Bi_2 WO_6催化剂的合成和表征及其光催化活性  

Synthesis and Characterization of Catalyst Bi_2WO_6 and Its Photocatalytic Activity

作　　者：杨英杰[1] 陈建林[1] 王仪春[1] 姚三丽[1] 徐缇[1] 李娣[1] 

机构地区：[1]南京大学环境学院污染控制与资源化国家重点实验室,江苏南京210093

出　　处：《化工环保》2007年第6期501-505,共5页Environmental Protection of Chemical Industry

摘　　要：以Bi(NO_3)_3和Na_2WO_4为原料,采用水热法合成了可见光催化剂Bi_2WO_6,并采用X射线衍射仪和BET法对其进行了表征。考察了合成温度、Bi_2WO_6加入量、邻氯苯酚(2-CP)浓度、溶液pH等对2-CP光催化降解效果的影响。实验结果表明:在加入140℃下合成的Bi_2WO_6催化剂1g/L、原始pH(pH=5.85)、可见光光照210 min的条件下,对质量浓度为20 mg/L的2-CP溶液进行处理,2-CP去除率最高为97.2%;添加少量H_2O_2对2-CP的降解有促进作用。Bi2 WO6, a new type of visible light photocatalyst, was synthesized by hydrothermal method using Bi（ NO3 ）3 and Na2WO4 as raw materials, and was characterized by XRD and BET. The affecting factors on photocatalytic degradation of o-chlorophenol （2-CP） were investigated. The experimental results show that： when the dosage of Bi2WO6 synthesized at 140 ℃ is 1 g/L, the solution pH is originally neutral （ pH = 5.85 ）, the visible light irradiation time is 210 min and the 2-CP mass concentration is 20 mg/L, the degradation rate of 2-CP is up to 97.6%. A little addition of H2O2 can improve the degradation of 2-CP.

关 键 词：水热法 合成 光催化剂 钨酸铋 邻氯苯酚 

分 类 号：TQ032[化学工程]