农药光催化降解研究进展

Progress in photocatalytic degradation of pesticides

鉴于农药的使用量逐年增大,农药所引起的环境问题和安全问题逐渐受到人们重视,而光催化降解以其节能、高效、应用范围广、污染物降解彻底等优点被广泛应用于农药的降解。文章综述了农药光催化降解的研究进展,包括光催化机理、催化剂的种类、农药的种类、不同条件下农药的降解效果;同时总结了影响降解效率的因素,包括污染物起始浓度、TiO2用量、起始pH值、光源及光照强度、催化剂改性方法等;并对今后的研究方向作了展望。

As the ever-increasing use of pesticides year by year, the problems of environment and safety which were caused by all types of pesticides are given more and more attention. The photocatalytic degradation used to depredate the pesticides is less-energy-consuming, high-efficient, widely-used,thorough degra- dation,etc. The process in photocatalytic degradation of pesticides was discussed in this article,including the photocatalytic mechanism, the type of catalyst, the sort of pesticide, the degradation effect of pesticide, and so on. The factors that affect the photocatalytic degradation were also introduced such as the concentration of contamination, the dosage of TiO2,the pH value, the type and intensity of lamp-house, and the doping methods of catalyst,etc. Finally research prospect was given regarding future research direetion.