石墨烯-Bi2MoO6可见光催化降解4BS染料

采用溶剂热合成法制备性能稳定的可见光石墨烯-Bi₂MoO₆复合催化剂，研究催化剂对4BS染料的光催化降解效果以及4BS溶液浓度pH、催化剂用量和石墨烯-Bi₂MoO₆复合催化剂重复使用次数等对光催化降解效果的影响。结果表明，在催化剂用量0.50 g·L^－1、染料初始浓度20 mg·L^－1和碱性条件下，光照反应150 min后，4BS去除率达98.5%，催化剂重复使用5次，4BS去除率达78%。复合催化剂结构稳定，可见光下能够有效降解4BS染料。

Photocatalytic degradation of 4BS dye by graphene-Bi2MoO6 under visible light

The visible-light photocatalyst graphene-Bi₂MoO₆ was prepared by the solvothermal synthesis method.The photoactivity of graphene-Bi₂MoO₆ catalyst and the influence of catalyst dosage,the concentration and pH of 4BS dye solution,and recycling times of graphene-Bi₂MoO₆ catalyst on the photodegradation effect of 4BS dye were investigated.The results showed that the removal rate of 4BS dye of 98.5% was attained under the reaction condition as follows:catalyst dosage 0.50 g·L^－1,4BS dye initial concentration 20 mg·L^－1,in alkaline solution,and illumination reaction time 150 min.The removal rate of 4BS dye over the recycled photocatalyst after being repeated use five times reached 78%.The structure of graphene-Bi₂MoO₆ photocatalyst was stable and 4BS dye could be efficiently degraded by graphene-Bi₂MoO₆ photocatalyst under visible irradiation.