纳米氧化锌的改性及其光催化降解性能研究进展

Research progress on modification of nano-ZnO and its photocatalytic degradation performance

纳米氧化锌(ZnO)催化剂具有操作简单、应用范围广、无二次污染和环境友好等优点,成为光催化降解水体污染领域的研究热点。研究表明,适当的表面修饰在提高纳米ZnO的稳定性和分散性、增加比表面积、拓宽光响应范围、加速光生电子-空穴对的分离、实现催化剂有效回收及增加纳米材料的循环利用等方面有显著作用,可为纳米ZnO的光催化性能优化提供参考。

Nano-ZnO has attached much attention in photocatalytic degradation of water pollution due to the simple operation,wide application,no secondary pollution and environmentally friendly.The mechanism of photocatalytic degradation was introduced,and the importance of surface modifications were expounded such as morphologies regulation,element doping and material composites.According to recent study,appropriate surface have significant effects on improving the stability and dispersibility of nano-ZnO,increasing the specific surface area,broadening the range of photo-response,accelerating the separation of photogenerated electron hole pairs,realizing effective recovery of catalyst and recycling using.It provided reference for the optimization of photocatalytic performance of nano-ZnO.