微球形CdIn_(2)S_(4)/ZnO复合材料的制备及其光催化性能研究

Preparation of Microspherical CdIn_(2)S_(4)/ZnO Composite Material and Its Photocatalytic Performance

本文通过程序升温水热法结合水浴方式制备了CdIn2S4/ZnO复合材料,并采用XRD、XPS、UV-Vis/DRS、SEM、N2吸附-脱附等对复合材料的晶形结构和表面物理化学性质进行了表征。结果表明,相比于单体ZnO,微球形复合材料CdIn2S4/ZnO晶型结构更加优异,孔径分布更加均匀,比表面积明显增大,其光吸收范围拓展至可见光区。多模式光催化降解染料亚甲基蓝的实验结果显示,微球形复合材料CdIn2S4/ZnO的光催化活性优于单体ZnO和CdIn2S4,其中CdIn2S4/ZnO摩尔比为1∶5时复合材料的活性最好,其对不同有机污染物均具有光降解能力;另外,光解水制氢实验结果显示,在8h内产氢量达到310.2μmol/g,表明该复合材料具有优异的光解水制氢性能。

In this paper,CdIn2S4/ZnO composites prepared by the temperature-programmed hydrothermal method combined with the water bath method were reported.There crystal structure and surface physicochemical properties were characterized by XRD,XPS,UV-Vis/DRS,SEM and N2 adsorption-desorption.The results showed that the microspherical composites CdIn2S4/ZnO had a better crystal structure,a more uniform pore size distribution,a significant increase in specific surface area,and an extended light absorption range to the visible light region compared with the monomer ZnO.The results of multi-mode photocatalytic degradation of methylene blue showed that the photocatalytic activity of CdIn2S4/ZnO composites was better than that of monomer ZnO and CdIn2S4.CdIn2S4/ZnO composites had the best photocatalytic activity when the molar ratio of CdIn2S4 to ZnO was 1∶5,which showed the photodegradation ability for different organic pollutants.In addition,the experimental results of hydrogen production by photolysis of water showed that the hydrogen production amount reached 310.2μmol/g within 8 h,indicating that the composites had excellent performance of photolysis of water for hydrogen production.