Q[6]/CdS-Ag2S复合光催化剂的合成及光催化性质

Synthesis and Photocatalytic Properties of Cucurbit[6]uril/CdS-Ag2S Composite Photocatalyst

CdS因具有独特的光电化学性能而被广泛用于光催化研究,CdS与窄带隙半导体和有机物复合是重要的光催化研究方向。研究采用化学沉淀法制备了六元瓜环(Q[6])复合和Ag2S掺杂的硫化镉光催化剂(Q[6]/CdS-Ag2S),通过不同手段对复合催化剂进行表征。实验以可见光为光源,罗丹明B为模拟污染物,考察了六元瓜环对CdS-Ag2S光催化性能的影响。结果表明:经Q[6]复合后的Q[6]/CdS-Ag2S形貌为菜花状,颗粒粒径变小。复合催化剂Q[6]/CdS-Ag2S的催化性能明显优于CdS-Ag2S,光催化反应110 min,15 mg复合催化剂对100 mL 6 mg/L罗丹明B溶液的催化降解效率达到92.4%。

CdS is widely used in photocatalytic research due to its unique photoelectrochemical properties.CdS recombination with narrow bandgap semiconductors and organic compounds plays an important role in photocatalyst exploration.In this study,a cucurbit[6]uril(Q[6])composite and Ag2S-doped cadmium sulfide photocatalyst(Q[6]/CdS-Ag2S)were prepared by chemical precipitation method and their composite was characterized by different methods.The experiment is designed to use visible light as the light source and Rhodamine B as the simulated pollutant.Meanwhile,the effects of Q[6]on the photocatalytic performance of CdSAg2S were investigated.The results showed that the morphology of Q[6]/CdS-Ag2S composite after cucurbit[6]uril recombination was similar to cauliflower,while the particle size become smaller.Catalytic performance of the composite catalyst Q[6]/CdS-Ag2S was significantly higher than that of CdS-Ag2S,the photocatalytic reaction lasts 110 min,showing the catalytic degradation effciency of 92.4%using 15 mg composite catalyst on 100 mL,6 mg/L Rhodamine B solution.