声光催化的研究进展

声光催化即超声波和光催化的联合技术,将两者联合起来可以产生协同效应,比两者单独作用可取得更好的效果.超声波产生的机械效应,如分散催化剂、清洗催化剂的表面、强化传质等作用能够促进光催化反应;此外,超声波产生的空化效应,能够导致局部高温高压等极端环境,并产生大量的活性自由基,从而将物质分解.介绍了国内外利用声光催化氧化在污水处理和分解水方面的研究进展,并对反应机理、主要影响因素等进行了评述.

Research progress of sonophotocatalysis

A combination of sonolysis and photocatalysis, named sonophotocatalysis, can lead to a synergistic effect and a much more better result than they react individually. Mechanic effect produced by ultrasonic irradiation can promote photocatalysis through deagglomerating, continuously cleaning and sweeping the solid catalysts, and also strengthening mass transport. In addition, ultrasonic cavitation can result in a very high temperature and high pressure surroundings and generate a large amount of highly reactive free radicals. The development of the combined technology in wastewater treatment and splitting water in recent years is introduced, also including the mechanisms and the main effective factors.