spectra revealed that absorption edge of MgO/ZnO coatings is positioned at about 385 nm. Photoactivity of obtained coatings increases with processing time and ZnO concentration up to 6 g/L.
PB  - Elsevier
T2  - Surface and Coatings Technology
T1  - MgO/ZnO coatings formed on magnesium alloy AZ31 by plasma electrolytic oxidation: Structural, photoluminescence and photocatalytic investigation
VL  - 310
SP  - 98
EP  - 105
DO  - 10.1016/j.surfcoat.2016.12.073
ER  - 

@article{
author = "Stojadinović, Stevan and Tadić, Nenad and Radić, Nenad and Grbić, Boško and Vasilić, Rastko",
year = "2017",
abstract = "This paper presents the results of our recent investigation of MgO/ZnO coatings formed on AZ31 magnesium alloy by plasma electrolytic oxidation in phosphate-based alkaline electrolyte with varying concentration of ZnO particles. Surface morphology of obtained coatings is not significantly influenced by the addition of ZnO particles to the supporting electrolyte, while processing time has considerable influence on the morphology of formed coatings. Elemental mapping showed that elements are distributed rather uniformly across the obtained oxide coatings. The content of Zn increases with ZnO particle concentration in the supporting electrolyte as well as with PEO processing time. Incorporation of ZnO particles in obtained coatings was confirmed by X-ray diffraction and Raman spectroscopy. Photoluminescent emission spectra of MgO/ZnO coatings featured sharp band centered at about 380 nm and broad band centered at about 535 nm, with the leading contribution coming from ZnO deposited on the surface. Diffuse reflectance spectra revealed that absorption edge of MgO/ZnO coatings is positioned at about 385 nm. Photoactivity of obtained coatings increases with processing time and ZnO concentration up to 6 g/L.",
publisher = "Elsevier",
journal = "Surface and Coatings Technology",
title = "MgO/ZnO coatings formed on magnesium alloy AZ31 by plasma electrolytic oxidation: Structural, photoluminescence and photocatalytic investigation",
volume = "310",
pages = "98-105",
doi = "10.1016/j.surfcoat.2016.12.073"
}

Stojadinović, S., Tadić, N., Radić, N., Grbić, B.,& Vasilić, R.. (2017). MgO/ZnO coatings formed on magnesium alloy AZ31 by plasma electrolytic oxidation: Structural, photoluminescence and photocatalytic investigation. in Surface and Coatings Technology
Elsevier., 310, 98-105.
https://doi.org/10.1016/j.surfcoat.2016.12.073

Stojadinović S, Tadić N, Radić N, Grbić B, Vasilić R. MgO/ZnO coatings formed on magnesium alloy AZ31 by plasma electrolytic oxidation: Structural, photoluminescence and photocatalytic investigation. in Surface and Coatings Technology. 2017;310:98-105.
doi:10.1016/j.surfcoat.2016.12.073 .

Stojadinović, Stevan, Tadić, Nenad, Radić, Nenad, Grbić, Boško, Vasilić, Rastko, "MgO/ZnO coatings formed on magnesium alloy AZ31 by plasma electrolytic oxidation: Structural, photoluminescence and photocatalytic investigation" in Surface and Coatings Technology, 310 (2017):98-105,
https://doi.org/10.1016/j.surfcoat.2016.12.073 . .

TY  - JOUR
AU  - Radić, Nenad
AU  - Grbić, Boško
AU  - Stojadinović, Stevan
AU  - Vasilić, Rastko
AU  - Petrović, Srđan
AU  - Rožić, Ljiljana
AU  - Stefanov, Plamen
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2259
AB  - Pt-Ba-Al2O3 coatings were obtained by spray pyrolysis deposition on stainless steel foil. The XRD results showed that the coatings consisted from Ba carbonate and Pt (fcc) phases. SEM micrographs demonstrated that the coatings are smooth and compact. The XPS data confirmed that Ba and Pt are in close contact. Pt crystallite size is only slightly influenced by the order of Pt and Ba deposition and the dispersion of Pt is in the narrow range from 28 to 33% for all samples. Catalyst component deposition order affects NOx storage capacity. Simultaneous deposition of Ba and Pt on already formed Al2O3 substrate produces the most efficient catalyst. Pt deposited on top of the Ba layer results in slightly reduced NOx storage capacity, while deposition of Pt on the separated layer with Ba layer on top significantly reduces the ability for NOx storage.
PB  - Elsevier Science Sa, Lausanne
T2  - Thin Solid Films
T1  - Preparation and characterization of Pt-Ba-Al2O3 coatings obtained by spray pyrolysis
VL  - 628
SP  - 7
EP  - 12
DO  - 10.1016/j.tsf.2017.03.007
ER  - 

@article{
author = "Radić, Nenad and Grbić, Boško and Stojadinović, Stevan and Vasilić, Rastko and Petrović, Srđan and Rožić, Ljiljana and Stefanov, Plamen",
year = "2017",
abstract = "Pt-Ba-Al2O3 coatings were obtained by spray pyrolysis deposition on stainless steel foil. The XRD results showed that the coatings consisted from Ba carbonate and Pt (fcc) phases. SEM micrographs demonstrated that the coatings are smooth and compact. The XPS data confirmed that Ba and Pt are in close contact. Pt crystallite size is only slightly influenced by the order of Pt and Ba deposition and the dispersion of Pt is in the narrow range from 28 to 33% for all samples. Catalyst component deposition order affects NOx storage capacity. Simultaneous deposition of Ba and Pt on already formed Al2O3 substrate produces the most efficient catalyst. Pt deposited on top of the Ba layer results in slightly reduced NOx storage capacity, while deposition of Pt on the separated layer with Ba layer on top significantly reduces the ability for NOx storage.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Thin Solid Films",
title = "Preparation and characterization of Pt-Ba-Al2O3 coatings obtained by spray pyrolysis",
volume = "628",
pages = "7-12",
doi = "10.1016/j.tsf.2017.03.007"
}

Radić, N., Grbić, B., Stojadinović, S., Vasilić, R., Petrović, S., Rožić, L.,& Stefanov, P.. (2017). Preparation and characterization of Pt-Ba-Al2O3 coatings obtained by spray pyrolysis. in Thin Solid Films
Elsevier Science Sa, Lausanne., 628, 7-12.
https://doi.org/10.1016/j.tsf.2017.03.007

Radić N, Grbić B, Stojadinović S, Vasilić R, Petrović S, Rožić L, Stefanov P. Preparation and characterization of Pt-Ba-Al2O3 coatings obtained by spray pyrolysis. in Thin Solid Films. 2017;628:7-12.
doi:10.1016/j.tsf.2017.03.007 .

Radić, Nenad, Grbić, Boško, Stojadinović, Stevan, Vasilić, Rastko, Petrović, Srđan, Rožić, Ljiljana, Stefanov, Plamen, "Preparation and characterization of Pt-Ba-Al2O3 coatings obtained by spray pyrolysis" in Thin Solid Films, 628 (2017):7-12,
https://doi.org/10.1016/j.tsf.2017.03.007 . .

TY  - JOUR
AU  - Tadić, Nenad
AU  - Stojadinović, Stevan
AU  - Radić, Nenad
AU  - Grbić, Boško
AU  - Vasilić, Rastko
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1914
AB  - This paper presents a recent investigation of rapid deposition of TiO2 nanoparticles on aluminum by plasma electrolytic oxidation in Na2SiO3 center dot 5H(2)O water based electrolyte with addition of TiO2 nanoparticles and Na2WO4 center dot 2H(2)O. Oxide coatings were characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy and grazing incidence X-ray diffraction. It was found that surface morphology, chemical and phase compositions of obtained coatings depend on electrolyte composition and processing time. The photocatalytic activity was tested by photodegrading methyl orange under simulated sunlight conditions. It was observed that photodegradation of methyl orange strongly depends on the concentration of TiO2 nanoparticles and sodium tungstate in the electrolyte and PEO treatment time. Coatings with the highest photoactivity were obtained in 4 g/L Na2SiO3 center dot 5H(2)O + 2 g/L Degussa P25 + 0.1 g/L Na2WO4 center dot 2H(2)O.
PB  - Elsevier
T2  - Surface and Coatings Technology
T1  - Characterization and photocatalytic properties of tungsten doped TiO2 coatings on aluminum obtained by plasma electrolytic oxidation
VL  - 305
SP  - 192
EP  - 199
DO  - 10.1016/j.surfcoat.2016.08.045
ER  - 

