摘要
本文概述了SnO2TiO2复合半导体纳米薄膜的发展历史和研究现状,对比分析了“混合”、“核壳”和“叠层”3种复合薄膜的结构和性能特点,着重论述了叠层结构的SnO2/TiO2复合薄膜的光电化学和光催化特性。结合作者的研究工作,探讨了SnO2/TiO2双层复合薄膜上下层厚度对其光催化活性的影响,指出复合薄膜光催化活性的提高可归因于电子从TiO2向SnO2的迁移。最后对SnO2/TiO2复合薄膜的局限性和发展潜势做一简要分析,强调了该复合薄膜本身的应用特点。
The research history and current focus of SnO2TiO2 composite semiconductor nanofilms are summarized in this paper. Three types of the nanofilms, mixed, core-shell and layer-stacked, are thoroughly elucidated and compared in terms of structure and property. In particular, the optoelectronic and photocatalytic properties of SnO2/TiO2 bilayer nanofilm are emphasized. The dependence of photocatalytic activity of this nanofilm on the TiO2 or SnO2 layer thickness is discussed. The increased photocatalytic activity of SnO2/TiO2 composite nanofilms can be attributed to the improvement of the efficiency of electron transferring from TiO2 to SnO2. The development potential and limitation of the SnO2/TiO2 composite nanofilms are briefly analyzed.
出处
《化学进展》
SCIE
CAS
CSCD
北大核心
2005年第6期1012-1018,共7页
Progress in Chemistry
基金
国家自然科学基金资助项目(No.20407002)
