S vacant Culn5S8 confined in a few-layer MoSe2 with interlayer-expanded hollow heterostructures boost photocatalytic CO2 reduction

• 作者: Li-Juan Chen Ting-Ting Liu Shu-Ming Liu Sheng Cai Xiao-Xiao Zou Jing-Wen Jiang Zhi-Yuan Mei Gen-Fu Zhao Xiao-Fei Yang Hong Guo
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2022,（1）
• 所属期刊栏目: RARE METALS(Monthly)
• 页码范围: 144-154
• 页数: 11页
• 语种: 英文

摘要

The conversion of CO2 into CO,CH4 and other hydrocarbons through solar energy can alleviate the energy shortage problem.We design a novel photocatalyst with S defects CuIn5S8@MoSe2 hollow structure.The interlayer-expanded MoSe2 can increase the adsorption of interme-diates.The unique hollow structure can improve the light utilization efficiency and the electron-holes separation.CuIn5S8 with S vacancies in bimetallic sites has high selectivity and photocatalytic reduction of CO2 activity.Therefore,S vacant CuIn5S8 confined in a few-layers MoSe2 with interlayer-expanded hollow heterostructures exhibit super performance for photocatalytic CO2 reduc-tion.After 8-h light reaction,the outputs of CO and CH4 for the 15.3 wt％ CuIn5S8@MoSe2 sample containing S vacancies (Vs) are 30.4 and 14.7 μmol·g-1,respectively.The mechanism is also investigated in detail through in situ Fourier transform infrared spectroscopy technology.