H_2O_2处理H_3PW_6Mo_6O_(40)/ZrO_2-SiO_2光催化降解甲基橙  

Photocatalytic degradation of methyl orange with H_3PW_6Mo_6O_(40)/ZrO_2-SiO_2 sensitized by H_2O_2

作　　者：杨水金 段国滨 徐玉林 

机构地区：[1]湖北师范大学化学化工学院污染物分析与资源化技术湖北省重点实验室,湖北黄石435002

出　　处：《化学研究与应用》2017年第4期459-464,共6页Chemical Research and Application

基　　金：污染物分析与资源化技术湖北省重点实验室开放基金项目(PA160210)资助;湖北省自然科学基金项目(2014CFA131)资助项目(201313256001)资助

摘　　要：采用浸渍法制备了H_3PW_6Mo_6O_(40)/ZrO_2-SiO_2催化剂,用H_2O_2进行敏化处理,并通过FT-IR、XRD对其进行了表征。探讨了该催化剂对甲基橙溶液的催化降解活性,较系统地研究了溶液的初始浓度、溶液的pH、催化剂用量对光催化降解甲基橙的影响。研究发现:H_3PW_6Mo_6O_(40)/ZrO_2-SiO_2对甲基橙有良好的降解效果。在甲基橙溶液初始浓度为10mg·L^(-1),溶液pH为2.5,催化剂用量为溶液总质量0.5%的条件下光照2.5h,甲基橙的降解率达到91.1%。H_3PW_6Mo_6O_(40)/ZrO_2-SiO_2催化剂光催化降解甲基橙溶液为一级动力学反应。H3PW6Mo6O40/ZrO2-SiO2was prepared by impregnation, sensitized by H202 solution, and characterized by FT-IR and XRD. The photocatalytic degradation of methyl orange by H3PW6Mo6O40/ZrO2-SiO2 undersimulated natural light irradiation was in-vestigated. The results demonstrated that at optimal condition （initial concentration of methyl orange is 10 mg·L- 1 , and the pH is 2. 5 , the dosage of catalyst is 0. 5% based on feed stocks） , the degradation rate of methyl orange is as high as 91. 1 % after 2. 5h sim-ulated natural light irradiation. The reaction of photocatalysis for methyl orange can be expressed as first-order kinetic model.

关 键 词：H3PW6Mo6O4i/ZrO2-SiO2 光催化 降解 甲基橙 

分 类 号：TQ426.91[化学工程]