Abstract. A series of ZnO/CdS photoelectrodes with three-dimensional (3-D) structure were synthesized by two-step hydrothermal method. The photoelectrodes were characterized by x-ray diffraction, UV–vis absorption spectrum, and field emission scanning electron microscope. The results confirmed that all samples have similar hierarchical structure composed of CdS sheets and ZnO nanorod. In particular, the sample fabricated by the CdCl2 precursor as the Cd source gave the wider band gap and more porous structure. The photoelectrochemical performance of the samples was estimated by photocurrent density testing in the solution under irradiation. The sample prepared by the CdCl2 precursor exhibited higher photocurrent density than the other three samples due to its 3-D structure, wider band gap, and more porous morphology.

中文翻译：

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水热法合成的三维 ZnO/CdS 光电极的微晶、光学和光电化学性质

摘要。通过两步水热法合成了一系列具有三维（3-D）结构的ZnO/CdS光电极。通过X射线衍射、紫外-可见吸收光谱和场发射扫描电子显微镜对光电极进行表征。结果证实，所有样品都具有相似的分层结构，由 CdS 片和 ZnO 纳米棒组成。特别是，由 CdCl2 前驱体作为 Cd 源制造的样品具有更宽的带隙和更多的多孔结构。通过在辐照下溶液中的光电流密度测试来评估样品的光电化学性能。由于其 3-D 结构、更宽的带隙和更多的多孔形态，由 CdCl2 前驱体制备的样品表现出比其他三个样品更高的光电流密度。