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Synergistic coupling of built-in electric field and surface plasmon resonance in Bi/VO-Bi2O2CO3 for boosted photocatalytic CO2-to-CO conversion
Manning Zha, Yuchun Li, Lili Ai*, Rui Sheng, Dianzeng Jia, Nannan Guo, Luxiang Wang*, Chuan Tan
https://doi.org/10.1016/j.cjsc.2026.101009
Bi2O2CO3; Oxygen vacancy; Bi; Photocatalysis; CO2 reduction
ABSTRACT
Heterojunctions of Bi metal modified oxygen vacancy Bi2O2CO3 (referred to as Bi/VO-Bi2O2CO3) were produced using a one-step hydrothermal technique aimed at the photocatalytic reduction of CO2. The presence of oxygen vacancies (VO) not only facilitates the adsorption and activation of CO2 but also enhances the material's light absorption capacity. The built-in electric field formed between Bi and VO-Bi2O2CO3 promotes the separation of photogenerated carriers, while hot electrons generated by surface plasmon resonance (SPR) on the Bi surface further enhance photocatalytic efficiency. Among these, the 1.0-Bi/VO-Bi2O2CO3 sample exhibited the best photocatalytic CO2 reduction performance in a sacrificial agent-free system, achieving a CO yield of 14.8 μmol·g-1·h-1, which is 3.0 times higher than that of BOC. Five cycles of experiments demonstrated the excellent photocatalytic cycling stability of the 1.0-Bi/VO-Bi2O2CO3 sample. In situ FTIR analysis indicates that *COOH and *CO serve as key intermediates in the photocatalytic CO2 reduction of 1.0-Bi/VO-Bi2O2CO3, enabling the derivation of a plausible reaction pathway. This study provides valuable insights into the efficient preparation of high-performance photocatalysts.
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CN 35–1112/TQ, ISSN 0254–5861, Online ISSN: 2949-768X Copyright @ 2022 Chinese Journal of Structural Chemistry-www.Chinese Journal of Structural Chemistry.net. All Rights Reserved 闽ICP备2022002645号-1