@article{
author = "Tadić, Nenad and Stojadinović, Stevan and Radić, Nenad and Grbić, Boško and Vasilić, Rastko",
year = "2016",
abstract = "This paper presents a recent investigation of rapid deposition of TiO2 nanoparticles on aluminum by plasma electrolytic oxidation in Na2SiO3 center dot 5H(2)O water based electrolyte with addition of TiO2 nanoparticles and Na2WO4 center dot 2H(2)O. Oxide coatings were characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy and grazing incidence X-ray diffraction. It was found that surface morphology, chemical and phase compositions of obtained coatings depend on electrolyte composition and processing time. The photocatalytic activity was tested by photodegrading methyl orange under simulated sunlight conditions. It was observed that photodegradation of methyl orange strongly depends on the concentration of TiO2 nanoparticles and sodium tungstate in the electrolyte and PEO treatment time. Coatings with the highest photoactivity were obtained in 4 g/L Na2SiO3 center dot 5H(2)O + 2 g/L Degussa P25 + 0.1 g/L Na2WO4 center dot 2H(2)O.",
publisher = "Elsevier",
journal = "Surface and Coatings Technology",
title = "Characterization and photocatalytic properties of tungsten doped TiO2 coatings on aluminum obtained by plasma electrolytic oxidation",
volume = "305",
pages = "192-199",
doi = "10.1016/j.surfcoat.2016.08.045"
}

Tadić, N., Stojadinović, S., Radić, N., Grbić, B.,& Vasilić, R.. (2016). Characterization and photocatalytic properties of tungsten doped TiO2 coatings on aluminum obtained by plasma electrolytic oxidation. in Surface and Coatings Technology
Elsevier., 305, 192-199.
https://doi.org/10.1016/j.surfcoat.2016.08.045

Tadić N, Stojadinović S, Radić N, Grbić B, Vasilić R. Characterization and photocatalytic properties of tungsten doped TiO2 coatings on aluminum obtained by plasma electrolytic oxidation. in Surface and Coatings Technology. 2016;305:192-199.
doi:10.1016/j.surfcoat.2016.08.045 .

Tadić, Nenad, Stojadinović, Stevan, Radić, Nenad, Grbić, Boško, Vasilić, Rastko, "Characterization and photocatalytic properties of tungsten doped TiO2 coatings on aluminum obtained by plasma electrolytic oxidation" in Surface and Coatings Technology, 305 (2016):192-199,
https://doi.org/10.1016/j.surfcoat.2016.08.045 . .

TY  - JOUR
AU  - Stojadinović, Stevan
AU  - Vasilić, Rastko
AU  - Radić, Nenad
AU  - Tadić, Nenad
AU  - Stefanov, Plamen
AU  - Grbić, Boško
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1939
AB  - Tungsten doped Al2O3 /ZnO coatings are formed by plasma electrolytic oxidation of aluminum substrate in supporting electrolyte (0.1 M boric acid + 0.05 M borax + 2 g/L ZnO) with addition of different concentrations of Na2WO4 center dot 2H(2)O. The morphology, crystal structure, chemical composition, and light absorption characteristics of formed surface coatings are investigated. The X-ray diffraction and X-ray photoelectron spectroscopy results indicate that formed surface coatings consist of alpha and gamma phase of A(2)O(3), ZnO, metallic tungsten and WO3. Obtained results showed that incorporated tungsten does not have any influence on the absorption spectra of Al2O3/ZnO coatings, which showed invariable band edge at about 385 nm. The photocatalytic activity of undoped and tungsten doped Al2O3 /ZnO coatings is estimated by the photodegradation of methyl orange. The photocatalytic activity of tungsten doped A(2)O(3)/ZnO coatings is higher thanof undoped Al2O3 /ZnO coatings; the best photocatalytic activity is ascribed to coatings formed in supporting electrolyte with addition of 0.3 g/L Na2WO4 center dot 2H(2)O. Tungsten in A(2)O(3)/ZnO coatings acts as a charge trap, thus reducing the recombination rate of photogenerated electron-hole pairs. The results of PL measurements are in agreement with photocatalytic activity. Declining PL intensity corresponds to increasing photocatalytic activity of the coatings, indicating slower recombination of electron-hole pairs.
PB  - Elsevier
T2  - Applied Surface Science
T1  - The formation of tungsten doped Al2O3/ZnO coatings on aluminum by plasma electrolytic oxidation and their application in photocatalysis
VL  - 377
SP  - 37
EP  - 43
DO  - 10.1016/j.apsusc.2016.03.104
ER  - 

@article{
author = "Stojadinović, Stevan and Vasilić, Rastko and Radić, Nenad and Tadić, Nenad and Stefanov, Plamen and Grbić, Boško",
year = "2016",
abstract = "Tungsten doped Al2O3 /ZnO coatings are formed by plasma electrolytic oxidation of aluminum substrate in supporting electrolyte (0.1 M boric acid + 0.05 M borax + 2 g/L ZnO) with addition of different concentrations of Na2WO4 center dot 2H(2)O. The morphology, crystal structure, chemical composition, and light absorption characteristics of formed surface coatings are investigated. The X-ray diffraction and X-ray photoelectron spectroscopy results indicate that formed surface coatings consist of alpha and gamma phase of A(2)O(3), ZnO, metallic tungsten and WO3. Obtained results showed that incorporated tungsten does not have any influence on the absorption spectra of Al2O3/ZnO coatings, which showed invariable band edge at about 385 nm. The photocatalytic activity of undoped and tungsten doped Al2O3 /ZnO coatings is estimated by the photodegradation of methyl orange. The photocatalytic activity of tungsten doped A(2)O(3)/ZnO coatings is higher thanof undoped Al2O3 /ZnO coatings; the best photocatalytic activity is ascribed to coatings formed in supporting electrolyte with addition of 0.3 g/L Na2WO4 center dot 2H(2)O. Tungsten in A(2)O(3)/ZnO coatings acts as a charge trap, thus reducing the recombination rate of photogenerated electron-hole pairs. The results of PL measurements are in agreement with photocatalytic activity. Declining PL intensity corresponds to increasing photocatalytic activity of the coatings, indicating slower recombination of electron-hole pairs.",
publisher = "Elsevier",
journal = "Applied Surface Science",
title = "The formation of tungsten doped Al2O3/ZnO coatings on aluminum by plasma electrolytic oxidation and their application in photocatalysis",
volume = "377",
pages = "37-43",
doi = "10.1016/j.apsusc.2016.03.104"
}

Stojadinović, S., Vasilić, R., Radić, N., Tadić, N., Stefanov, P.,& Grbić, B.. (2016). The formation of tungsten doped Al2O3/ZnO coatings on aluminum by plasma electrolytic oxidation and their application in photocatalysis. in Applied Surface Science
Elsevier., 377, 37-43.
https://doi.org/10.1016/j.apsusc.2016.03.104

Stojadinović S, Vasilić R, Radić N, Tadić N, Stefanov P, Grbić B. The formation of tungsten doped Al2O3/ZnO coatings on aluminum by plasma electrolytic oxidation and their application in photocatalysis. in Applied Surface Science. 2016;377:37-43.
doi:10.1016/j.apsusc.2016.03.104 .

Stojadinović, Stevan, Vasilić, Rastko, Radić, Nenad, Tadić, Nenad, Stefanov, Plamen, Grbić, Boško, "The formation of tungsten doped Al2O3/ZnO coatings on aluminum by plasma electrolytic oxidation and their application in photocatalysis" in Applied Surface Science, 377 (2016):37-43,
https://doi.org/10.1016/j.apsusc.2016.03.104 . .

