利用太阳能直接全解水产生氢气和氧气对于实现清洁能源具有重要意义。本项目拟通过构建适用于电荷快速传输的材料体系，探索高效的原子层金属氮化物纳米片Z-型体系复合材料以加快电荷分离和水分解动力学，实现水的高效光催化全分解，达到提升太阳能转化效率的目的。主要实现：(1) 建立原子层过渡金属氮化物(Ta3N5、TaON、NbN、W2N)纳米片及原子层过渡金属氮化物复合石墨相氮化碳Z-型机制材料的合成新方法，并阐明其形成机理和调控规律；(2) 以太阳能转化效率〉1%为目标，探索Z-型体系复合材料的微观结构对光催化全解水性能的改善机制；(3) 在不同助催化剂作用下，原子层过渡金属氮化物复合石墨相氮化碳Z-型体系材料光催化全解水的本质机理及其结构稳定性的改善机制。该项目的研究将为清洁氢能源的开发和利用提供新的思路。

Hydrogen and oxygen production via overall water splitting by using solar energy is of great significance for the realization of clean energy. This project aim is to improve the solar energy conversion efficiency. It will achieve high efficient photocatalytic overall water splitting activity by constructing metal nitride nanosheets-based Z-scheme composites which is suitable for rapid charge transport. The main investigation is as follows: (1) to study new synthesis method and route of single-layer transition metal nitrides (Ta3N5, TaON, NbN, W2N) and single-layer transition metal nitride-g- carbon nitride Z-scheme composites, and their formation mechanism. (2) to achieve the goal of the solar energy conversion efficiency > 1%, it will explore the effect of microstructure of Z-scheme composites on the photocatalytic overall water splitting performance. (3) to regulate different co-catalysts, it will study the essential photocatalytic overall water splitting mechanism of single-layer transition metal nitride graphite-g-carbon nitride composites Z-scheme system and the improvement mechanism of their structural stability. The development of the project will provide new ideas for the development and utilization of clean hydrogen energy.