Chinese Journal of Catalysis ›› 2024, Vol. 67: 124-134.DOI: 10.1016/S1872-2067(24)60149-X

• Article • Previous Articles     Next Articles

LSPR-assisted W18O49/ZnO S-scheme heterojunction for efficient photocatalytic CO2 N-formylation of aniline

Jiafa Chena,b, Peng Baia,b, Shibo Yuana,b, Yi Hea,b, Zifan Niua,b, Yicheng Zhaoa,b,d(), Yongdan Lic   

  1. aState Key Laboratory of Chemical Engineering (Tianjin University), Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
    bCollaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
    cDepartment of Chemical and Metallurgical Engineering, School of Chemical Engineering, Aalto University, Kemistintie 1, Espoo, P.O. Box 16100 Aalto FI-00076, Finland
    dHebei Technical Innovation Center for Fuel Hydrogen Production from Industrial By-product Gas, Tangshan 064099, Hebei, China
  • Received:2024-07-29 Accepted:2024-09-19 Online:2024-11-30 Published:2024-11-30
  • Contact: Yicheng Zhao
  • Supported by:
    National Key Research and Development Program of China(2022YFB4101800);National Natural Science Foundation of China(22075205)

Abstract:

Designing highly efficient photocatalyst for the valorization of CO2 is an ideal strategy to reduce greenhouse gas emissions and utilize solar energy. In this study, a S-scheme heterojunction photocatalyst is fabricated by solvothermal impregnation of ZnO on W18O49 for photocatalytic CO2 N-formylation of aniline. The localized surface plasmon resonance effect of W18O49 improves the absorption capacity for long-wave light significantly, and the hot electrons generated in W18O49 with a high energy can migrate to the conduction band of ZnO and thus enhance the photocatalytic reduction ability. Meanwhile, the S-scheme heterojunction facilitates the separation of photoinduced charge carriers and preserves the redox ability of W18O49/ZnO composite photocatalyst. The conversion of aniline reaches 99.1% after 5 h reaction under visible light irradiation at room temperature with an N-formylaniline selectivity of 100%. A possible photocatalytic reaction mechanism is proposed. This study paves a promising way for the design of highly efficient photocatalyst and the sustainable utilization of CO2.

Key words: Photocatalysis, CO2 valorization, N-formylation, Step-scheme heterojunction, Tungsten oxide, ZnO