Raman Spectroscopy of Titanium Dioxide Photocatalyst

Abstract

Abstract: Nano-size TiO₂, Fe³⁺-TiO₂, TiO₂/SiO₂, and Fe³⁺-TiO₂/SiO₂ were prepared by sol-gel method. The structural change of TiO₂ caused by different calcining conditions, Fe³⁺-doped contents, and formation of film on silica were studied by FT-Raman and confocal Raman technologies. The experimental results show that the different crystalline phases were observed at different calcinating temperatures. The titanium dioxide powder heated at 350-550 ℃ for two hours forms an anatase phase. The anatase phase materials transforms to rutile phase at 600 ℃ and transits completely to rutile phase calcining for two hours at 750 ℃. After doping Fe³⁺, the FWHM at 144cm^-1 of Fe³⁺-TiO₂ and Fe³⁺-TiO₂/SiO₂ is broadened apparently compared with that of TiO₂ and TiO₂/SiO₂, respectively. Some peaks of TiO₂/SiO₂ coating film has some shift and broadening compared with those of TiO₂.

Key words: Titanium dioxide, Raman spectrum, Doping, Coating film

CLC Number:

O643

TrendMD:

WANG Jian-Qiang, XIN Bai-Fu, YU Hai-Tao, XIE Yu-Tao, ZHAO Bing, FU Hong-Gang . Raman Spectroscopy of Titanium Dioxide Photocatalyst[J]. Chem. J. Chinese Universities, 2003, 24(7): 1237.

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Raman Spectroscopy of Titanium Dioxide Photocatalyst

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