Preparation and photocatalytic activity of nano-TiO₂ codoped with fluorine and ferric

来源期刊：中国有色金属学报(英文版)2007年增刊第1期(Part ⅡB)

论文作者：李发堂 刘瑞红 赵地顺 孙智敏 曲志明

文章页码：713 - 715

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

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.

基金信息：the Natural Science Foundation of Hebei Province, China
the Natural Science Foundation of Hebei University of Science and Technology, China