ZnS/g-C3N4复合型催化剂的制备及其可见光光催化性能

利用共沉淀的方法制备了ZnS/g-C3N4复合型催化剂,并考察其在可见光区对罗丹明B的光降解性能的影响机制.采用TEM、BET、XRD、ICP、FT-IR和XPS等分析手段表征了样品,并评价了样品的光催化活性.结果表明,与g-C3N4相比,ZnS负载量为5wt;的ZnS/g-C3N4催化剂活性会更高一些,且经过四次循环实验后样品的光催化性能未明显失活.这可能归因于ZnS和g-C3N4所形成的异质结构提高了光催化效率.

Synthesis of ZnS/g-C3N4 Compound Catalyst and Its Photocatalytic Properties under Visible-light Irradiation

ZnS/g-C3N4 samples were successfully synthesized via coprecipitation method,and performed on the photodegredation mechanism of rhodamine B under visible-light region.The as-prepared samples were characterized by several techniques such as TEM,BET,XRD,ICP,FT-IR and XPS.The results show that the activity of the catalyst with loading 5wt; ZnS is the best;after four recycle experiments,the photocatalytic activity of the samples is not significantly inactivate.It is attributed that the herterojunction formed by ZnS and g-C3N4 compound improve the photocatalytic activity.