Chinese Journal of Catalysis ›› 2026, Vol. 84: 261-273.DOI: 10.1016/S1872-2067(26)65018-8

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In2S3/HOF S-scheme heterojunction for enhanced photocatalytic H2O2 production

Yong Zhanga, Wenjun Zhua(), Yanyan Zhaob, Shumin Zhangc   

  1. a School of Advanced Materials and Green Chemical Engineering, Hubei Provincial Engineering Research Center for Chemical Additives of Polymeric Materials, Hubei polytechnic University, Huangshi 435003, Hubei, China
    b College of Biology Pharmacy and Food Engineering, Shangluo University, Shangluo 726000, Shaanxi, China
    c Hunan Key Laboratory of Applied Environmental Photocatalysis, Changsha University, Changsha 410022, Hunan, China
  • Received:2026-01-15 Accepted:2026-02-02 Online:2026-05-18 Published:2026-04-16
  • Contact: *E-mail: wjzhu2000@163.com (W. Zhu).
  • Supported by:
    National Natural Science Foundation of China(22378103);National Natural Science Foundation of China(22409128);National Natural Science Foundation of China(22508019);Research Foundation Bureau of Hunan Province(24B0787);Hubei Provincial Natural Science Foundation Innovation and Development Joint Fund Key Project of Huangshi(2025AFD004)

Abstract:

As an emerging crystalline porous material, hydrogen bonded organic frameworks (HOFs) have enormous potential in photocatalytic field. However, poor stability and rapid recombination of photogenerated charges hinder their practical application in photocatalytic H2O2 production. To address the above challenges, this work employs a wet chemical method to grow In2S3 nanosheets in situ on the surface of highly stable HOF nanorods (PFC-1), resulting in a novel inorganic/organic In2S3/PFC-1 (IP) S-scheme heterojunction. The optimal IP composite achieves a significantly improved photocatalytic H2O2 evolution rate of 3.78 mmol g‒1 h‒1, which is 2.9- and 3.7-fold than that of In2S3 and PFC-1, respectively. The elevated visible-light absorption, abundant active sites, and effective charge separation of IP S-scheme heterojunction result in the improvement in photocatalytic performance. Additionally, photocatalytic H2O2 production of IP goes through a two-electron O2 reduction reaction pathway. This work offers a novel strategy for the fabrication of efficient HOF-based S-scheme heterostructures and their application in photocatalytic field.

Key words: Hydrogen-bonded organic frameworks, In2S3, S-scheme photocatalyst, O2 reduction, Photocatalytic H2O2 production