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Title: Chemically bonded BiVO₄/Bi₁₉Cl₃S₂₇ heterojunction with fast hole extraction dynamics for continuous CO₂ photoreduction
Authors: Huang, Baojing
Fu, Xinxin
Wang, Kai
Wang, Liang
Zhang, Hualei
Liu, Zhongyi
Liu, Bin
Li, Jun
Keywords: Engineering::Chemical engineering
Issue Date: 2023
Source: Huang, B., Fu, X., Wang, K., Wang, L., Zhang, H., Liu, Z., Liu, B. & Li, J. (2023). Chemically bonded BiVO₄/Bi₁₉Cl₃S₂₇ heterojunction with fast hole extraction dynamics for continuous CO₂ photoreduction. Advanced Powder Materials, 100140-.
Journal: Advanced Powder Materials 
Abstract: Surface charge localization and inferior charge transfer efficiency seriously restrict the supply of reactive hydrogen and the reaction dynamics of CO2 photoreduction performance of photocatalysts. Herein, chemically bonded BiVO4/Bi19Cl3S27 (BVO/BCS) S-scheme heterojunction with a strong internal electric field is designed. Experimental and density function theory calculation results confirm that the elaborated heterojunction accelerates the vectorial migration of photogenerated charges from BiVO4 to Bi19Cl3S27 via the interfacial chemical bonding interactions (i.e., Bi-O and Bi-S bonds) between Bi atoms of BVO and S atoms of BCS or Bi atoms of BCS and O atoms of BVO under light irradiation, breaking the interfacial barrier and surface charge localization of Bi19Cl3S27, and further decreasing the energy of reactive hydrogen generation, CO2 absorption and activation. The separation efficiency of photogenerated carriers is much more efficient than that counterpart individual in BVO/BCS S-scheme heterojunction system. As a result, BVO/BCS heterojunction exhibits a significantly improved continuous photocatalytic performance for CO2 reduction and the 24 ​h CO yield reaches 678.27 ​μmol·g−1. This work provides an atomic-level insight into charge transfer kinetics and CO2 reduction mechanism in S-scheme heterojunction.
ISSN: 2772-834X
DOI: 10.1016/j.apmate.2023.100140
Schools: School of Chemistry, Chemical Engineering and Biotechnology 
Rights: © 2023 Central South University. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license (
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CCEB Journal Articles

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