H_3PW_6Mo_6O_(40)/TiO_2-SiO_2光催化降解有机污染物的研究  

Photocatalytic Degradation of Organic Dyes with H_3PW_6Mo_6O_(40)/TiO_2-SiO_2

作　　者：杨水金[1] 彭放[1] 周国辉[1] 陈慧媛[1] 

机构地区：[1]湖北师范学院化学化工学院稀有金属化学湖北省协同创新中心,湖北黄石435002

出　　处：《徐州工程学院学报（自然科学版）》2016年第1期19-26,共8页Journal of Xuzhou Institute of Technology(Natural Sciences Edition)

基　　金：2015年地方高校国家级大学生创新创业训练计划(201513256001);湖北省自然科学基金重点资助(2014CFA131)

摘　　要：文章在甲基橙初始浓度为5mg/L,溶液pH为3.0,氙灯模拟自然光条件下,研究光催化剂H_3PW_6Mo_6O_（40）/TiO_2-SiO_2对有机污染物的降解率.研究发现催化剂的用量为0.9g/L,光降解3.5h,甲基橙的降解率可以达到98.0%;H_3PW_6Mo_6O_（40）/TiO_2-SiO_2对甲基紫、孔雀石绿、亚甲基蓝、罗丹明B和甲基红均具有较高的光催化活性,降解率达93.2%~98.0%.In order to remove aquatic organic dye contaminants utilizing the inexpensive and inexhausti‐ble solar energy ,the Keggin‐type H3 PW6 Mo6 O40 was loaded by the specific surface area TiO2‐SiO2 with the impregnation method .The photocatalytic degradation of methyl orange by H3 PW6 Mo6 O40/TiO2‐SiO2 under simulated natural light irradiation was investigated .At the same time ,the influences of the initial methyl orange concentration ,the solution pH and the catalyst dosage on the photocatalytic degradation ratio of methyl orange were also examined .The results demonstratiod that initial concentration of methyl orange was 5 mg/L ,and the catalyst dosage was 0 .9 g/L ,while the pH was 3 .0 .The degradation ratio of the methyl orange could reach to 98 .0% after the light irradiation time of 3 .5 hours .The reaction of photoca‐talysis for methyl orange was the first‐order kinetic model .The photodegradation of methyl viole ,mala‐chitegreen oxalate ,methylene blue ,fuchsin basic and methyl red were also tested ,and the degradation ratio of dyes could achieve 93 .2% ~98 .0% .

关 键 词：H3PW6MO6O40 TIO2-SIO2 甲基橙 光催化 降解 

分 类 号：TQ426.91[化学工程]