CsPbBr3 perovskite quantum dots anchored on multiwalled carbon nanotube for efficient CO2 photoreduction

Converting CO 2 into valuable fossil fuels through artificial photosynthesis is regarded as an appealing approach to address the problems of global warming and energy crisis, which primarily depends on the development of robust and effective photocatalysts . Herein, we illustrate the construction and fabrication of a multiwalled carbon nanotube (MWCNT)/CsPbBr 3 perovskite quantum dots (QDs) nanocomposite with efficient CO 2 photoreduction activity. In this photocatalytic system, the highly conductive MWCNT acts as an electron acceptor to inhibit the carrier recombination in the CsPbBr 3 QDs. When the content of MWCNT was 4.0 wt%, the resultant CsPbBr 3 /MWCNT exhibited the optimum photocatalytic performance, with the yields of CO and CH 4 3.14 and 2.13 times that of pristine CsPbBr 3 QDs, respectively. The rapid electron extraction and transfer from CsPbBr 3 QDs to MWCNT, as well as the enhanced visible light harvesting ability accounted for the remarkable photocatalytic performance. This work is anticipated to provide new pathway for designing efficient perovskite-based photocatalyst in energy conversion applications.