基于三同轴电纺原位生成有序层状Z型全固态(BSC-X)/GR/C3N4复合纳米纤维精密构建及可见光解水制氢行为与机理

光催化分解水制氢在能源开发方面具有重要意义。本课题利用三同轴电纺原位生成技术构建有序层状Z型全固态(BSC-X)/GR/C3N4(BSC:宽带半导体;X:掺杂剂;GR:石墨)复合纳米纤维。利用有序层状特性，能带调控特性，高导电特性、结合异质表界面效应、欧姆接触效应、宽谱吸光效应、微观协同催化效应、提高制氢效率，阐述催化机制和优化构效关系。本课题重点研究材料的制备工艺过程与其结构、性能的关系；研究该纤维的微观结构、化学组成、异质界面、能带调控与光解水制氢性能的关系及对拓展可见光响应范围的作用；研究该类纤维的光生载流子的传输机理和制氢微观机制及其动力学过程，无机、有机牺牲剂及纯水等光催化制氢反应体系与催化剂的高效匹配，寻找具有高活性和良好重复使用性能的Z型全固态类光催化材料。本课题的研究将为探索这类材料的制备、表界面行为调控与微观协同催化机制及在光解水制氢领域的实际应用提供理论基础。

Photocatalytic decomposition of water for hydrogen production is of great significance in energy development. In this subject, the ordered layered Z-type all-solid state (BSC-X)/GR/C3N4 (BSC: broadband semiconductor; X: dopant; GR: graphite) nanocomposite fibers were controlled prepared by in-situ generation technology of tri-coaxial electrospinning. The catalytic mechanism and optimum structure-activity relationship are described by using ordered layered characteristics, energy band regulation characteristics, high conductivity, combined heterostructure interface effect, ohmic contact effect, broad-spectrum absorption effect, micro-synergistic catalytic effect to improve hydrogen production efficiency. This topic focuses on the relationship between the preparation process of the material and its structure and properties, the relationship between the microstructure, chemical composition, heterogeneous interface, energy band regulation and hydrogen production from photolysis of water and its role in expanding the visible light response range. It is studied about the transmission mechanism of photogenerated carriers, the micro-mechanism and hydrogen-production dynamic process of the fibers, and photocatalytic hydrogen production reaction systems (inorganic, organic cattle, pure water etc.) highly matched with catalysts in order to find Z-type all-solid-state photocatalytic materials with high activity and good reusability. The research of this subject will provide theoretical basis for exploring the preparation of such materials, the regulation of surface-interface behavior and micro-synergistic catalytic mechanism, and the practical application in the field of hydrogen production from photolysis water.