TY  - JOUR
AU  - Marković, Smilja
AU  - Stanković, Ana
AU  - Dostanić, Jasmina
AU  - Veselinović, Ljiljana
AU  - Mančić, Lidija
AU  - Škapin, Srečo Davor
AU  - Dražić, Goran
AU  - Janković Častvan, Ivona
AU  - Uskoković, Dragan
PY  - 2017
UR  - https://dais.sanu.ac.rs/123456789/2346
AB  - Mechanical milling of commercial ZnO and SnO2 was used to produce a ZnO/SnO2 composite with a high density of surface defects; in particular, zinc interstitials (Zni) and oxygen vacancies (VO). To determine the impact of surface defects on photocatalytic activity, the relative concentration ratio of bulk defects to surface defects was modified by annealing at 400 and 700 °C. The possible application of the ZnO/SnO2 composite as a natural sunlight and UV-light driven photocatalyst was revealed via de-colorization of methylene blue. In both cases the ZnO/SnO2 composite exhibited enhanced photocatalytic activity as compared to the pristine ZnO. In order to investigate the origin of the enhancement, the pristine metal oxides and composites were characterized using a variety of techniques, including X-ray diffraction (XRD), Raman and Fourier transform infrared (FTIR) spectroscopy, field emission scanning electron microscopy (FESEM), laser diffraction particle size analysis, Brunauer–Emmett–Teller, UV-Vis diffuse reflectance and photoluminescence spectroscopy. High-resolution transmission electron microscopy (HRTEM) and elemental mapping analyses were used to reveal the presence of SnO2 nanocrystallites on the surface of larger ZnO particles. The enhanced photocatalytic activity of the composite can be attributed to the synergetic effect of the surface defects and the ZnO/SnO2 heterojunction particles, which facilitated charge separation, thereby hindering the recombination of photogenerated carriers. This study draws attention to mechanical activation as an inexpensive and environmentally friendly technique for the large-scale production of the composite with an enhanced photocatalytic activity under illumination of either UV or sunlight.
PB  - Royal Society of Chemistry
T2  - RSC Advances
T1  - Simultaneous enhancement of natural sunlight- and artificial UV-driven photocatalytic activity of a mechanically activated ZnO/SnO2 composite
SP  - 42725
EP  - 42737
VL  - 7
DO  - 10.1039/C7RA06895F
UR  - https://hdl.handle.net/21.15107/rcub_dais_2346
ER  - 

@article{
author = "Marković, Smilja and Stanković, Ana and Dostanić, Jasmina and Veselinović, Ljiljana and Mančić, Lidija and Škapin, Srečo Davor and Dražić, Goran and Janković Častvan, Ivona and Uskoković, Dragan",
year = "2017",
abstract = "Mechanical milling of commercial ZnO and SnO2 was used to produce a ZnO/SnO2 composite with a high density of surface defects; in particular, zinc interstitials (Zni) and oxygen vacancies (VO). To determine the impact of surface defects on photocatalytic activity, the relative concentration ratio of bulk defects to surface defects was modified by annealing at 400 and 700 °C. The possible application of the ZnO/SnO2 composite as a natural sunlight and UV-light driven photocatalyst was revealed via de-colorization of methylene blue. In both cases the ZnO/SnO2 composite exhibited enhanced photocatalytic activity as compared to the pristine ZnO. In order to investigate the origin of the enhancement, the pristine metal oxides and composites were characterized using a variety of techniques, including X-ray diffraction (XRD), Raman and Fourier transform infrared (FTIR) spectroscopy, field emission scanning electron microscopy (FESEM), laser diffraction particle size analysis, Brunauer–Emmett–Teller, UV-Vis diffuse reflectance and photoluminescence spectroscopy. High-resolution transmission electron microscopy (HRTEM) and elemental mapping analyses were used to reveal the presence of SnO2 nanocrystallites on the surface of larger ZnO particles. The enhanced photocatalytic activity of the composite can be attributed to the synergetic effect of the surface defects and the ZnO/SnO2 heterojunction particles, which facilitated charge separation, thereby hindering the recombination of photogenerated carriers. This study draws attention to mechanical activation as an inexpensive and environmentally friendly technique for the large-scale production of the composite with an enhanced photocatalytic activity under illumination of either UV or sunlight.",
publisher = "Royal Society of Chemistry",
journal = "RSC Advances",
title = "Simultaneous enhancement of natural sunlight- and artificial UV-driven photocatalytic activity of a mechanically activated ZnO/SnO2 composite",
pages = "42725-42737",
volume = "7",
doi = "10.1039/C7RA06895F",
url = "https://hdl.handle.net/21.15107/rcub_dais_2346"
}

