A novel S-scheme heterojunction of CsPbBr3 nanocrystals/AgBr nanorods for artificial photosynthesis

Construction of S-scheme heterojunctions has been regarded as an appealing strategy to explore efficient photocatalysts for artificial photosynthesis. Herein, a unique 0D/1D S-scheme heterojunction of CsPbBr 3 /AgBr (CPB/AgBr) was developed by assembling CsPbBr 3 nanocrystals (NCs) onto AgBr nanorods. The effective S-scheme electron transfer between CsPbBr 3 and AgBr boosted charge separation while also maintained the strongly reductive electrons for CO 2 reduction, as proved by electron spin resonance (ESR), steady state photoluminescence (PL), time-resolved photoluminescence (TRPL), etc. As a consequence, The CPB/AgBr heterojunction achieved remarkable photocatalytic performance in CO 2 reduction, with a high electron consumption rate (R electron ) of 141.4 μmol g −1 h −1 , which was 3.0 times that of pristine CsPbBr 3 and 1.65 times that of AgBr, respectively. The current work presents a novel lead halide perovskite (PVK) based S-scheme heterojunction, which is expected to provide some insights into the development of new efficient photocatalysts based on PVKs for solar fuel applications.