In-situ sulfurized In2S3/MoO3@MoS2 heterojunction for visible light induced CO2 photoreduction

Abstract In2S3-decorated MoO3@MoS2 (In/MoO3@MoS2) composites were fabricated via the in-situ sulfurization of nonthermal plasma for the visible light driven photoreduction of CO2 to CH4 and CO. In2S3 can efficiently enhance the photocatalytic activity of In/MoO3@MoS2 in comparison to h-MoO3. The optimal 3-In/MoO3@MoS2 with a In content of 1.33% and the MoS2 thickness of around 10 nm presents the superior conversion efficiency of CO2, of which the yield of CH4 and CO are 29.4 and 35.6 μmol g−1 h−1, respectively. However, the long-term photo-corrosion induced to the declining yield of CH4 and CO after three cycle times. The introduction of In2S3 into MoO3@MoS2 as well as the nonthermal plasma induced S-rich sites and O vacancies is likely to provide the sufficient active sites for promoting CO2 activation and the efficient junction interface for achieving the transfer and separation of charge carriers.