TY  - JOUR
AU  - Stojadinović, Stevan
AU  - Radić, Nenad
AU  - Grbić, Boško
AU  - Maletić, Slavica
AU  - Stefanov, Plamen
AU  - Pacevski, Aleksandar
AU  - Vasilić, Rastko
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2034
AB  - In this paper, we used plasma electrolytic oxidation (PEO) of titanium in water solution containing 10 g/L Na3PO4 center dot 12H(2)O + 2 g/L Eu2O3 powder for preparation of TiO2:Eu3+ coatings. The surfaces of obtained coatings exhibit a typical PEO porous structure. The energy dispersive X-ray spectroscopy analysis showed that the coatings are mainly composed of Ti, O, P, and Eu; it is observed that Eu content in the coatings increases with PEO time. The X-ray diffraction analysis indicated that the coatings are crystallized and composed of anatase and rutile TiO2 phases, with anatase being the dominant one. X-ray photoelectron spectroscopy revealed that Ti 2p spin-orbit components of TiO2:Eu3+ coatings are shifted towards higher binding energy, with respect to pure TiO2 coatings, suggesting that Eu3+ ions are incorporated into TiO2 lattice. Diffuse reflectance spectroscopy showed that TiO2:Eu3+ coatings exhibit evident red shift with respect to the pure TiO2 coatings. Photoluminescence (PL) emission spectra of TiO2:Eu3+ coatings are characterized by sharp emission bands in orange-red region ascribed to f-f transitions of Eu3+ ions from excited level D-5(0) to lower levels F-7(J) (J=0, 1, 2, 3, and 4). The excitation PL spectra of TiO2:Eu3+ coatings can be divided into two regions: the broad band region from 250 nm to 350 nm associated with charge transfer state of Eu3+ and the series of sharp peaks in the range from 350 nm to 550 rim corresponding to direct excitation of the Eu3+ ions. It is observed that the intensity of peaks in excitation and emission PL spectra increases with the concentration of Eu3+, but the peak positions remain practically unchanged. The ratio of PL emission for electric and magnetic dipole transitions indicates highly asymmetric environment around Eu3+ ions. The photocatalytic activity (PA) of TiO2:Eu3+ coatings is evaluated by measuring the photodegradation of methyl orange under simulated sunlight conditions. It is shown that PEO time, i.e., the amount of Eu3+ incorporated into coatings is an important factor affecting PA; TiO2:Eu3+ coating formed after 1 min of PEO time showed the highest PA.
PB  - Elsevier
T2  - Applied Surface Science
T1  - Structural, photoluminescent and photocatalytic properties of TiO2:Eu3+ coatings formed by plasma electrolytic oxidation
VL  - 370
SP  - 218
EP  - 228
DO  - 10.1016/j.apsusc.2016.02.131
ER  - 

@article{
author = "Stojadinović, Stevan and Radić, Nenad and Grbić, Boško and Maletić, Slavica and Stefanov, Plamen and Pacevski, Aleksandar and Vasilić, Rastko",
year = "2016",
abstract = "In this paper, we used plasma electrolytic oxidation (PEO) of titanium in water solution containing 10 g/L Na3PO4 center dot 12H(2)O + 2 g/L Eu2O3 powder for preparation of TiO2:Eu3+ coatings. The surfaces of obtained coatings exhibit a typical PEO porous structure. The energy dispersive X-ray spectroscopy analysis showed that the coatings are mainly composed of Ti, O, P, and Eu; it is observed that Eu content in the coatings increases with PEO time. The X-ray diffraction analysis indicated that the coatings are crystallized and composed of anatase and rutile TiO2 phases, with anatase being the dominant one. X-ray photoelectron spectroscopy revealed that Ti 2p spin-orbit components of TiO2:Eu3+ coatings are shifted towards higher binding energy, with respect to pure TiO2 coatings, suggesting that Eu3+ ions are incorporated into TiO2 lattice. Diffuse reflectance spectroscopy showed that TiO2:Eu3+ coatings exhibit evident red shift with respect to the pure TiO2 coatings. Photoluminescence (PL) emission spectra of TiO2:Eu3+ coatings are characterized by sharp emission bands in orange-red region ascribed to f-f transitions of Eu3+ ions from excited level D-5(0) to lower levels F-7(J) (J=0, 1, 2, 3, and 4). The excitation PL spectra of TiO2:Eu3+ coatings can be divided into two regions: the broad band region from 250 nm to 350 nm associated with charge transfer state of Eu3+ and the series of sharp peaks in the range from 350 nm to 550 rim corresponding to direct excitation of the Eu3+ ions. It is observed that the intensity of peaks in excitation and emission PL spectra increases with the concentration of Eu3+, but the peak positions remain practically unchanged. The ratio of PL emission for electric and magnetic dipole transitions indicates highly asymmetric environment around Eu3+ ions. The photocatalytic activity (PA) of TiO2:Eu3+ coatings is evaluated by measuring the photodegradation of methyl orange under simulated sunlight conditions. It is shown that PEO time, i.e., the amount of Eu3+ incorporated into coatings is an important factor affecting PA; TiO2:Eu3+ coating formed after 1 min of PEO time showed the highest PA.",
publisher = "Elsevier",
journal = "Applied Surface Science",
title = "Structural, photoluminescent and photocatalytic properties of TiO2:Eu3+ coatings formed by plasma electrolytic oxidation",
volume = "370",
pages = "218-228",
doi = "10.1016/j.apsusc.2016.02.131"
}

Stojadinović, S., Radić, N., Grbić, B., Maletić, S., Stefanov, P., Pacevski, A.,& Vasilić, R.. (2016). Structural, photoluminescent and photocatalytic properties of TiO2:Eu3+ coatings formed by plasma electrolytic oxidation. in Applied Surface Science
Elsevier., 370, 218-228.
https://doi.org/10.1016/j.apsusc.2016.02.131

Stojadinović S, Radić N, Grbić B, Maletić S, Stefanov P, Pacevski A, Vasilić R. Structural, photoluminescent and photocatalytic properties of TiO2:Eu3+ coatings formed by plasma electrolytic oxidation. in Applied Surface Science. 2016;370:218-228.
doi:10.1016/j.apsusc.2016.02.131 .

Stojadinović, Stevan, Radić, Nenad, Grbić, Boško, Maletić, Slavica, Stefanov, Plamen, Pacevski, Aleksandar, Vasilić, Rastko, "Structural, photoluminescent and photocatalytic properties of TiO2:Eu3+ coatings formed by plasma electrolytic oxidation" in Applied Surface Science, 370 (2016):218-228,
https://doi.org/10.1016/j.apsusc.2016.02.131 . .

TY  - JOUR
AU  - Stojadinović, Stevan
AU  - Radić, Nenad
AU  - Grbić, Boško
AU  - Maletić, Slavica
AU  - Stefanov, Plamen
AU  - Pacevski, Aleksandar
AU  - Vasilić, Rastko
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4320
AB  - In this paper, we used plasma electrolytic oxidation (PEO) of titanium in water solution containing 10 g/L Na3PO4 center dot 12H(2)O + 2 g/L Eu2O3 powder for preparation of TiO2:Eu3+ coatings. The surfaces of obtained coatings exhibit a typical PEO porous structure. The energy dispersive X-ray spectroscopy analysis showed that the coatings are mainly composed of Ti, O, P, and Eu; it is observed that Eu content in the coatings increases with PEO time. The X-ray diffraction analysis indicated that the coatings are crystallized and composed of anatase and rutile TiO2 phases, with anatase being the dominant one. X-ray photoelectron spectroscopy revealed that Ti 2p spin-orbit components of TiO2:Eu3+ coatings are shifted towards higher binding energy, with respect to pure TiO2 coatings, suggesting that Eu3+ ions are incorporated into TiO2 lattice. Diffuse reflectance spectroscopy showed that TiO2:Eu3+ coatings exhibit evident red shift with respect to the pure TiO2 coatings. Photoluminescence (PL) emission spectra of TiO2:Eu3+ coatings are characterized by sharp emission bands in orange-red region ascribed to f-f transitions of Eu3+ ions from excited level D-5(0) to lower levels F-7(J) (J=0, 1, 2, 3, and 4). The excitation PL spectra of TiO2:Eu3+ coatings can be divided into two regions: the broad band region from 250 nm to 350 nm associated with charge transfer state of Eu3+ and the series of sharp peaks in the range from 350 nm to 550 rim corresponding to direct excitation of the Eu3+ ions. It is observed that the intensity of peaks in excitation and emission PL spectra increases with the concentration of Eu3+, but the peak positions remain practically unchanged. The ratio of PL emission for electric and magnetic dipole transitions indicates highly asymmetric environment around Eu3+ ions. The photocatalytic activity (PA) of TiO2:Eu3+ coatings is evaluated by measuring the photodegradation of methyl orange under simulated sunlight conditions. It is shown that PEO time, i.e., the amount of Eu3+ incorporated into coatings is an important factor affecting PA; TiO2:Eu3+ coating formed after 1 min of PEO time showed the highest PA.
PB  - Elsevier
T2  - Applied Surface Science
T1  - Structural, photoluminescent and photocatalytic properties of TiO2:Eu3+ coatings formed by plasma electrolytic oxidation
VL  - 370
SP  - 218
EP  - 228
DO  - 10.1016/j.apsusc.2016.02.131
ER  - 

