文献类型：期刊文献

英文题名：Efficient visible-light photocatalytic H-2 evolution with heterostructured Ag2S modified CdS nanowires

作者：Lu, Congrong[1];Du, Shiwen[2];Zhao, Yanfei[1];Wang, Qi[1];Ren, Kuankuan[1];Li, Chunhe[1];Dou, Weidong[1]

机构：[1]Shaoxing Univ, Dept Phys, Lab Low Dimens Carbon Mat, Shaoxing 312000, Peoples R China;[2]Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China

年份：2021

卷号：11

期号：45

起止页码：28211

外文期刊名：RSC ADVANCES

收录：SCI-EXPANDED(收录号：WOS:000694655300045)、、WOS

基金：The authors are thankful for the support of the Natural Science Foundation of Zhejiang Province, China (Grant No. LQ21B030005 and LY19F040005) and Postdoctoral Science Foundation, China (No. 2021M692459).

语种：英文

外文关键词：Cadmium sulfide - CdS nanoparticles - Conversion efficiency - Heterojunctions - II-VI semiconductors - Light - Nanocomposites - Nanowires - Optical properties - Photocatalytic activity - Sulfide minerals

外文摘要：The low separation efficiency of photogenerated charges and severe photocorrosion seriously impeded the application of CdS in photocatalytic water splitting. Here we report new routes to improve the photocatalytic performance of CdS nanowires (NWs) by decorating with Ag2S nanoparticles, so Ag2S/CdS heterojunction is constructed. The Ag2S/CdS heterojunction exhibited optimal photocatalytic H-2 evolution rate of 777.3 mu mol h(-1) g(-1), which is 12.1 times higher than that of pure CdS. The intrinsic characteristics of Ag2S/CdS nanocomposites, such as structure, optical properties, and surface chemical state are systematically studied by experimental characterizations and theoretical calculations. The comprehensive analysis demonstrates that the heterojunction between Ag2S and CdS accelerates photoinduced electrons transfer from CdS to Ag2S, enhancing their ability for water splitting. Meanwhile, the holes on the valence band of CdS react with the sacrificial agents, thus leading to the efficient separation of photogenerated electron-hole pairs. This work offers a simple route to synthesize one-dimensional CdS-based nanocomposites for efficient energy conversion driven by visible light.