Chinese Journal of Catalysis ›› 2021, Vol. 42 ›› Issue (1): 87-96.DOI: 10.1016/S1872-2067(20)63595-1

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Construction of LSPR-enhanced 0D/2D CdS/MoO3-x S-scheme heterojunctions for visible-light-driven photocatalytic H2 evolution

Jinjun Penga, Jun Shenb, Xiaohui Yua, Hua Tanga,#, Zulfiqar a, Qinqin Liua,*   

  1. aSchool of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China
    bSchool of Pharmacy, Suzhou Vocational Health College, Suzhou 215009, Jiangsu, China
  • Received:2020-02-27 Accepted:2020-04-21 Online:2021-01-18 Published:2021-01-18
  • Contact: Hua Tang,Qinqin Liu
  • About author:#Tel: +86-13952874183; E-mail: huatang79@163.com
    *Tel: +86-13921581597; E-mail: qqliu@ujs.edu.cn;
    First author contact: These two authors contributed equally.
  • Supported by:
    National Natural Science Foundation of China(51672113);National Natural Science Foundation of China(21975110);National Natural Science Foundation of China(21972058);Taishan Youth Scholar Program of Shandong Province

Abstract:

Plasmonic nonmetal semiconductors with localized surface plasmon resonance (LSPR) effects possess extended light-response ranges and can act as highly efficient H2 generation photocatalysts. Herein, an LSPR-enhanced 0D/2D CdS/MoO3-x heterojunction has been synthesized by the growth of 0D CdS nanoparticles on 2D plasmonic MoO3-x elliptical nanosheets via a simple coprecipitation method. Taking advantage of the LSPR effect of the MoO3-x elliptical nanosheets, the light absorption of the CdS/MoO3-x heterojunction was extended from 600 nm to the near-infrared region (1400 nm). Furthermore, the introduction of 2D plasmonic MoO3-x elliptical nanosheets not only provided a platform for the growth of CdS nanoparticles, but also contributed to the construction of an LSPR-enhanced S-scheme structure due to the interface between the MoO3-x and CdS, accelerating the separation of light-induced electrons and holes. Therefore, the CdS/MoO3-x heterojunction exhibited higher photocatalytic H2 generation activity than pristine CdS under visible light irradiation, including under 420, 450, 550, and 650 nm monochromic light, as well as improved photo-corrosion performance.

Key words: CdS, MoO3-x, Photocatalytic H2 evolution, S-scheme, Localized surface plasmon resonance effect