@article{
author = "Stojadinović, Stevan and Radić, Nenad and Grbić, Boško and Maletić, Slavica and Stefanov, Plamen and Pacevski, Aleksandar and Vasilić, Rastko",
year = "2016",
abstract = "In this paper, we used plasma electrolytic oxidation (PEO) of titanium in water solution containing 10 g/L Na3PO4 center dot 12H(2)O + 2 g/L Eu2O3 powder for preparation of TiO2:Eu3+ coatings. The surfaces of obtained coatings exhibit a typical PEO porous structure. The energy dispersive X-ray spectroscopy analysis showed that the coatings are mainly composed of Ti, O, P, and Eu; it is observed that Eu content in the coatings increases with PEO time. The X-ray diffraction analysis indicated that the coatings are crystallized and composed of anatase and rutile TiO2 phases, with anatase being the dominant one. X-ray photoelectron spectroscopy revealed that Ti 2p spin-orbit components of TiO2:Eu3+ coatings are shifted towards higher binding energy, with respect to pure TiO2 coatings, suggesting that Eu3+ ions are incorporated into TiO2 lattice. Diffuse reflectance spectroscopy showed that TiO2:Eu3+ coatings exhibit evident red shift with respect to the pure TiO2 coatings. Photoluminescence (PL) emission spectra of TiO2:Eu3+ coatings are characterized by sharp emission bands in orange-red region ascribed to f-f transitions of Eu3+ ions from excited level D-5(0) to lower levels F-7(J) (J=0, 1, 2, 3, and 4). The excitation PL spectra of TiO2:Eu3+ coatings can be divided into two regions: the broad band region from 250 nm to 350 nm associated with charge transfer state of Eu3+ and the series of sharp peaks in the range from 350 nm to 550 rim corresponding to direct excitation of the Eu3+ ions. It is observed that the intensity of peaks in excitation and emission PL spectra increases with the concentration of Eu3+, but the peak positions remain practically unchanged. The ratio of PL emission for electric and magnetic dipole transitions indicates highly asymmetric environment around Eu3+ ions. The photocatalytic activity (PA) of TiO2:Eu3+ coatings is evaluated by measuring the photodegradation of methyl orange under simulated sunlight conditions. It is shown that PEO time, i.e., the amount of Eu3+ incorporated into coatings is an important factor affecting PA; TiO2:Eu3+ coating formed after 1 min of PEO time showed the highest PA.",
publisher = "Elsevier",
journal = "Applied Surface Science",
title = "Structural, photoluminescent and photocatalytic properties of TiO2:Eu3+ coatings formed by plasma electrolytic oxidation",
volume = "370",
pages = "218-228",
doi = "10.1016/j.apsusc.2016.02.131"
}

Stojadinović, S., Radić, N., Grbić, B., Maletić, S., Stefanov, P., Pacevski, A.,& Vasilić, R.. (2016). Structural, photoluminescent and photocatalytic properties of TiO2:Eu3+ coatings formed by plasma electrolytic oxidation. in Applied Surface Science
Elsevier., 370, 218-228.
https://doi.org/10.1016/j.apsusc.2016.02.131

Stojadinović S, Radić N, Grbić B, Maletić S, Stefanov P, Pacevski A, Vasilić R. Structural, photoluminescent and photocatalytic properties of TiO2:Eu3+ coatings formed by plasma electrolytic oxidation. in Applied Surface Science. 2016;370:218-228.
doi:10.1016/j.apsusc.2016.02.131 .

Stojadinović, Stevan, Radić, Nenad, Grbić, Boško, Maletić, Slavica, Stefanov, Plamen, Pacevski, Aleksandar, Vasilić, Rastko, "Structural, photoluminescent and photocatalytic properties of TiO2:Eu3+ coatings formed by plasma electrolytic oxidation" in Applied Surface Science, 370 (2016):218-228,
https://doi.org/10.1016/j.apsusc.2016.02.131 . .

TY  - JOUR
AU  - Stojadinović, Stevan D.J.
AU  - Tadić, Nenad
AU  - Radić, Nenad
AU  - Stojadinovic, B
AU  - Grbić, Boško
AU  - Vasilić, Rastko
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1722
AB  - Mixed Al2O3/ZnO coatings are prepared by conventional DC plasma electrolytic oxidation (PEO) of aluminum in boric acid and borax solution containing ZnO nanoparticles. Scanning electron microscopy equipped with energy dispersive x-ray spectroscopy, x-ray diffraction, and Raman spectroscopy were employed to monitor morphological, structural, and chemical changes of obtained oxide coatings. It was found that chemical and phase compositions strongly depend on PEO time. Photoluminescence and photodegradation of methyl orange served as a tool to estimate potential application of Al2O3/ZnO coatings. Photoluminescence measurements showed that clearly observable bands inherent to Al2O3 and ZnO are present in formed coatings, pointing at oxygen vacancies as the main source of photoluminescence. Longer PEO processing times proved beneficial for enhanced photocatalytic activity.
PB  - Elsevier
T2  - Surface and Coatings Technology
T1  - Synthesis and characterization of Al2O3/ZnO coatings formed by plasma electrolytic oxidation
VL  - 276
SP  - 573
EP  - 579
DO  - 10.1016/j.surfcoat.2015.06.013
ER  - 

@article{
author = "Stojadinović, Stevan D.J. and Tadić, Nenad and Radić, Nenad and Stojadinovic, B and Grbić, Boško and Vasilić, Rastko",
year = "2015",
abstract = "Mixed Al2O3/ZnO coatings are prepared by conventional DC plasma electrolytic oxidation (PEO) of aluminum in boric acid and borax solution containing ZnO nanoparticles. Scanning electron microscopy equipped with energy dispersive x-ray spectroscopy, x-ray diffraction, and Raman spectroscopy were employed to monitor morphological, structural, and chemical changes of obtained oxide coatings. It was found that chemical and phase compositions strongly depend on PEO time. Photoluminescence and photodegradation of methyl orange served as a tool to estimate potential application of Al2O3/ZnO coatings. Photoluminescence measurements showed that clearly observable bands inherent to Al2O3 and ZnO are present in formed coatings, pointing at oxygen vacancies as the main source of photoluminescence. Longer PEO processing times proved beneficial for enhanced photocatalytic activity.",
publisher = "Elsevier",
journal = "Surface and Coatings Technology",
title = "Synthesis and characterization of Al2O3/ZnO coatings formed by plasma electrolytic oxidation",
volume = "276",
pages = "573-579",
doi = "10.1016/j.surfcoat.2015.06.013"
}

Stojadinović, S. D.J., Tadić, N., Radić, N., Stojadinovic, B., Grbić, B.,& Vasilić, R.. (2015). Synthesis and characterization of Al2O3/ZnO coatings formed by plasma electrolytic oxidation. in Surface and Coatings Technology
Elsevier., 276, 573-579.
https://doi.org/10.1016/j.surfcoat.2015.06.013

Stojadinović SD, Tadić N, Radić N, Stojadinovic B, Grbić B, Vasilić R. Synthesis and characterization of Al2O3/ZnO coatings formed by plasma electrolytic oxidation. in Surface and Coatings Technology. 2015;276:573-579.
doi:10.1016/j.surfcoat.2015.06.013 .

Stojadinović, Stevan D.J., Tadić, Nenad, Radić, Nenad, Stojadinovic, B, Grbić, Boško, Vasilić, Rastko, "Synthesis and characterization of Al2O3/ZnO coatings formed by plasma electrolytic oxidation" in Surface and Coatings Technology, 276 (2015):573-579,
https://doi.org/10.1016/j.surfcoat.2015.06.013 . .

