文献类型：期刊文献

英文题名：In-situ preparation of BiOBr/Bi-doped CsPbBr3 S-scheme heterojunction for efficient photocatalytic CO2 reduction

作者：Zhu, Qiliang[1]; Huang, Wenxuan[1]; Shen, Jianhua[1]; Jiang, Haibo[1]; Zhu, Yihua[1]; Li, Chunzhong[1,2,3]

机构：[1] Shanghai Engineering Research Centre of Hierarchical Nanomaterials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] School of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China; [3] Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

年份：2024

卷号：499

外文期刊名：Chemical Engineering Journal

收录：EI(收录号：20244217207385)

语种：英文

外文关键词：Bismuth compounds - Bromine compounds - Cesium compounds - Metal halides - Nanocrystals - Photocatalytic activity

摘要：Metal halide perovskite nanocrystals have garnered significant attention in the realm of photocatalytic CO2 reduction in recent years owing to their remarkable reducing properties and high selectivity. However, the issue of low photocatalytic activity due to severe carrier recombination phenomena in perovskite has posed a significant challenge. To address this, a one-pot in-situ preparation strategy was employed to create a BiOBr/Bi-doped perovskite nanocrystal S-scheme heterojunction, resulting in a significant improvement in the CO2 photoreduction performance. The heterojunction material exhibited a CO yield of 151.56 μmolg-1h?1, with a selectivity for CO of 93.6 %. The molar ratio of the components was modulated using an in-situ water aging strategy, yielding a photocatalyst performance that exceeded that of pure BiOBr. The synthesis strategy of one-step in-situ preparation of heterojunctions overcomes the problem of insufficient bonding caused by two-step methods. And various characterizations and DFT calculations strongly support the S-scheme mechanism of the photocatalyst. The active site effectively reduces the energy barrier for the transition from *COOH to *CO intermediate, thereby significantly improving photocatalytic activity. ? 2024 Elsevier B.V.