采用两步水热法, 在FTO基底上制备了ZnO/CdS阵列薄膜。利用扫描电镜(SEM)和透射电镜(TEM)对样品的形貌和结构进行了表征, 发现通过改变水热前驱体溶液中的表面活性剂, 可以有效改变ZnO/CdS光电极的形貌。制备了一维和三维结构的ZnO/CdS薄膜, 以制备的薄膜作为光电极, 研究了其光电化学性能, 发现三维ZnO/CdS电极具有更高的光电流密度和能量转化效率, 分析了电极光电化学性能提升的内在机制。

Two-step hydrothermal method was developed to synthesize ZnO/CdS heterojunction film on FTO substrate. The scanning electron microscope (SEM) and transmission electron microscope (TEM) were used to characterize its morphology and structure. It is found that the morphology of ZnO/CdS nanorods will change by changing the surfactant of precursor solution, then one dimensional or three dimensional ZnO/CdS films were obtained. Then by using the films as photoelectrocdes, their photoelectrochemical properties were investigated. It is found that three dimensional ZnO/CdS photoelectrodes own higher photocurrent density and energy exchange efficiency. The internal mechanism for improving the photoelectrochemical properties was also discussed.