TY  - JOUR
AU  - Vasilić, Rastko
AU  - Stojadinović, Stevan D.J.
AU  - Radić, Nenad
AU  - Stefanov, P
AU  - Dohcevic-Mitrovic, Z
AU  - Grbić, Boško
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1744
AB  - In this paper, we have investigated one-step preparation of vanadium doped TiO2 coatings formed by plasma electrolytic oxidation (PEO) of titanium in electrolyte containing 10 g/L Na3PO4 center dot 12H(2)O + 0.5 g/L NH4VO3. The morphology, phase structure, and elemental composition of the formed coatings were characterized by atomic force microscopy (AFM), x-ray diffraction (XRD), and x-ray photoelectron spectroscopy (XPS) techniques. Ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS) was employed to evaluate the band gap energy of obtained coatings. Vanadium doped TiO2 coatings are partly crystallized and mainly composed of anatase phase TiO2, with up to about 2 wt% of vanadium present in the surface layer of the oxide. The valence band photoelectron spectra and UV-Vis DRS showed that vanadium doped TiO2 coatings exhibit notable red shift with respect to the pure TiO2 coatings. The photocatalytic activity was evaluated by monitoring the degradation of methyl orange under simulated sunlight conditions. Photocatalytic activity of vanadium doped TiO2 coatings increases with PEO time. Prolonged PEO times result in higher roughness of obtained coatings, thus increasing surface area available for methyl orange degradation. Vanadium doped TiO2 coatings obtained after 180 s of PEO time exhibit the best photocatalytic activity and about 67% of methyl orange is degraded after 12 h of irradiation under simulated sunlight.
PB  - Elsevier Science Sa, Lausanne
T2  - Materials Chemistry and Physics
T1  - One-step preparation and photocatalytic performance of vanadium doped TiO2 coatings
VL  - 151
SP  - 337
EP  - 344
DO  - 10.1016/j.matchemphys.2014.11.077
ER  - 

@article{
author = "Vasilić, Rastko and Stojadinović, Stevan D.J. and Radić, Nenad and Stefanov, P and Dohcevic-Mitrovic, Z and Grbić, Boško",
year = "2015",
abstract = "In this paper, we have investigated one-step preparation of vanadium doped TiO2 coatings formed by plasma electrolytic oxidation (PEO) of titanium in electrolyte containing 10 g/L Na3PO4 center dot 12H(2)O + 0.5 g/L NH4VO3. The morphology, phase structure, and elemental composition of the formed coatings were characterized by atomic force microscopy (AFM), x-ray diffraction (XRD), and x-ray photoelectron spectroscopy (XPS) techniques. Ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS) was employed to evaluate the band gap energy of obtained coatings. Vanadium doped TiO2 coatings are partly crystallized and mainly composed of anatase phase TiO2, with up to about 2 wt% of vanadium present in the surface layer of the oxide. The valence band photoelectron spectra and UV-Vis DRS showed that vanadium doped TiO2 coatings exhibit notable red shift with respect to the pure TiO2 coatings. The photocatalytic activity was evaluated by monitoring the degradation of methyl orange under simulated sunlight conditions. Photocatalytic activity of vanadium doped TiO2 coatings increases with PEO time. Prolonged PEO times result in higher roughness of obtained coatings, thus increasing surface area available for methyl orange degradation. Vanadium doped TiO2 coatings obtained after 180 s of PEO time exhibit the best photocatalytic activity and about 67% of methyl orange is degraded after 12 h of irradiation under simulated sunlight.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Materials Chemistry and Physics",
title = "One-step preparation and photocatalytic performance of vanadium doped TiO2 coatings",
volume = "151",
pages = "337-344",
doi = "10.1016/j.matchemphys.2014.11.077"
}

Vasilić, R., Stojadinović, S. D.J., Radić, N., Stefanov, P., Dohcevic-Mitrovic, Z.,& Grbić, B.. (2015). One-step preparation and photocatalytic performance of vanadium doped TiO2 coatings. in Materials Chemistry and Physics
Elsevier Science Sa, Lausanne., 151, 337-344.
https://doi.org/10.1016/j.matchemphys.2014.11.077

Vasilić R, Stojadinović SD, Radić N, Stefanov P, Dohcevic-Mitrovic Z, Grbić B. One-step preparation and photocatalytic performance of vanadium doped TiO2 coatings. in Materials Chemistry and Physics. 2015;151:337-344.
doi:10.1016/j.matchemphys.2014.11.077 .

Vasilić, Rastko, Stojadinović, Stevan D.J., Radić, Nenad, Stefanov, P, Dohcevic-Mitrovic, Z, Grbić, Boško, "One-step preparation and photocatalytic performance of vanadium doped TiO2 coatings" in Materials Chemistry and Physics, 151 (2015):337-344,
https://doi.org/10.1016/j.matchemphys.2014.11.077 . .

TY  - JOUR
AU  - Petrović, Srđan
AU  - Stojadinović, Stevan D.J.
AU  - Rožić, Ljiljana
AU  - Radić, Nenad
AU  - Grbić, Boško
AU  - Vasilić, Rastko
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1752
AB  - Plasma electrolytic oxidation of titanium in 12-tungstosilicic acid solution was investigated as a model reaction. The influence of the process parameters (concentration of 12-tungstosilicic acid solution, current density, and time) on the selected process response (efficiency of the methyl orange photodecolorization on the TiO2/WO3 coatings) was studied. A mathematical model was developed using a second-order response surface model with a central composite design incorporating the above-mentioned process parameters. The statistical analysis of experimental data indicates that a concentration of 12-tungstosilicic acid solution; process time, interaction between concentration and process time, and interaction between concentration and quadratic of process time have a significant effect on the methyl orange photodecolorization. Besides, the results show that obtained data were adequately fitted into the second-order polynomial model, since the calculated model F value (39.28) is higher than the critical F value. The values of coefficient of determination (R-2 = 0.960) and adjusted coefficient of determination (R-Adj.(2) = 0.937) are close to 1, indicating a high correlation between the observed and the predicted values. This model can also be useful for setting an optimum value of the process parameters for achieving the maximum efficiency of the methyl orange photodecolorization. Under the optimum conditions established in the region of experimentation (C = 1.14 . 10(-3) M, j = 153 mA/cm(2), and t = 58.9 s), a 38.6% (test duration of 8 h) efficiency of the methyl orange photodecolorization is obtained.
PB  - Elsevier
T2  - Surface and Coatings Technology
T1  - Process modelling and analysis of plasma electrolytic oxidation of titanium for TiO2/WO3 thin film photocatalysts by response surface methodology
VL  - 269
SP  - 250
EP  - 257
DO  - 10.1016/j.surfcoat.2014.12.026
ER  - 

@article{
author = "Petrović, Srđan and Stojadinović, Stevan D.J. and Rožić, Ljiljana and Radić, Nenad and Grbić, Boško and Vasilić, Rastko",
year = "2015",
abstract = "Plasma electrolytic oxidation of titanium in 12-tungstosilicic acid solution was investigated as a model reaction. The influence of the process parameters (concentration of 12-tungstosilicic acid solution, current density, and time) on the selected process response (efficiency of the methyl orange photodecolorization on the TiO2/WO3 coatings) was studied. A mathematical model was developed using a second-order response surface model with a central composite design incorporating the above-mentioned process parameters. The statistical analysis of experimental data indicates that a concentration of 12-tungstosilicic acid solution; process time, interaction between concentration and process time, and interaction between concentration and quadratic of process time have a significant effect on the methyl orange photodecolorization. Besides, the results show that obtained data were adequately fitted into the second-order polynomial model, since the calculated model F value (39.28) is higher than the critical F value. The values of coefficient of determination (R-2 = 0.960) and adjusted coefficient of determination (R-Adj.(2) = 0.937) are close to 1, indicating a high correlation between the observed and the predicted values. This model can also be useful for setting an optimum value of the process parameters for achieving the maximum efficiency of the methyl orange photodecolorization. Under the optimum conditions established in the region of experimentation (C = 1.14 . 10(-3) M, j = 153 mA/cm(2), and t = 58.9 s), a 38.6% (test duration of 8 h) efficiency of the methyl orange photodecolorization is obtained.",
publisher = "Elsevier",
journal = "Surface and Coatings Technology",
title = "Process modelling and analysis of plasma electrolytic oxidation of titanium for TiO2/WO3 thin film photocatalysts by response surface methodology",
volume = "269",
pages = "250-257",
doi = "10.1016/j.surfcoat.2014.12.026"
}

Petrović, S., Stojadinović, S. D.J., Rožić, L., Radić, N., Grbić, B.,& Vasilić, R.. (2015). Process modelling and analysis of plasma electrolytic oxidation of titanium for TiO2/WO3 thin film photocatalysts by response surface methodology. in Surface and Coatings Technology
Elsevier., 269, 250-257.
https://doi.org/10.1016/j.surfcoat.2014.12.026

Petrović S, Stojadinović SD, Rožić L, Radić N, Grbić B, Vasilić R. Process modelling and analysis of plasma electrolytic oxidation of titanium for TiO2/WO3 thin film photocatalysts by response surface methodology. in Surface and Coatings Technology. 2015;269:250-257.
doi:10.1016/j.surfcoat.2014.12.026 .

