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可见光激发二氧化钛光催化剂的研究进展
作者：王立艳，李嘉冰，张晓佳，盖广清，赵丽，肖姗姗，毕菲
（吉林建筑大学 材料科学与工程学院，建筑节能技术工程实验室，吉林 长春 130118）
摘要：TiO2作为一种性能优异的光催化材料已经应用于环境净化、能量存储和转换领域。尽管TiO2与其它半导体光催化剂相比具有很多优势，但是它的宽带隙（3.2 eV）使其只能在紫外光区（≤390 nm）应用。因此，可见光催化活性TiO2的研究开发是半导体光催化领域面临的关键技术。分析了传统TiO2光催化剂存在的局限性，介绍了各种可见光催化活性TiO2的研究进展，详细讨论了为提高可见光吸收和电子空穴分离，增强光催化活性，确定合适掺杂物的各种方法。对开发新型光催化剂，增强可见光区的光催化性能具有一定的参考价值。
关键词：二氧化钛；光催化剂；可见光
中图分类号：TU53 文献标识码：A 文章编号：1001-702X（2018）12-0082-04
Advances of visible-light activation of TiO2 photocatalysts
WANG Liyan，LI Jiabing，ZHANG Xiaojia，GAI Guangqing，ZHAO Li，XIAO Shanshan，BI Fei
（Laboratory of Building Energy-Saving Technology Engineering，College of Materials Science and Engineering，
Jilin Jianzhu University，Changchun 130118，China）
Abstract：Titanium dioxide（TiO2），as an excellent photoelectrocatalysis material，has been used extensively in the field of environmental purification and energy storage/conversion. Though there are many advantages for the TiO2 compared to other semiconductor photocatalysts，its band gap of 3.2 eV restrains application to the UV-region of the electromagnetic spectrum（≤390 nm）. As a result，development of visible-light active titanium dioxide is one of the key challenges in the field of semiconductor photocatalysis. In this paper，limitations of traditional TiO2 photocatalyst are analyzed. Advances of various visible-light active TiO2 photocatalysts are reviewed. Various strategies to identify appropriate dopants for improved visible-light absorption and electron-hole separation to enhance the photocatalytic activity are discussed in detail. These theoretical and experimental methods would help to develop novel catalysts to enhance the photocatalytic performance in the visible region.
Key words：titanium dioxide，photocatalyst，visible-light