采用溶胶-凝胶法制备了大颗粒TiO2为光催化剂,并通过XRD、SEM、BET等方法对制备的催化剂结构进行了表征,研究了硝基苯溶液光催化降解的影响因素,并根据降解机理讨论了降解过程中的中间产物。结果表明:大颗粒TiO2催化剂有比较高的活性,同时硝基苯初始浓度、降解环境、溶液pH值方面对降解过程有影响。 The photocatalyst was prepared by sol-gel method. The structure of the prepared catalyst was characterized by XRD, SEM and BET. The influencing factors of photocatalytic degradation of nitrobenzene solution were studied. According to the degradation mechanism The intermediates in the degradation process are discussed. The results show that the large particle TiO2 catalyst has high activity, and the initial concentration of nitrobenzene, the degradation environment and the pH value of the solution have an impact on the degradation process.