Petrović, Srđan, Stojadinović, Stevan D.J., Rožić, Ljiljana, Radić, Nenad, Grbić, Boško, Vasilić, Rastko, "Process modelling and analysis of plasma electrolytic oxidation of titanium for TiO2/WO3 thin film photocatalysts by response surface methodology" in Surface and Coatings Technology, 269 (2015):250-257,
https://doi.org/10.1016/j.surfcoat.2014.12.026 . .

TY  - JOUR
AU  - Stojadinović, Stevan D.J.
AU  - Vasilić, Rastko
AU  - Radić, Nenad
AU  - Grbić, Boško
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1802
AB  - In this paper, we have investigated photoluminescence and photocatalytic properties of zirconia films formed by plasma electrolytic oxidation (PEO) of zirconium foil in 0.1 M water solution of citric acid. Zirconia films with diverse morphology and phase structure are formed varying the time of PEO process. Characterization by atomic force microscopy and X-ray diffraction shows that obtained zirconia films mostly consist of monoclinic ZrO2 phase, while corresponding roughness and crystallite size increases with PEO time. Diffuse reflectance spectroscopy has shown that zirconia films have a broad absorption band in the range from 200 nm to 330 nm, indicating that zirconia films could be used as a photocatalyst using ultraviolet radiation. Strong photoluminescence bands are present in spectra featuring four distinct peaks in the 300-600 nm range. The peaks are centered at about 418 nm, 440 nm, 464 nm, and 495 nm. Apparent increase of photoluminescence intensity with PEO time is related to an increase of oxygen vacancy defects in zirconia films formed during the process. Also, higher concentration of oxygen vacancy defects in zirconia films result in higher photocatalytic activity.
PB  - Elsevier
T2  - Optical Materials
T1  - Zirconia films formed by plasma electrolytic oxidation: Photo luminescent and photocatalytic properties
VL  - 40
SP  - 20
EP  - 25
DO  - 10.1016/j.optmat.2014.11.041
ER  - 

@article{
author = "Stojadinović, Stevan D.J. and Vasilić, Rastko and Radić, Nenad and Grbić, Boško",
year = "2015",
abstract = "In this paper, we have investigated photoluminescence and photocatalytic properties of zirconia films formed by plasma electrolytic oxidation (PEO) of zirconium foil in 0.1 M water solution of citric acid. Zirconia films with diverse morphology and phase structure are formed varying the time of PEO process. Characterization by atomic force microscopy and X-ray diffraction shows that obtained zirconia films mostly consist of monoclinic ZrO2 phase, while corresponding roughness and crystallite size increases with PEO time. Diffuse reflectance spectroscopy has shown that zirconia films have a broad absorption band in the range from 200 nm to 330 nm, indicating that zirconia films could be used as a photocatalyst using ultraviolet radiation. Strong photoluminescence bands are present in spectra featuring four distinct peaks in the 300-600 nm range. The peaks are centered at about 418 nm, 440 nm, 464 nm, and 495 nm. Apparent increase of photoluminescence intensity with PEO time is related to an increase of oxygen vacancy defects in zirconia films formed during the process. Also, higher concentration of oxygen vacancy defects in zirconia films result in higher photocatalytic activity.",
publisher = "Elsevier",
journal = "Optical Materials",
title = "Zirconia films formed by plasma electrolytic oxidation: Photo luminescent and photocatalytic properties",
volume = "40",
pages = "20-25",
doi = "10.1016/j.optmat.2014.11.041"
}

Stojadinović, S. D.J., Vasilić, R., Radić, N.,& Grbić, B.. (2015). Zirconia films formed by plasma electrolytic oxidation: Photo luminescent and photocatalytic properties. in Optical Materials
Elsevier., 40, 20-25.
https://doi.org/10.1016/j.optmat.2014.11.041

Stojadinović SD, Vasilić R, Radić N, Grbić B. Zirconia films formed by plasma electrolytic oxidation: Photo luminescent and photocatalytic properties. in Optical Materials. 2015;40:20-25.
doi:10.1016/j.optmat.2014.11.041 .

Stojadinović, Stevan D.J., Vasilić, Rastko, Radić, Nenad, Grbić, Boško, "Zirconia films formed by plasma electrolytic oxidation: Photo luminescent and photocatalytic properties" in Optical Materials, 40 (2015):20-25,
https://doi.org/10.1016/j.optmat.2014.11.041 . .

TY  - JOUR
AU  - Stojadinović, Stevan
AU  - Tadić, Nenad
AU  - Radić, Nenad
AU  - Stefanov, Plamen
AU  - Grbić, Boško
AU  - Vasilić, Rastko
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1817
AB  - This article reports on properties of oxide films obtained by anodization of niobium in phosphoric acid before and after the dielectric breakdown. Weak anodic luminescence of barrier oxide films formed during the anodization of niobium is correlated to the existence of morphological defects in the oxide layer. Small sized sparks generated by dielectric breakdown of formed oxide film cause rapid increase of luminescence intensity. The luminescence spectrum of obtained films on niobium under spark discharging is composed of continuum radiation and spectral lines caused by electronic spark discharging transitions in oxygen and hydrogen atoms. Oxide films formed before the breakdown are amorphous, while after the breakdown oxide films are partly crystalline and mainly composed of Nb2O5 hexagonal phase. The photocatalytic activity of obtained oxide films after the breakdown was investigated by monitoring the degradation of methyl orange. Increase of the photocatalytic activity with time is related to an increase of oxygen vacancy defects in oxide films formed during the process. Also, higher concentration of oxygen vacancy defects in oxide films results in higher photoluminescence intensity.
PB  - Elsevier
T2  - Applied Surface Science
T1  - Anodic luminescence, structural, photoluminescent, and photocatalytic properties of anodic oxide films grown on niobium in phosphoric acid
VL  - 355
SP  - 912
EP  - 920
DO  - 10.1016/j.apsusc.2015.07.174
ER  - 

@article{
author = "Stojadinović, Stevan and Tadić, Nenad and Radić, Nenad and Stefanov, Plamen and Grbić, Boško and Vasilić, Rastko",
year = "2015",
abstract = "This article reports on properties of oxide films obtained by anodization of niobium in phosphoric acid before and after the dielectric breakdown. Weak anodic luminescence of barrier oxide films formed during the anodization of niobium is correlated to the existence of morphological defects in the oxide layer. Small sized sparks generated by dielectric breakdown of formed oxide film cause rapid increase of luminescence intensity. The luminescence spectrum of obtained films on niobium under spark discharging is composed of continuum radiation and spectral lines caused by electronic spark discharging transitions in oxygen and hydrogen atoms. Oxide films formed before the breakdown are amorphous, while after the breakdown oxide films are partly crystalline and mainly composed of Nb2O5 hexagonal phase. The photocatalytic activity of obtained oxide films after the breakdown was investigated by monitoring the degradation of methyl orange. Increase of the photocatalytic activity with time is related to an increase of oxygen vacancy defects in oxide films formed during the process. Also, higher concentration of oxygen vacancy defects in oxide films results in higher photoluminescence intensity.",
publisher = "Elsevier",
journal = "Applied Surface Science",
title = "Anodic luminescence, structural, photoluminescent, and photocatalytic properties of anodic oxide films grown on niobium in phosphoric acid",
volume = "355",
pages = "912-920",
doi = "10.1016/j.apsusc.2015.07.174"
}

Stojadinović, S., Tadić, N., Radić, N., Stefanov, P., Grbić, B.,& Vasilić, R.. (2015). Anodic luminescence, structural, photoluminescent, and photocatalytic properties of anodic oxide films grown on niobium in phosphoric acid. in Applied Surface Science
Elsevier., 355, 912-920.
https://doi.org/10.1016/j.apsusc.2015.07.174

Stojadinović S, Tadić N, Radić N, Stefanov P, Grbić B, Vasilić R. Anodic luminescence, structural, photoluminescent, and photocatalytic properties of anodic oxide films grown on niobium in phosphoric acid. in Applied Surface Science. 2015;355:912-920.
doi:10.1016/j.apsusc.2015.07.174 .

