Controlled hydrothermal processing of ZnO powders in the presence of PVP
Апстракт
In this study low-temperature hydrothermal processing was used for synthesis of ZnO powders with controlled morphology, from micro rods, via hexagonal prism-like to nano-spheres, by varying [Zn2+]/[OH-] molar ratio. The synthesized powders were characterized using XRPD, FE-SEM, UV-Vis diffuse reflectance and Raman spectroscopy. It is noticed that the modification of the particle size and morphology from nanospheres to micro-rods resulted in increased visible light absorption. Besides, the band gap energy of the synthesized ZnO powders showed the red shift (-0.20eV) compared to bulk ZnO. The enhanced visible light absorption of the ZnO powders is related to the existence of lattice defects and the particle surface sensitization by PVP.
Кључне речи:
ZnO / hydrothermal processing / PVPИзвор:
Physical Chemistry 2012 : proceedings. Vol. 1 / 11th International Conference on Fundamental and Applied Aspects of Physical Chemistry, September 24-28, 2012, Belgrade, Serbia, 2012, 431-433Издавач:
- Belgrade : Society of Physical Chemists of Serbia
Финансирање / пројекти:
- Молекуларно дизајнирање наночестица контролисаних морфолошких и физичко-хемијских карактеристика и функционалних материјала на њиховој основи (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45004)
Институција/група
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - CONF AU - Stanković, Ana AU - Stojanović, Zoran S. AU - Veselinović, Ljiljana AU - Marković, Smilja AU - Uskoković, Dragan PY - 2012 UR - https://dais.sanu.ac.rs/123456789/530 AB - In this study low-temperature hydrothermal processing was used for synthesis of ZnO powders with controlled morphology, from micro rods, via hexagonal prism-like to nano-spheres, by varying [Zn2+]/[OH-] molar ratio. The synthesized powders were characterized using XRPD, FE-SEM, UV-Vis diffuse reflectance and Raman spectroscopy. It is noticed that the modification of the particle size and morphology from nanospheres to micro-rods resulted in increased visible light absorption. Besides, the band gap energy of the synthesized ZnO powders showed the red shift (-0.20eV) compared to bulk ZnO. The enhanced visible light absorption of the ZnO powders is related to the existence of lattice defects and the particle surface sensitization by PVP. PB - Belgrade : Society of Physical Chemists of Serbia C3 - Physical Chemistry 2012 : proceedings. Vol. 1 / 11th International Conference on Fundamental and Applied Aspects of Physical Chemistry, September 24-28, 2012, Belgrade, Serbia T1 - Controlled hydrothermal processing of ZnO powders in the presence of PVP SP - 431 EP - 433 UR - https://hdl.handle.net/21.15107/rcub_dais_530 ER -
@conference{ author = "Stanković, Ana and Stojanović, Zoran S. and Veselinović, Ljiljana and Marković, Smilja and Uskoković, Dragan", year = "2012", abstract = "In this study low-temperature hydrothermal processing was used for synthesis of ZnO powders with controlled morphology, from micro rods, via hexagonal prism-like to nano-spheres, by varying [Zn2+]/[OH-] molar ratio. The synthesized powders were characterized using XRPD, FE-SEM, UV-Vis diffuse reflectance and Raman spectroscopy. It is noticed that the modification of the particle size and morphology from nanospheres to micro-rods resulted in increased visible light absorption. Besides, the band gap energy of the synthesized ZnO powders showed the red shift (-0.20eV) compared to bulk ZnO. The enhanced visible light absorption of the ZnO powders is related to the existence of lattice defects and the particle surface sensitization by PVP.", publisher = "Belgrade : Society of Physical Chemists of Serbia", journal = "Physical Chemistry 2012 : proceedings. Vol. 1 / 11th International Conference on Fundamental and Applied Aspects of Physical Chemistry, September 24-28, 2012, Belgrade, Serbia", title = "Controlled hydrothermal processing of ZnO powders in the presence of PVP", pages = "431-433", url = "https://hdl.handle.net/21.15107/rcub_dais_530" }
Stanković, A., Stojanović, Z. S., Veselinović, L., Marković, S.,& Uskoković, D.. (2012). Controlled hydrothermal processing of ZnO powders in the presence of PVP. in Physical Chemistry 2012 : proceedings. Vol. 1 / 11th International Conference on Fundamental and Applied Aspects of Physical Chemistry, September 24-28, 2012, Belgrade, Serbia Belgrade : Society of Physical Chemists of Serbia., 431-433. https://hdl.handle.net/21.15107/rcub_dais_530
Stanković A, Stojanović ZS, Veselinović L, Marković S, Uskoković D. Controlled hydrothermal processing of ZnO powders in the presence of PVP. in Physical Chemistry 2012 : proceedings. Vol. 1 / 11th International Conference on Fundamental and Applied Aspects of Physical Chemistry, September 24-28, 2012, Belgrade, Serbia. 2012;:431-433. https://hdl.handle.net/21.15107/rcub_dais_530 .
Stanković, Ana, Stojanović, Zoran S., Veselinović, Ljiljana, Marković, Smilja, Uskoković, Dragan, "Controlled hydrothermal processing of ZnO powders in the presence of PVP" in Physical Chemistry 2012 : proceedings. Vol. 1 / 11th International Conference on Fundamental and Applied Aspects of Physical Chemistry, September 24-28, 2012, Belgrade, Serbia (2012):431-433, https://hdl.handle.net/21.15107/rcub_dais_530 .