摘要
采用溶剂热法合成了可见光催化剂SnWO4,以甲基橙溶液为目标污染物,研究了催化剂的用量、溶液的初始浓度、盐效应等因素对光催化降解效果的影响.结果表明,甲基橙溶液初始浓度为20 mg.L-1、催化剂的最佳投加量为1.5 g.L-1,SnWO4的催化活性最好,光照反应90 min对目标污染物的去除率可达99.37%;溶液中Na2SO4浓度的增加对降解有抑制作用;催化剂重复使用后催化效果有所下降,但仍然可以保持在初始值的85%左右.
Visible-light-photocatalyst SnWO4 was synthesized by a solvothermal process,and the influence of catalyst dosage,Methyl Orange concentration and salt concentration on the photodegradation of Methyl Orange was investigated.The optimum efficiency for Methyl Orange photodegradation was found to be 99.37% upon photolysis for 90 min at a catalyst dosage of 1.5 g·L-1.In addition,increased salt concentration led to inhibition of Methyl Orange photodegradation.The activity of the recycled photocatalyst remained at about 85% of its initial activity.
出处
《环境化学》
CAS
CSCD
北大核心
2011年第9期1564-1568,共5页
Environmental Chemistry
