Simultaneous enhancement of natural sunlight- and artificial UV-driven photocatalytic activity of a mechanically activated ZnO/SnO2 composite
2017
Аутори
Marković, SmiljaStanković, Ana
Dostanić, Jasmina
Veselinović, Ljiljana
Mančić, Lidija
Škapin, Srečo Davor
Dražić, Goran
Janković Častvan, Ivona
Uskoković, Dragan
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
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.
Кључне речи:
photocatalytic activity / mechanical activation / ZnO and SnO2Извор:
RSC Advances, 2017, 7, 42725-42737Издавач:
- Royal Society of Chemistry
Финансирање / пројекти:
DOI: 10.1039/C7RA06895F
ISSN: 2046-2069
WoS: 000409548200012
Scopus: 2-s2.0-85029113368
Институција/група
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - 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 .