Chinese Journal of Catalysis ›› 2022, Vol. 43 ›› Issue (7): 1851-1859.DOI: 10.1016/S1872-2067(21)63989-X

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Photocatalytic selective oxidation of aromatic alcohols coupled with hydrogen evolution over CdS/WO3 composites

Yu-Lan Wu, Ming-Yu Qi, Chang-Long Tan, Zi-Rong Tang(), Yi-Jun Xu()   

  1. College of Chemistry, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350116, Fujian, China
  • Received:2021-10-08 Accepted:2021-12-06 Online:2022-07-18 Published:2022-05-20
  • Contact: Zi-Rong Tang, Yi-Jun Xu
  • Supported by:
    Natural Science Foundation of China(22172030);Natural Science Foundation of China(22072023);Natural Science Foundation of China(21872029);Natural Science Foundation of China(U1463204);Program for National Science and Technology Innovation Leading Talents(00387072);1st Program of Fujian Province for Top Creative Young Talents, the Program for Leading Talents of Fujian Universities, the Award Program for Minjiang Scholar Professorship;Natural Science Foundation of Fujian Province(2017J07002);Natural Science Foundation of Fujian Province(2019J01631)

Abstract:

Simultaneously utilizing photogenerated electrons and holes to convert renewable biomass and its derivatives into corresponding value-added products and hydrogen (H2) is a promising strategy to deal with the energy and environmental crisis. Herein, we report a facile hydrothermal method to construct a direct Z-scheme CdS/WO3 binary composite for photocatalytic coupling redox reaction, simultaneously producing H2 and selectively converting aromatic alcohols into aromatic aldehydes in one pot. Compared with bare CdS and WO3, the CdS/WO3 binary composite exhibits significantly enhanced performance for this photocatalytic coupled redox reaction, which is ascribed to the extended light harvesting range, efficient charge carrier separation rate and optimized redox capability of CdS/WO3 composite. Furthermore, the feasibility of converting various aromatic alcohols to corresponding aldehydes coupled with H2 evolution on the CdS/WO3 photocatalyst is proved and a reasonable reaction mechanism is proposed. It is hoped that this work can provide a new insight into the construction of direct Z-scheme photocatalysts to effectively utilize the photogenerated electrons and holes for photocatalytic coupled redox reaction.

Key words: Photocatalyst, Aromatic alcohols, Z-scheme, Composite photocatalyst, Hydrogen evolution