In2O3/CdS复合物的制备及光催化性能

Synthesis,Characterization and Photocatalytic Properties of In2O3/CdS Composites

摘要:

摘要: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In2O3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，而且光催化活性也得到显著改善。其中当In2O3/CdS中n（In2O3）：n（CdS）=1:4时，光催化效率改善尤为明显，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。

Abstract:

Abstract: In2O3/CdS composites were prepared via a hydrothermal route using In2O3 nanospheres as the substrate. The as-prepared composites were characterized by XRD and SEM. The results show that the composites consist of cubic phase In2O3 nanospheres and hexagonal CdS nanorods, and In2O3 nanospheres coat on the surface of rod-like CdS nanostructure. The optical property and degradated experiment reslults show that the spectral range of the as-prepared composite is broadened and the photo-catalytic properties are also improved compared with those of pure In2O3 and CdS. When n（In2O3）：n（CdS）=1:4, the photocatalytic ratio of the as-prepared composite is the optimum, which is 96.2%. The reason may be that CdS can capture the electron on the surface of In2O3 and reduces the probability of recombination of electron-hole pairs, improving the photo-degradation ability of In2O3/CdS.