Journal
RARE METALS
Volume 41, Issue 1, Pages 144-154Publisher
NONFERROUS METALS SOC CHINA
DOI: 10.1007/s12598-021-01809-x
Keywords
Sulfur vacancy; CuIn5S8; MoSe2 heterojunction; Photocatalytic CO2 reduction
Funding
- National Natural Science Foundation of China [52064049, 21467030, 51764048]
- Key National Natural Science Foundation of Yunnan Province [2018FA028, 2019FY003023]
- International Joint Research Center for Advanced Energy Materials of Yunnan Province [202003AE140001]
- Key Laboratory of Solid-State Ions for Green Energy of Yunnan University
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The research team designed a novel photocatalyst to convert CO2 into CO, CH4 and other hydrocarbons through solar energy, alleviating the energy shortage problem. The catalyst exhibited superior photocatalytic CO2 reduction performance in experiments.
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 intermediates. 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 reduction. After 8-h light reaction, the outputs of CO and CH4 for the 15.3 wt% CuIn5S8@MoSe2 sample containing S vacancies (V-s) are 30.4 and 14.7 mu mol center dot g(-1), respectively. The mechanism is also investigated in detail through in situ Fourier transform infrared spectroscopy technology.
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