Stojadinović, Stevan, Tadić, Nenad, Radić, Nenad, Stefanov, Plamen, Grbić, Boško, Vasilić, Rastko, "Anodic luminescence, structural, photoluminescent, and photocatalytic properties of anodic oxide films grown on niobium in phosphoric acid" in Applied Surface Science, 355 (2015):912-920,
https://doi.org/10.1016/j.apsusc.2015.07.174 . .

TY  - JOUR
AU  - Grbić, Boško
AU  - Radić, Nenad
AU  - Stojadinović, Stevan
AU  - Vasilić, Rastko
AU  - Dohcevic-Mitrovic, Zorana
AU  - Šaponjić, Zoran
AU  - Stefanov, Plamen
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1479
AB  - TiO2/WO3 composites supported on a stainless steel foil were prepared by the spray pyrolysis technique. Content of WO3 was gradually increased from 1 wt% to 100 wt.%, while the coating thickness was limited to about 1 pm. The coatings were characterized by X-ray diffraction, scanning electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy, and Raman spectroscopy. The photocatalytic activity of obtained coatings was investigated by degradation of methyl orange, used as model pollutant. The results show that with increasing WO3 content up to 10 wt.% photoactivity increases as result of better charge separation that could effectively prevent the recombination of photogenerated electrons and holes. Further increase of WO3 content led to decrease of photoactivity.
PB  - Elsevier
T2  - Surface and Coatings Technology
T1  - TiO2/WO3 photocatalytic composite coatings prepared by spray pyrolysis
VL  - 258
SP  - 763
EP  - 771
DO  - 10.1016/j.surfcoat.2014.07.082
ER  - 

@article{
author = "Grbić, Boško and Radić, Nenad and Stojadinović, Stevan and Vasilić, Rastko and Dohcevic-Mitrovic, Zorana and Šaponjić, Zoran and Stefanov, Plamen",
year = "2014",
abstract = "TiO2/WO3 composites supported on a stainless steel foil were prepared by the spray pyrolysis technique. Content of WO3 was gradually increased from 1 wt% to 100 wt.%, while the coating thickness was limited to about 1 pm. The coatings were characterized by X-ray diffraction, scanning electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy, and Raman spectroscopy. The photocatalytic activity of obtained coatings was investigated by degradation of methyl orange, used as model pollutant. The results show that with increasing WO3 content up to 10 wt.% photoactivity increases as result of better charge separation that could effectively prevent the recombination of photogenerated electrons and holes. Further increase of WO3 content led to decrease of photoactivity.",
publisher = "Elsevier",
journal = "Surface and Coatings Technology",
title = "TiO2/WO3 photocatalytic composite coatings prepared by spray pyrolysis",
volume = "258",
pages = "763-771",
doi = "10.1016/j.surfcoat.2014.07.082"
}

Grbić, B., Radić, N., Stojadinović, S., Vasilić, R., Dohcevic-Mitrovic, Z., Šaponjić, Z.,& Stefanov, P.. (2014). TiO2/WO3 photocatalytic composite coatings prepared by spray pyrolysis. in Surface and Coatings Technology
Elsevier., 258, 763-771.
https://doi.org/10.1016/j.surfcoat.2014.07.082

Grbić B, Radić N, Stojadinović S, Vasilić R, Dohcevic-Mitrovic Z, Šaponjić Z, Stefanov P. TiO2/WO3 photocatalytic composite coatings prepared by spray pyrolysis. in Surface and Coatings Technology. 2014;258:763-771.
doi:10.1016/j.surfcoat.2014.07.082 .

Grbić, Boško, Radić, Nenad, Stojadinović, Stevan, Vasilić, Rastko, Dohcevic-Mitrovic, Zorana, Šaponjić, Zoran, Stefanov, Plamen, "TiO2/WO3 photocatalytic composite coatings prepared by spray pyrolysis" in Surface and Coatings Technology, 258 (2014):763-771,
https://doi.org/10.1016/j.surfcoat.2014.07.082 . .

TY  - JOUR
AU  - Petrović, Srđan
AU  - Rožić, Ljiljana
AU  - Grbić, Boško
AU  - Radić, Nenad
AU  - Dostanić, Jasmina
AU  - Stojadinović, Stevan
AU  - Vasilić, Rastko
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1233
AB  - The influence of annealing temperature on the morphology and surface fractal dimension of titanium dioxide (TiO2) films prepared via the spray deposition process was investigated. Thin films with various morphologies were obtained at different temperatures and characterized by X-ray diffraction and atomic force microscopy (AFM). It was found that the crystalline structure of TiO2 films depends strongly on annealing temperature. At higher temperatures, the partial phase transformation of anatase-to-rutile was observed. The morphology and surface fractal dimensions were evaluated by image analysis methods based on AFM micrographs. The results indicate that the value of surface roughness (the standard deviation of the height values within the given area of AFM image) of TiO(2)films increases with increasing annealing temperature. Fractal analysis revealed that the value of the fractal dimension of the samples decreases slowly from 2.23 to 2.15 following the annealing process.
PB  - Soc Chemists Technologists Madeconia, Skopje
T2  - Macedonian Journal of Chemistry and Chemical Engineering
T1  - Morphology and fractal dimension of tio2 thin films
VL  - 32
IS  - 2
SP  - 309
EP  - 317
UR  - https://hdl.handle.net/21.15107/rcub_cer_1233
ER  - 

@article{
author = "Petrović, Srđan and Rožić, Ljiljana and Grbić, Boško and Radić, Nenad and Dostanić, Jasmina and Stojadinović, Stevan and Vasilić, Rastko",
year = "2013",
abstract = "The influence of annealing temperature on the morphology and surface fractal dimension of titanium dioxide (TiO2) films prepared via the spray deposition process was investigated. Thin films with various morphologies were obtained at different temperatures and characterized by X-ray diffraction and atomic force microscopy (AFM). It was found that the crystalline structure of TiO2 films depends strongly on annealing temperature. At higher temperatures, the partial phase transformation of anatase-to-rutile was observed. The morphology and surface fractal dimensions were evaluated by image analysis methods based on AFM micrographs. The results indicate that the value of surface roughness (the standard deviation of the height values within the given area of AFM image) of TiO(2)films increases with increasing annealing temperature. Fractal analysis revealed that the value of the fractal dimension of the samples decreases slowly from 2.23 to 2.15 following the annealing process.",
publisher = "Soc Chemists Technologists Madeconia, Skopje",
journal = "Macedonian Journal of Chemistry and Chemical Engineering",
title = "Morphology and fractal dimension of tio2 thin films",
volume = "32",
number = "2",
pages = "309-317",
url = "https://hdl.handle.net/21.15107/rcub_cer_1233"
}

Petrović, S., Rožić, L., Grbić, B., Radić, N., Dostanić, J., Stojadinović, S.,& Vasilić, R.. (2013). Morphology and fractal dimension of tio2 thin films. in Macedonian Journal of Chemistry and Chemical Engineering
Soc Chemists Technologists Madeconia, Skopje., 32(2), 309-317.
https://hdl.handle.net/21.15107/rcub_cer_1233

Petrović S, Rožić L, Grbić B, Radić N, Dostanić J, Stojadinović S, Vasilić R. Morphology and fractal dimension of tio2 thin films. in Macedonian Journal of Chemistry and Chemical Engineering. 2013;32(2):309-317.
https://hdl.handle.net/21.15107/rcub_cer_1233 .

Petrović, Srđan, Rožić, Ljiljana, Grbić, Boško, Radić, Nenad, Dostanić, Jasmina, Stojadinović, Stevan, Vasilić, Rastko, "Morphology and fractal dimension of tio2 thin films" in Macedonian Journal of Chemistry and Chemical Engineering, 32, no. 2 (2013):309-317,
https://hdl.handle.net/21.15107/rcub_cer_1233 .

