文献类型：期刊文献

英文题名：In-situ preparation of BiOBr/Bi-doped CsPbBr3 3 S-scheme heterojunction for efficient photocatalytic CO2 2 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]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Key Lab Ultrafine Mat Minist Educ, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China;[3]Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Dept Chem Engn, Shanghai 200240, Peoples R China

年份：2024

卷号：499

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001336535000001)】；

基金：This work was supported by the National Natural Science Foundation of China (22178106, 22278136, U22B20143) , the Science and Technology Commission of Shanghai Municipality (23ZR1416400, 22dz1205900) , Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutes of High Learning, and the Fundamental Research Funds for the Central Universities (222201718002) .

语种：英文

外文关键词：Perovskite nanocrystals; BiOBr; S -scheme heterojunction; Photocatalysis; CO 2 reduction

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/Bidoped 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 mu molg-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 onestep 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.