MoS_(2)/ZnO复合材料的制备及其光催化性能研究

Construction and Photocatalytic Properties of MoS_(2)/ZnO Composites

利用简单水热法制备具有高光催化活性的MoS_(2)/ZnO复合材料,通过XRD、SEM等对其形貌和结构进行表征,通过有机染料的可见光催化降解实验,对材料的光催化活性进行研究.结果显示:当MoS_(2)/ZnO复合材料的摩尔比为1:1时,对10 mg/L亚甲基蓝(MB)溶液经过90 min光催化降解,MB降解率达到99.27%;相比MoS_(2),复合材料MoS_(2)/ZnO对MB的降解效果提高了16.54%;复合材料MoS_(2)/ZnO光催化降解MB的过程符合一级动力学反应,其机理可能是异质界面提高复合型材料的电子-空穴分离,促进光生载流子的分离,提高催化效率.

The MoS_(2)/ZnO composite material with high photocatalytic activity was prepared by hydrothermal reaction,which was characterized by XRD,SEM,and whose photocatalytic activity of organic dyes was evaluated by visible light catalytic degradation experiment.The results showed that when the Molar ratio of MoS_(2)/ZnO composites was 1:1,the degradation rate of 10 mg/L MB could reach 99.27%.Compared with MoS_(2),the degradation effect of MB by the composite material by 16.54%.The photocatalytic degradation of MB by MoS_(2)/ZnO composites was consistent with the first-order kinetic reaction.In this experiment,MoS_(2)/ZnO composites were prepared by hydrothermal method,which improved the electron-hole separation of composite materials by constructing a heterogeneous interface,promoted the separation of photogenerated carriers,and improved the catalytic efficiency.It provides practical data support for the subsequent development of photocatalytic technology.