文献类型：期刊文献

英文题名：Construction of S-Scheme Cs2AgBiBr6/BiVO4 Heterojunctions with Fast Charge Transfer Kinetics Toward Promoted Photocatalytic Conversion of CO2

作者：Huang, Wenxuan[1];Zhu, Qiliang[1];Li, Zongyin[2];Zhu, Yihua[1];Shen, Jianhua[1]

机构：[1]East China Univ Sci & Technol, Key Lab Ultrafine Mat, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn,Minist Educ, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Inst Sci & Technol Dev, Shanghai 200237, Peoples R China

年份：2025

卷号：21

期号：20

外文期刊名：SMALL

收录：;EI(收录号：20251318128486);WOS:【SCI-EXPANDED(收录号:WOS:001451496900001)】；

基金：This work was supported by the National Natural Science Foundation of China (22178106, 22278136, and U22B20143), the Science and Technology Commission of Shanghai Municipality (23ZR1416400 and 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：CO2 reduction; internal electric field; lead-free perovskites; photocatalysis; S-scheme heterojunction

摘要：Lead-based halide perovskites (LHPs) have been widely explored by researchers in the field of photocatalysis. However, the poor stability and toxicity of LHPs limit their large-scale applications. Here, lead-free Cs2AgBiBr6/BiVO4 (CABB/BVO)-X% (X = 30, 50, 100) S-scheme heterojunction composites are prepared by electrostatic assembly, and their catalytic activity for photoreduction of CO2 is evaluated. After 3 h of simulated solar irradiation, the prepared CABB/BVO-50% composites show the highest CO yield and electron consumption rate of 143.59 and 352.22 mu mol g(-1), which are 9.2 and 7.8 times higher than that of CABB alone, respectively. In addition, the prepared CABB/BVO-50% photocatalysts exhibit 81.5% high selectivity for CO. The generation of an internal electric field (IEF) between the two materials and the generation of S-scheme heterojunctions are powerfully confirmed by employing various characterization techniques and DFT calculations. The low carrier recombination rate, bandgap-matched heterointerfaces, and exceptional S-scheme charge transfer mechanism are primarily responsible for the outstanding performance. This work provides new insights into the design of efficient lead-free perovskites-based photocatalytic materials.