Marković, S., Stanković, A., Dostanić, J., Veselinović, L., Mančić, L., Škapin, S. D., Dražić, G., Janković Častvan, I.,& Uskoković, D.. (2017). Simultaneous enhancement of natural sunlight- and artificial UV-driven photocatalytic activity of a mechanically activated ZnO/SnO2 composite. in RSC Advances
Royal Society of Chemistry., 7, 42725-42737.
https://doi.org/10.1039/C7RA06895F
https://hdl.handle.net/21.15107/rcub_dais_2346

Marković S, Stanković A, Dostanić J, Veselinović L, Mančić L, Škapin SD, Dražić G, Janković Častvan I, Uskoković D. Simultaneous enhancement of natural sunlight- and artificial UV-driven photocatalytic activity of a mechanically activated ZnO/SnO2 composite. in RSC Advances. 2017;7:42725-42737.
doi:10.1039/C7RA06895F
https://hdl.handle.net/21.15107/rcub_dais_2346 .

Marković, Smilja, Stanković, Ana, Dostanić, Jasmina, Veselinović, Ljiljana, Mančić, Lidija, Škapin, Srečo Davor, Dražić, Goran, Janković Častvan, Ivona, Uskoković, Dragan, "Simultaneous enhancement of natural sunlight- and artificial UV-driven photocatalytic activity of a mechanically activated ZnO/SnO2 composite" in RSC Advances, 7 (2017):42725-42737,
https://doi.org/10.1039/C7RA06895F .,
https://hdl.handle.net/21.15107/rcub_dais_2346 .

TY  - JOUR
AU  - Lukić, Miodrag J.
AU  - Veselinović, Ljiljana
AU  - Stevanović, Magdalena
AU  - Nunić, Jana
AU  - Dražić, Goran
AU  - Marković, Smilja
AU  - Uskoković, Dragan
PY  - 2014
UR  - https://dais.sanu.ac.rs/123456789/306
AB  - Hydroxyapatite nanopowders were prepared in the presence of different concentrations of zirconium ions. Such crystallization conditions yielded significantly reduced particle size and increased specific surface area. Cell viability and oxidative stress studies showed that biocompatibility was not impaired when compared to pure hydroxyapatite. Non-isothermal sintering implied the possibility for suppressing the reaction between hydroxyapatite and zirconia by limiting it to only calcium phosphates. Stress-induced transformation of tetragonal to monoclinic zirconia is facilitated by total hydroxyapatite to β-tricalcium phosphate phase transformation.
PB  - Elsevier
T2  - Materials Letters
T1  - Hydroxyapatite nanopowders prepared in the presence of zirconium ions
SP  - 296
EP  - 300
VL  - 122
DO  - 10.1016/j.matlet.2014.02.072
UR  - https://hdl.handle.net/21.15107/rcub_dais_306
ER  - 

@article{
author = "Lukić, Miodrag J. and Veselinović, Ljiljana and Stevanović, Magdalena and Nunić, Jana and Dražić, Goran and Marković, Smilja and Uskoković, Dragan",
year = "2014",
abstract = "Hydroxyapatite nanopowders were prepared in the presence of different concentrations of zirconium ions. Such crystallization conditions yielded significantly reduced particle size and increased specific surface area. Cell viability and oxidative stress studies showed that biocompatibility was not impaired when compared to pure hydroxyapatite. Non-isothermal sintering implied the possibility for suppressing the reaction between hydroxyapatite and zirconia by limiting it to only calcium phosphates. Stress-induced transformation of tetragonal to monoclinic zirconia is facilitated by total hydroxyapatite to β-tricalcium phosphate phase transformation.",
publisher = "Elsevier",
journal = "Materials Letters",
title = "Hydroxyapatite nanopowders prepared in the presence of zirconium ions",
pages = "296-300",
volume = "122",
doi = "10.1016/j.matlet.2014.02.072",
url = "https://hdl.handle.net/21.15107/rcub_dais_306"
}

Lukić, M. J., Veselinović, L., Stevanović, M., Nunić, J., Dražić, G., Marković, S.,& Uskoković, D.. (2014). Hydroxyapatite nanopowders prepared in the presence of zirconium ions. in Materials Letters
Elsevier., 122, 296-300.
https://doi.org/10.1016/j.matlet.2014.02.072
https://hdl.handle.net/21.15107/rcub_dais_306

Lukić MJ, Veselinović L, Stevanović M, Nunić J, Dražić G, Marković S, Uskoković D. Hydroxyapatite nanopowders prepared in the presence of zirconium ions. in Materials Letters. 2014;122:296-300.
doi:10.1016/j.matlet.2014.02.072
https://hdl.handle.net/21.15107/rcub_dais_306 .

