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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    Special 1    November 2007

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Preparation and photocatalytic activity ofnano-TiO2 codoped with fluorine and ferric
LI Fa-tang(李发堂)1, LIU Rui-hong(刘瑞红)1, ZHAO Di-shun(赵地顺)2,
SUN Zhi-min(孙智敏)1, QU Zhi-ming(曲志明)3

1. College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China;
2. College of Chemical and Pharmaceutical Engineering,
Hebei University of Science and Technology, Shijiazhuang 050018, China;
3. School of Civil Engineering, Hebei Engineering University, Handan 056038, China

Abstract:Nano-F/Fe3+/TiO2 particles were prepared by hydrolysis of tetrabutyl titanate in a mixed CF3COOH-Fe(NO3)3-H2O solution. The photocatalytic decomposition of methylene blue in aqueous solution was used as a probe to evaluate their photocatalytic activities. The powders were characterized by X-ray diffraction (XRD), energy dispersion X-ray spectrum (EDS) and Brunauer-Emmett-Teller (BET) surface area analysis. The results show that F and Fe 3+ are doped into TiO2. The F and Fe3+ doping can help to enhance the nano-TiO2 photocatalytic activity greatly. The appropriate codoping conditions for F-Fe are n(F)/n(TiO2)=2%, n(Fe)/n(TiO2)=0.05%, and the degradation rate of methylene blue at 1 h is improved from 73.2% to 87.5%. The codoped nano-F/Fe3+/TiO2 particles have higher BET specific surface area, smaller crystallite size and higher photocatalytic activity than those of undoped TiO2 particles.

 

Key words: nano-TiO2; F/Fe3+/TiO2; codoping; photocatalytic activity

ISSN 1672-7029
CN 43-1423/U

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