不同方法合成的NaInS_2光催化分解水产氢性能研究  

Photocatalytic Activity for Hydrogen Evolution over NaInS_2 Catalysts with Several Synthesis Schemes

作　　者：陈震宇[1] 郭烈锦[1] 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,西安710049

出　　处：《西安交通大学学报》2007年第12期1487-1490,共4页Journal of Xi'an Jiaotong University

基　　金：国家重点基础研究发展规划资助项目(2003CB214500);国家自然科学基金资助项目(90610022)

摘　　要：采用前驱体固相硫化法、共沉淀法、溶剂热法合成了NaInS2光催化剂,通过X射线衍射图谱、紫外-可见漫反射光谱、扫描电镜、X射线光电子能谱等技术对催化剂进行对比研究.研究结果表明,固相硫化所合成的NaInS2光催化剂表面微量的In2S3可能与NaInS2形成了复合半导体,促进了光生载流子的有效分离,因而提高了光解水产氢的性能,达到了61.68μmol/(h.g),同时光稳定性提高的原因可能是因为催化剂具有较小的比表面积.NalnS2 catalysts were synthesized by thermal sulfidation of the precursor, coprecipitation and solvothermal. The catalysts were characterized by X-ray diffraction patterns, UV-Vis diffuse reflection spectrum, scanning electron microscopy and X-ray photoelectron spectroscopy. The reason for the high activity of catalyst by thermal sulfidation of the precursor is that NalnSz and a small amount of In2 S3 on the surface of the catalyst facilitates forming composite semiconductor to enhance the photocharge separation and heighten the hydrogen evolution rate to 61.68 μmol/（h · g）. The stability of the photocatalyst can be obviously improved due to the smaller specific surface area.

关 键 词：光催化 前驱体 硫化 共沉淀 溶剂热 

分 类 号：TQ426.62[化学工程]