Effects of thermal treatment under different atmospheres on the spectroscopic properties of nanocrystalline TiO2

Effects of thermal treatment under different atmospheres on the spectroscopic properties of nanocrystalline TiO2

The anatase nanocrystalline TiO2 samples were synthesized by a sol-gel method with a thermal treatment under air and oxygen atmospheres at 500 °C and investigated by x-ray powder diffraction, ultraviolet-visible diffuse reflectance spectra (UV-vis DRSs), Raman spectra, and photoluminescence (PL) spe...

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Veröffentlicht in:Journal of applied physics 2008-05, Vol.103 (10)
Hauptverfasser: Zhang, Huarong, Xie, Chaofei, Zhang, Yanfang, Liu, Guangsheng, Li, Zonghui, Liu, Caiyun, Ma, Xingping, Zhang, W. F.
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container_issue 10
container_start_page
container_title Journal of applied physics
container_volume 103
creator Zhang, Huarong
Xie, Chaofei
Zhang, Yanfang
Liu, Guangsheng
Li, Zonghui
Liu, Caiyun
Ma, Xingping
Zhang, W. F.
description The anatase nanocrystalline TiO2 samples were synthesized by a sol-gel method with a thermal treatment under air and oxygen atmospheres at 500 °C and investigated by x-ray powder diffraction, ultraviolet-visible diffuse reflectance spectra (UV-vis DRSs), Raman spectra, and photoluminescence (PL) spectra, respectively. Compared to the sample calcined in air, there were slight differences in the lattice parameter and Raman line shape for the sample calcined in oxygen. UV-vis DRSs exhibited a visible redshift of the absorption edge, which could be understood by Burstein–Moss effect. Different calcination atmospheres led the obvious variations of intensity, position, and linewidth in the PL spectra, which could be attributed to the surface oxygen defect changes.
doi_str_mv 10.1063/1.2924341
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title Effects of thermal treatment under different atmospheres on the spectroscopic properties of nanocrystalline TiO2
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