CsPbBr3 perovskite nanocrystals anchoring on monolayer MoS2 nanosheets for efficient photocatalytic CO2 reduction

Photocatalytic CO 2 conversion to valuable fossil fuels has been demonstrated to be a promising approach to reduce emissions of CO 2 and produce renewable energy, which primarily depends on developing the high efficiency of charge separation photocatalysts. Herein, CsPbBr 3 , one typical kind of all-inorganic perovskite nanocrystal, is immobilized on monolayer MoS 2 nanosheets to construct a new and ideal CsPbBr 3 /MoS 2 photocatalyst in the application of CO 2 photoreduction. In comparison with pure CsPbBr 3 , CsPbBr 3 /MoS 2 heterostructures possessed a specific electric field to more efficiently separate charges and generated more active sites for facilitating CO 2 activation, resulting in 3.0 and 2.4 times yields for CO 2 photoreduction to CH 4 and CO, respectively. Detailed characterization methods such as photoluminescence, surface photovoltage spectroscopy and theory calculations indicate the vivid illustrations of photogenerated carries separation which contributes to improving photocatalytic CO 2 conversion efficiency. The present investigation is anticipated to provide a new way for fabricating highly efficient perovskite-based photocatalyst in solar-energy-driven applications.