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

• Published in: Transactions of Nonferrous Metals Society of China Vol. 17; no. A02; pp. 713 - 715
• Main Author: 李发堂 刘瑞红 赵地顺 孙智敏 曲志明
• Format: Journal Article
• Language: English
• Published: 01.11.2007
• Subjects: 光催化活性; 制备方法; 氟掺杂; 纳米二氧化钛; 铁离子掺杂
• ISSN: 1003-6326

Nano-F /Fe^3＋/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 Fe^3＋ 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 l h is improved from 73.2% to 87.5%. The codoped nano-F /Fe^3＋/TiO2 particles have higher BET specific surface area, smaller crystallite size and higher photocatalytic activity than those of undoped TiO2 particles.