Lukić, Miodrag J., Veselinović, Ljiljana, Stevanović, Magdalena, Nunić, Jana, Dražić, Goran, Marković, Smilja, Uskoković, Dragan, "Hydroxyapatite nanopowders prepared in the presence of zirconium ions" in Materials Letters, 122 (2014):296-300,
https://doi.org/10.1016/j.matlet.2014.02.072 .,
https://hdl.handle.net/21.15107/rcub_dais_306 .

TY  - JOUR
AU  - Lukić, Miodrag J.
AU  - Veselinović, Ljiljana
AU  - Stevanović, Magdalena
AU  - Nunić, Jana
AU  - Dražić, Goran
AU  - Marković, Smilja
AU  - Uskoković, Dragan
PY  - 2014
UR  - https://dais.sanu.ac.rs/123456789/307
AB  - Hydroxyapatite nanopowders were prepared in the presence of different concentrations of zirconium ions. Such crystallization conditions yielded significantly reduced particle size and increased specific surface area. Cell viability and oxidative stress studies showed that biocompatibility was not impaired when compared to pure hydroxyapatite. Non-isothermal sintering implied the possibility for suppressing the reaction between hydroxyapatite and zirconia by limiting it to only calcium phosphates. Stress-induced transformation of tetragonal to monoclinic zirconia is facilitated by total hydroxyapatite to β-tricalcium phosphate phase transformation.
PB  - Elsevier
T2  - Materials Letters
T1  - Hydroxyapatite nanopowders prepared in the presence of zirconium ions
SP  - 296
EP  - 300
VL  - 122
DO  - 10.1016/j.matlet.2014.02.072
UR  - https://hdl.handle.net/21.15107/rcub_dais_307
ER  - 

@article{
author = "Lukić, Miodrag J. and Veselinović, Ljiljana and Stevanović, Magdalena and Nunić, Jana and Dražić, Goran and Marković, Smilja and Uskoković, Dragan",
year = "2014",
abstract = "Hydroxyapatite nanopowders were prepared in the presence of different concentrations of zirconium ions. Such crystallization conditions yielded significantly reduced particle size and increased specific surface area. Cell viability and oxidative stress studies showed that biocompatibility was not impaired when compared to pure hydroxyapatite. Non-isothermal sintering implied the possibility for suppressing the reaction between hydroxyapatite and zirconia by limiting it to only calcium phosphates. Stress-induced transformation of tetragonal to monoclinic zirconia is facilitated by total hydroxyapatite to β-tricalcium phosphate phase transformation.",
publisher = "Elsevier",
journal = "Materials Letters",
title = "Hydroxyapatite nanopowders prepared in the presence of zirconium ions",
pages = "296-300",
volume = "122",
doi = "10.1016/j.matlet.2014.02.072",
url = "https://hdl.handle.net/21.15107/rcub_dais_307"
}

Lukić, M. J., Veselinović, L., Stevanović, M., Nunić, J., Dražić, G., Marković, S.,& Uskoković, D.. (2014). Hydroxyapatite nanopowders prepared in the presence of zirconium ions. in Materials Letters
Elsevier., 122, 296-300.
https://doi.org/10.1016/j.matlet.2014.02.072
https://hdl.handle.net/21.15107/rcub_dais_307

Lukić MJ, Veselinović L, Stevanović M, Nunić J, Dražić G, Marković S, Uskoković D. Hydroxyapatite nanopowders prepared in the presence of zirconium ions. in Materials Letters. 2014;122:296-300.
doi:10.1016/j.matlet.2014.02.072
https://hdl.handle.net/21.15107/rcub_dais_307 .

Lukić, Miodrag J., Veselinović, Ljiljana, Stevanović, Magdalena, Nunić, Jana, Dražić, Goran, Marković, Smilja, Uskoković, Dragan, "Hydroxyapatite nanopowders prepared in the presence of zirconium ions" in Materials Letters, 122 (2014):296-300,
https://doi.org/10.1016/j.matlet.2014.02.072 .,
https://hdl.handle.net/21.15107/rcub_dais_307 .