水热法制备In2O3/ZnO异质结及其高的光催化性能

采用简单的两步水热法合成了不同In₂O₃质量比的In₂O₃/ZnO异质结复合材料．通过X射线衍射仪(XRD)、紫外-可见分光光度计(UV-vis)和扫描电子显微镜(SEM)对复合材料的结构、形貌和性能进行了表征．同时还使用UV-vis分光光度计测试了异质结降解罗丹明B(RhB)的光催化活性．实验结果表明，与纯ZnO和In₂O₃相比，In₂O₃的引入将ZnO的吸收光谱扩展到可见光区域，从而提高了其光生电子和空穴的分离．此外，In₂O₃/ZnO异质结在可见光照射对RhB具有较高的光催化活性．5 wt%-In₂O₃/ZnO异质结对RhB的降解率为84.3%，且具有良好的光催化稳定性．In₂O₃/ZnO异质结复合材料在有机染料废水的降解中有更广阔的应用前景．

Preparation of In2O3/ZnO heterostructures by a hydrothermal method and their highly photocatalytic properties

Indium oxide/zinc oxide (In2O3/ZnO) heterostructural composites with different In2O3 mass percentages were synthesized via a facile two-step hydrothermal method. The structures, morphologies, and properties of the composite materials were characterized by X-ray diffraction (XRD), ultraviolet-visible (UV-vis) spectrophotometer, and scanning electron microscope (SEM). Furthermore, the photocatalytic activities of In2O3/ZnO heterostructures for degrading Rhodamine B (RhB) were performed by UV-vis spectra. Compared with pure ZnO and In2O3, introducing In2O3 in the ZnO extends its absorption spectra to the visible light region and improves the separation of photogenerated electrons and holes. Besides, the as-obtained In2O3/ZnO heterostructure exhibits higher photocatalytic activities in the degradation of RhB under visible-light irradiation. The degradation rate of RhB by 5 wt%-In2O3/ZnO heterostructure is 84.3 %, and shows good stability of photocatalytic. Such In2O3/ZnO heterostructure has a more promising application in the degradation of organic dye wastewater.