In2O3/CdS复合物的制备及光催化性能

Synthesis, Characterization and Photocatalytic Properties of In2O3/CdS Composites

以氧化铟（In2O3）纳米球作为基体，采用水热法制备了氧化铟／硫化镉（In2O3／CdS）复合光催化剂，并利用XRD、SEM等对所制备复合光催化剂进行了表征。结果表明：复合光催化剂由立方相的In2O3纳米球和六方相CdS棒状结构组成，且In20，纳米球附着于CdS棒状结构表面上。光学性能测试和光降解实验发现：所得复合光催化剂与纯In2O3和纯CdS相比，不仅光响应范围增加，而且光催化亚甲基蓝（MB）的活性也得到显著改善。当In2O3／CdS中n（In2O3，）：n（CdS）=1：4时，光催化效率改善尤为明显，当复合催化剂的质量为0．05g时，MB转化率达到96．2％；这可能是由于CdS接受In2O3表面上的光生电子，减少了光生电子与空穴的复合机会，因而提高了光催化降解能力。

Indium oxide （In2O3）/CdS composites were prepared via hydrothermal method. The as-prepared composites were characterized by XRD, SEM and so on techniques. The results showed that the composites consisted of cubic phase In2O3 nanospheres and hexagonal CdS nanorods, and In2O3 nanospheres were attached to the surface of rod-like CdS in the In2O3/CdS composites. In2O3/CdS composite exhibited wider response to light and enhanced photocatalytic activity towards the degradation of methylene blue （MB） under visible light irradiation compared with pure In2O3 and CdS. Especially, In2O3/CdS composite with the In2O3/CdS molar ratio of 1 ： 4 had the highest photocatalytic activity, and when the photocatalyst dosage was 0.05 g, the conversion rate of MB reached 96.2%. The reason might be that CdS could capture the photogenerated electrons on the surface of In2O3 and reduce the probability of recombination of electron-hole pairs, improving the photo-degradation ability of In2O3/CdS.