TiO_2-ZnO光催化性能及其降解苯酚废水动力学研究

Photocatalytic Property of TiO_2-ZnO and Degradation Kinetics of Phenol

以紫外光为光源,低浓度苯酚溶液模拟工业废水为处理对象,研究了自制TiO2-ZnO复合材料的光催化活性,考察了苯酚溶液初始浓度、催化剂投放量等对光催化降解的影响,并初步探讨了其反应动力学。结果表明,TiO2-ZnO复合催化剂对苯酚光催化降解反应符合一级动力学方程,光催化效果随苯酚初始浓度增加而降低,催化剂最佳投放量为2 g/L,TiO2-ZnO复合催化剂光催化活性高于纯TiO2、ZnO的光催化活性,是一种降解效果优异的光催化材料。

Using UV-light as the light source,the photocatalytic activities of the home-made TiO2-ZnO have been investigated by the degradation of phenol solution.The effects of the initial concentration of phenol and the amount of the photocatalyst on degradation rate,and the degradation kinetics were investigated.The results indicated that the photodegradation of phenol decomposition reaction followed the rule of first-order reaction,the rate of the decomposition was depressed by the higher initial concentration of phenol,the optimal amount of the photocatalyst was 2 g/L.The TiO2-ZnO is a good photocatalyst,which appears better photodegradation effect than that of the TiO2 and ZnO.