杂多酸光催化降解有机污染物

本文综述了杂多酸对有机污染物的光催化降解，包括自身光致催化作用，半导体协同光催化作用，H₂O₂存在下的类Fenton反应和超声辅助催化作用。杂多酸与有机物反应的机理主要是电子-空穴对的产生和·OH等自由基的生成。概述了杂多酸的结构类型和杂多酸光催化作用的优点和局限性，提出利用掺杂调变杂多酸的晶体结构，降低其能带宽度，提高光催化作用反应的量子效率；探索杂多酸与其它电子受体的组合，特别是与具有可见光活性的物质的组合，以扩大光响应范围，实现可见光催化反应。

Photodegradation of Organic Contaminant by Heteropoly Acid

Heteropoly acid photodegradation to organic pollutants is reviewed in this paper, which includs photoinduced catalysis of itself, semiconductor cooperative photocatalysis, Fenton like reaction in the presence of H₂O₂ and catalysis assisted by ultrasonic wave. Reaction mechenism between heteropoly acid and organic matter is generation of electron-hole pair and producing of three radical such as ·OH. Advantages and limitations of heteropoly acid photodegradation are summarized. It is suggested that crystal structure of heteropoly acid should be changed by doping, for narrowing the energy-band width and increasing the photodegradation quantum efficiency. Heteropoly acid combined with other electron acceptor is discussed, especially with matters processing visible light activity, so as to enlarge photoresponse range and achieve visible light catalytic reaction.