Cu2O形貌可调控的ZnO/Au/Cu2O纳米管阵列光电极的制备及性能研究

光电化学分解水技术是利用太阳能解决世界能源问题的一个重要手段。在众多的半导体材料中，ZnO以其低成本、无毒等优良性能而被广泛应用于光电极的制备，但是由于ZnO的带隙较宽以及光生电子-空穴容易复合等缺点，导致其光电性能受到了显著限制。本项目创新性地把一维纳米管阵列基底、半导体异质结、贵金属等离子体共振效应有机结合，并增加晶体形貌及暴露晶面的调控，提出在ZnO一维纳米管阵列结构的基础上，耦合能够与ZnO形成type-II型异质结构的p型窄带隙半导体Cu2O，并沉积Au纳米粒子以引入贵金属的等离子体共振效应，构筑ZnO/Au/Cu2O纳米管阵列复合材料，通过进一步探索Cu2O的形貌及暴露晶面对复合材料光电性能的调控，以提高ZnO基光电极中光生载流子的分离传输效率，最终改善材料的光电化学性能。本项目将为设计和构建高效光电转换效率的ZnO基光电极材料提供实验与理论指导。

Photoelectrochemical technology based on semiconductor for production of hydrogen from water has attracted widespread attention as an important technology for transforming and utilizing solar energy to solve the energy problems. Among various semiconductor materials， ZnO is considered as one of the most promising photoelectrode materials due to its low cost, good chemical stability and non-toxic properties. However, due to the wide band gap width and the high recombination rate of the photogenerated carriers, the widespread application of ZnO materials has been greatly restricted. In this project, one-dimensional nanotube arrays substrate, semiconductor hetero-junction, the plasmon resonance effect of noble metals and the control of crystal morphology and exposed crystal surfaces are combined to improve the photoelectric performance of the ZnO photoelectrode. ZnO/Au/Cu2O nanotube arrays will be fabricated. The ZnO nanotube arrays are beneficial for the high electron transmission rate. The p-type narrow band gap semiconductor Cu2O is coupled with ZnO to form type II heterostructure, and the plasma resonance effect can be introduced by deposition of Au nanoparticles. In addition, the influence of the crystal morphology and exposed crystal surfaces on the photoelectric performance of ZnO /Au/Cu2O will be explored. The research of this project will have a positive propulsion effect for exploring photoelectric functional materials with high photoelectric performance.