Chinese Journal of Catalysis ›› 2025, Vol. 69: 111-122.DOI: 10.1016/S1872-2067(24)60191-9

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Boosting H2O2 evolution of CdS via constructing a ternary photocatalyst with earth-abundant halloysite nanotubes and NiS co-catalyst

Hongfen Lia, Yihe Zhanga,*(), Jianming Lib,*(), Qing Liuc,d, Xiaojun Zhanga, Youpeng Zhanga, Hongwei Huanga,*()   

  1. aEngineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083, China
    bCollege of New Energy, Ningbo University of Technology, Ningbo 315211, Zhejiang, China
    cKey Laboratory of Ecological Environment and Information Atlas, Fujian Provincial University, Putian 351100, Fujian, China
    dFujian Provincial Key Laboratory of Ecology-Toxicological Effects and Control for Emerging Contaminants, College of Environmental and Biological Engineering, Putian University, Putian 351100, Fujian, China
  • Received:2024-08-21 Accepted:2024-10-24 Online:2025-02-18 Published:2025-02-10
  • Contact: E-mail: zyh@cugb.edu.cn (Y. Zhang), jmli@nbut.edu.cn (J. Li), hhw@cugb.edu.cn (H. Huang).
  • Supported by:
    National Natural Science Foundation of China(52072347);National Natural Science Foundation of China(52272244);National Natural Science Foundation of China(51972288);Fundamental Research Funds for the Central Universities(2652022202);Natural Science and Technology Foundation of Fujian Province(2020J05210);Open Funding of Key Laboratory of Ecological Environment and Information Atlas(ST22003);project of national local joint engineering laboratory to functional adsorption material technology for the environmental protection, Jiangsu(SDGC2302)

Abstract:

Hydrogen peroxide (H2O2), an environmentally friendly chemical with high value, is extensively used in industrial production and daily life. However, the traditional anthraquinone method for H2O2 production is associated with a highly energy-consuming and heavily polluting process. Solor-driven photocatalytic evolution of H2O2 is a promising, eco-friendly, and energy-efficient strategy that holds great potential to substitute the traditional approach. Here, a ternary photocatalyst, NiS/CdS/Halloysite nanotubes (NiS/CdS/HNTs) is designed and prepared with an earth-abundant clay mineral HNTs as the support and NiS as a co-catalyst. The pivotal roles of HNTs and NiS in the photocatalytic process are elucidated by experiments and theoretical calculations. HNTs serve as the carrier, which allows CdS to be uniformly dispersed onto its surface as small particles, increasing effective contact with H2O and O2 for H2O2 formation. Simultaneously, it resulted in the formation of a Schottky junction between NiS and CdS, which not only favors photogenerated charges separating efficiently but also provides a unidirectional path to transfer electrons. Consequently, the optimized NiS/CdS/HNTs composite demonstrates an H2O2 evolution rate of 380.5 μmol·g-1·h-1 without adding any sacrificial agent or extra O2, nearly 5.0 times that of pure CdS. This work suggests a feasible idea for designing and developing highly active and low-cost solar energy catalytic composite materials.

Key words: Photocatalytic H2O2 evolution, Ternary photocatalyst, NiS/CdS/HNTs, Carrier separation, Schottky junction