Ag-TiO_2-ZnO复合半导体的光催化性能及其动力学研究  

PHOTOCATALYTIC ACTIVITY OF Ag-ZnO-TiO_2 COUPLED SEMICONDUCTOR AND ITS KINETICS

作　　者：姜聚慧[1] 王慧[1] 朱琳芳[1] 王林浩[1] 

机构地区：[1]河南师范大学化学与环境科学学院,绿色化学介质与反应省部共建重点实验室,河南新乡453007

出　　处：《水处理技术》2011年第6期30-33,共4页Technology of Water Treatment

摘　　要：采用溶胶-凝胶法制备了Ag和TiO2的质量分数分别为1%和20%的Ag-TiO2-ZnO光催化剂,研究了溶液初始pH、光源功率、催化剂投加量及染料初始质量浓度对降解活性艳兰KN-R动力学的影响。结果表明,光源功率和催化剂投加量对染料降解影响较大,pH的影响较小,其最佳反应条件分别为紫外汞灯300 W、催化剂投加量3.0 g.L-1和pH=9.30;对初始质量浓度为84 mg.L-1的活性艳兰KN-R光照30 min时,降解率可达99.9%,且在一定初始质量浓度下,光催化降解过程表现为1级反应。Ag（1%）-ZnO-TiO2（20%） photocatalyst was prepared by Sol-Gel method.The effects of operation parameters such as initial pH,intensity of illumination,catalyst loading and initial dye concentration on kinetics of photocatalytic degradation are studied.The results show that all the parameters have apparent efficiency on degradation of reactive brilliant blue KN-R except initial pH,and the experimental conditions are pH is 9.30,300 W,3.0 g·L-1;the degradation rate of the reactive brilliant blue KN-R can reach 99.9% when the illumination time is 60 min,solution initial concentration is 84 mg·L-1.Furthermore,when the initial concentration was under a specific amounts,the photocatalytic degradation process obvious followed the first-order reaction.

关 键 词：Ag-ZnO-TiO2 活性艳兰KN-R 光催化降解 动力学 

分 类 号：X703.1[环境科学与工程—环境工程]