Construction of Highly Ordered Three-dimensional Heterostructured Electrodes for Photoelectrochemical Water Splitting under Visible and Infrared Light

该项目的目的是通过贵金属纳米颗粒、Ln纳米颗粒或窄带隙半导体纳米颗粒的修饰，构建纳米级高度有序的三维（3D）异质结构，从而进一步扩大光吸收范围。纳米颗粒修饰的高度有序3D异质结构与光电化学（PEC）水分解性能之间的构效关系是研究如何提高光电转换效率的主要对象。高度有序的3D纳米结构应使用基于模板的方法制造，包括阳极氧化铝（AAO）纳米多孔和聚苯乙烯（PS）球模板。然后，主要通过水热法对功能纳米颗粒进行修饰，以实现具有可见光和红外光响应能力的3D异质结构光电极。通过对3D异质结构光电极的纳米形貌、半导体基体、能级结构和成分进行优化，详细研究PEC水分解性能，以系统地了解其构效关系。

The purpose of this project is to construct highly ordered three-dimensional (3D) heterostructures at nano-scale with the modification of noble metallic nanoparticles, Ln nanoparticles or narrow gap semiconductor nanoparticles that can further extend light absorption range. The structure-activity relationship between the nanoparticle-modified highly ordered 3D heterostructures and the photoelectrochemical (PEC) water splitting performance is the main object to investigate how to improve the photoelectric conversion efficiency. The highly ordered 3D nanostructures shall be fabricated using template-based method, including anodic alumina oxide (AAO) nano-porous and polystyrene (PS) sphere templates. Then, the modification of functional nanoparticles will be mainly carried out by hydrothermal method in order to realize the 3D heterostructured photoelectrodes with the ability of responding to visible and infrared light. Through the optimization of the 3D heterostructured photoelectrodes in terms of nano-morphology, semiconductor matrixes, energy level structures, and composition, the PEC water splitting performance will be investigated in details to gain systematical understandings of the structure-activity relationship.