面向宽光谱高效高选择性光催化还原二氧化碳的钨青铜中功能基元的序构及其构效关系研究

本项目拟在前期研究基础上，以有序六方钨青铜光催化材料为研究对象，通过多种现代表征手段，深入研究不同方法及不同反应条件下合成的钨青铜结构从无序到有序的变化特征；基于催化剂晶体结构和表面微结构分析及理论计算，揭示其结构中碱金属离子与钨空位功能基元序构与其紫外-可见-近红外光催化还原CO2的效率和产物选择性之间的构效关系。通过优化该系列有序光催化剂的合成路线，合理调控其晶体结构、微结构和功能基元序构，以期获得具有最佳性能的功能基元序构的六方钨青铜光催化剂。为设计、合成具有高选择、高转化效率的功能基元序构光催化材料提供一定理论和实践依据，以期实现太阳能－化学能转化效率的变革性提高，满足未来能源技术的重大需求。

Based on the previous research, we will select the tungsten bronze as a typical example to study the ordered photocatalytic materials. The structural changes of tungsten bronze from disorder to order with changing their synthesis conditions will be analyzed by a variety of characterization methods. The structure-activity relationship between the ordered structure and the efficiency, the selectivity of UV-Vis-NIR photocatalytic reduction of CO2 would be revealed through the analyses of the crystal structure and microstructure, and the theoretical calculation. According to optimizing the synthesis route and controlling the crystal structure and microstructure of the photocatalysts, it is expected to obtain hexagonal tungsten bronze photocatalyst with the best performance. This work will provide a theoretical and practical basis for the design and synthesis of the functional unit-ordered photocatalytic materials with high selectivity and high conversion efficiency. It is expected to achieve the transformative improvement of solar-chemical energy conversion efficiency to meet the significant demand for energy technology in the future.