TY  - JOUR
AU  - Rožić, Ljiljana
AU  - Petrović, Srđan
AU  - Radić, Nenad
AU  - Stojadinović, Stevan D.J.
AU  - Vasilić, Rastko
AU  - Stefanov, P.
AU  - Grbić, Boško
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1341
AB  - In this study, we have shown that atomic force microscopy is a powerful technique to study the fractal parameters of TiO2/WO3 coatings prepared by plasma electrolytic oxidation (PEO) process. Since the surface roughness of obtained oxide coatings affects their physical properties, an accurate description of roughness parameters is highly desirable. The surface roughness, described by root mean squared and arithmetic average values, is analyzed considering the scans of a series of atomic force micrographs. The results show that the oxide coatings exhibit lower surface roughness in initial stage of PEO process. Also, the surfaces of TiO2/WO3 coatings exhibit fractal behavior. Positive correlation between the fractal dimension and surface roughness of the surfaces of TiO2/WO3 coatings in initial stage of PEO process was found.
PB  - Elsevier Science Sa, Lausanne
T2  - Thin Solid Films
T1  - Fractal approach to surface roughness of TiO2/WO3 coatings formed by plasma electrolytic oxidation process
VL  - 539
SP  - 112
EP  - 116
DO  - 10.1016/j.tsf.2013.05.051
ER  - 

@article{
author = "Rožić, Ljiljana and Petrović, Srđan and Radić, Nenad and Stojadinović, Stevan D.J. and Vasilić, Rastko and Stefanov, P. and Grbić, Boško",
year = "2013",
abstract = "In this study, we have shown that atomic force microscopy is a powerful technique to study the fractal parameters of TiO2/WO3 coatings prepared by plasma electrolytic oxidation (PEO) process. Since the surface roughness of obtained oxide coatings affects their physical properties, an accurate description of roughness parameters is highly desirable. The surface roughness, described by root mean squared and arithmetic average values, is analyzed considering the scans of a series of atomic force micrographs. The results show that the oxide coatings exhibit lower surface roughness in initial stage of PEO process. Also, the surfaces of TiO2/WO3 coatings exhibit fractal behavior. Positive correlation between the fractal dimension and surface roughness of the surfaces of TiO2/WO3 coatings in initial stage of PEO process was found.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Thin Solid Films",
title = "Fractal approach to surface roughness of TiO2/WO3 coatings formed by plasma electrolytic oxidation process",
volume = "539",
pages = "112-116",
doi = "10.1016/j.tsf.2013.05.051"
}

Rožić, L., Petrović, S., Radić, N., Stojadinović, S. D.J., Vasilić, R., Stefanov, P.,& Grbić, B.. (2013). Fractal approach to surface roughness of TiO2/WO3 coatings formed by plasma electrolytic oxidation process. in Thin Solid Films
Elsevier Science Sa, Lausanne., 539, 112-116.
https://doi.org/10.1016/j.tsf.2013.05.051

Rožić L, Petrović S, Radić N, Stojadinović SD, Vasilić R, Stefanov P, Grbić B. Fractal approach to surface roughness of TiO2/WO3 coatings formed by plasma electrolytic oxidation process. in Thin Solid Films. 2013;539:112-116.
doi:10.1016/j.tsf.2013.05.051 .

Rožić, Ljiljana, Petrović, Srđan, Radić, Nenad, Stojadinović, Stevan D.J., Vasilić, Rastko, Stefanov, P., Grbić, Boško, "Fractal approach to surface roughness of TiO2/WO3 coatings formed by plasma electrolytic oxidation process" in Thin Solid Films, 539 (2013):112-116,
https://doi.org/10.1016/j.tsf.2013.05.051 . .

TY  - JOUR
AU  - Stojadinović, Stevan D.J.
AU  - Radić, Nenad
AU  - Vasilić, Rastko
AU  - Petkovic, M.
AU  - Stefanov, P.
AU  - Zekovic, Lj.
AU  - Grbić, Boško
PY  - 2012
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1134
AB  - In this paper, we have investigated photocatalytic properties of TiO2/WO3 coatings formed by plasma electrolytic oxidation (PEO) of titanium in 12-tungstosilicic acid water solution and compared with photocatalytic activity of pure TiO2 coatings. The photocatalytic activity of the coatings is evaluated by measuring the degradation of methyl orange under simulated sunlight conditions. Photocatalytic activity of TiO2/WO3 coatings varied with duration of PEO process and higher photoactivity is obtained for a shorter process time. Photocatalytic activity of TiO2/WO3 coatings is related to morphology and phase and elemental composition of coatings. The oxide coatings morphology is strongly dependent on PEO time. The elemental components of the coatings are Ti, W and O. The oxide coatings are partly crystallized and mainly composed of WO3 and anatase. Decrease in the number of microdischarge channels and agglomeration of particles on the surface leads to a decrease in photocatalytic activity. The reduction of the photocatalytic activity with increased time of PEO process is accompanied with the increase of WO3 concentration on the coatings' surface. Diffuse reflectance spectroscopy has shown that coatings enriched with tungsten oxide exhibit significant red shift with respect to the pure TiO2 coatings. TiO2/WO3 coatings with improved catalytic activity, compared to pure TiO2 coatings, are grouped around energy band gap of 2.6 eV. The results of PL measurements of TiO2/WO3 coatings are in agreement with photocatalytic activities. The increase of PL intensity corresponds to decrease of photocatalytic activity of the coatings, indicating fast recombination of electron-hole pairs.
PB  - Elsevier
T2  - Applied Catalysis B-Environmental
T1  - Photocatalytic properties of TiO2/WO3 coatings formed by plasma electrolytic oxidation of titanium in 12-tungstosilicic acid
VL  - 126
SP  - 334
EP  - 341
DO  - 10.1016/j.apcatb.2012.07.031
ER  - 

@article{
author = "Stojadinović, Stevan D.J. and Radić, Nenad and Vasilić, Rastko and Petkovic, M. and Stefanov, P. and Zekovic, Lj. and Grbić, Boško",
year = "2012",
abstract = "In this paper, we have investigated photocatalytic properties of TiO2/WO3 coatings formed by plasma electrolytic oxidation (PEO) of titanium in 12-tungstosilicic acid water solution and compared with photocatalytic activity of pure TiO2 coatings. The photocatalytic activity of the coatings is evaluated by measuring the degradation of methyl orange under simulated sunlight conditions. Photocatalytic activity of TiO2/WO3 coatings varied with duration of PEO process and higher photoactivity is obtained for a shorter process time. Photocatalytic activity of TiO2/WO3 coatings is related to morphology and phase and elemental composition of coatings. The oxide coatings morphology is strongly dependent on PEO time. The elemental components of the coatings are Ti, W and O. The oxide coatings are partly crystallized and mainly composed of WO3 and anatase. Decrease in the number of microdischarge channels and agglomeration of particles on the surface leads to a decrease in photocatalytic activity. The reduction of the photocatalytic activity with increased time of PEO process is accompanied with the increase of WO3 concentration on the coatings' surface. Diffuse reflectance spectroscopy has shown that coatings enriched with tungsten oxide exhibit significant red shift with respect to the pure TiO2 coatings. TiO2/WO3 coatings with improved catalytic activity, compared to pure TiO2 coatings, are grouped around energy band gap of 2.6 eV. The results of PL measurements of TiO2/WO3 coatings are in agreement with photocatalytic activities. The increase of PL intensity corresponds to decrease of photocatalytic activity of the coatings, indicating fast recombination of electron-hole pairs.",
publisher = "Elsevier",
journal = "Applied Catalysis B-Environmental",
title = "Photocatalytic properties of TiO2/WO3 coatings formed by plasma electrolytic oxidation of titanium in 12-tungstosilicic acid",
volume = "126",
pages = "334-341",
doi = "10.1016/j.apcatb.2012.07.031"
}

Stojadinović, S. D.J., Radić, N., Vasilić, R., Petkovic, M., Stefanov, P., Zekovic, Lj.,& Grbić, B.. (2012). Photocatalytic properties of TiO2/WO3 coatings formed by plasma electrolytic oxidation of titanium in 12-tungstosilicic acid. in Applied Catalysis B-Environmental
Elsevier., 126, 334-341.
https://doi.org/10.1016/j.apcatb.2012.07.031

Stojadinović SD, Radić N, Vasilić R, Petkovic M, Stefanov P, Zekovic L, Grbić B. Photocatalytic properties of TiO2/WO3 coatings formed by plasma electrolytic oxidation of titanium in 12-tungstosilicic acid. in Applied Catalysis B-Environmental. 2012;126:334-341.
doi:10.1016/j.apcatb.2012.07.031 .

Stojadinović, Stevan D.J., Radić, Nenad, Vasilić, Rastko, Petkovic, M., Stefanov, P., Zekovic, Lj., Grbić, Boško, "Photocatalytic properties of TiO2/WO3 coatings formed by plasma electrolytic oxidation of titanium in 12-tungstosilicic acid" in Applied Catalysis B-Environmental, 126 (2012):334-341,
https://doi.org/10.1016/j.apcatb.2012.07.031 . .