摘要
采用溶胶-凝胶法制备了多孔TiO2薄膜，考察了Fe^3＋、La^3＋掺杂对TiO2薄膜的晶相组成、晶粒大小、表面结构和紫外-可见光吸收性能的影响及其改性机理．结果表明：Fe^3＋掺杂抑制了TiO2的晶相转变，促进了晶粒生长，扩大了光响应范围：La^3＋掺杂抑制了晶粒增长和晶相转变，薄膜的UV-Vis发生蓝移。最后提出了多相掺杂，多角度改性是提高薄膜光催化性能的一种方法。
Crack-free porous titanium dioxide films had been synthesized via sol-gel method. The effect of Fe^3＋、La^3＋ doping on crystalline phase, grain size, morphology, UV-Vis absorption and doping-modification mechanism were investigated. The results indicate that Fe^3＋ depresses the change of phase, promote the growth of grain, and extend the range of visible light response. La^3＋ depresses the grain growth and phase transformation, UV-Vis absorption has a blue shift. It is suggested a method of multiphase doping could be an effective way to improving the photocatalysis performance of TiO2 thin film.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2007年第A07期2425-2427,共3页
Journal of Functional Materials
