增强超四面体硫氧化合物光催化性能的设计原理和合成

Crystalline super tetrahedral oxysulfide is a compound as a solid light catalyst, which has unique advantages such as open structure, high quantum efficiency of visible light, but with poor light corrosion resistance. This project will introduce metal - oxygen unit to super tetrahedral sulfur crystalline to form Tn oxysulfide tetrahedron open framework structure. A typical representative as we recently got is In4Sn16O10S34.This structure regard M-S as the initial site of light excitation and charge separation, and regard electrons and holes localized to end group M - O unit as electronic reaction sites, the compound can couple with the excellent optical performance of sulfur compounds and high stability of oxide. This is a new photocatalytic materials; Synthesis of a series of open frame metal oxysulfide M1M2OS photocatalytic materials combined with different metal M1 and M2;This may control factors such as different coordination modes of metal ions, ratio regulation of sulfur and oxygenetc., select 2- 3 classes high-efficiency and high stability Tn oxysulfide tetrahedron photocatalyst, with moderate band edge and the distortion of the electric field produced within polyhedron. This will provide the design and the synthesis method for ideal photocatalytic materials, which has high catalytic activity and stability of the long-term use.

晶态超四面体硫属化合物作为固体光催化剂具有独特的优点如敞开结构、高可见光量子效率，但耐光腐蚀性差。本项目拟通过引入一定比例的金属-氧结构单元到超四面体硫属晶态，形成Tn硫氧超四面体骨架敞开结构，典型代表如我们最近得到的In4Sn16O10S34。该结构以M-S为光激发和电荷分离的初始位点，电子和空穴定域到端基M-O单元为反应位点，把硫属化合物优异的光电性能和氧化物的高稳定性有序耦合起来，是新一代光催化材料；合成一系列不同金属M1和M2组合的该敞开骨架金属硫氧化合物M1M2OS光催化材料；通过可能调控的组合如金属离子不同配位模式、硫氧比例调控等，筛选出2-3类带边合适和多面体内电场产生畸变的高效高稳定性的Tn氧硫超四面体光催化剂。为最终获得同时具有高光催化活性和长期使用稳定性的理想光催化材料提供设计思路和合成手段。

晶态超四面体硫属化合物作为固体光催化剂具有独特的优点如敞开结构、高可见光量子效率，但耐光腐蚀性差。本项目制备了出基于M2+/M3+/M4+等为主导的双金属体系的Tn 金属硫氧化合物簇结构材料。在此基础上，筛选出两种具有优良的光催化性能的有潜在应用的新型可见光响应的Tn 超四面体簇结构光催化材料，能高效利用可见光降解水中的有机污染物。为最终获得同时具有高光催化活性和长期使用稳定性的理想光催化材料提供设计思路和合成手段。.目前已在国际重要化学期刊发表SCI 收录论文9篇，全部标注了基金号。所有文章申请人均为通讯作者。其中1 篇Chem. Mater.（国际一区）、1 篇Inorg. Chem.（国际一区）、1 篇Crystal Growth & Design（国际二区）、4 篇Inorganic Chemistry Communications 1 篇、New Journal of chemistry和 ACS Omega 各一篇。圆满完成了项目的预期目标。