J. Mater. Sci. Technol. ›› 2023, Vol. 136: 169-179.DOI: 10.1016/j.jmst.2022.07.021

• Research Article • Previous Articles     Next Articles

MnWO4 nanorods embedded into amorphous MoSx microsheets in 2D/1D MoSx/MnWO4 S-scheme heterojunction for visible-light photocatalytic water oxidation

Hongru Zhoua, Jun Kea,*, Desheng Xua, Jie Liub,*   

  1. aSchool of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430205, China;
    bSchool of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, China
  • Received:2022-05-21 Revised:2022-07-08 Accepted:2022-07-20 Published:2023-02-10 Online:2022-08-18
  • Contact: * E-mail addresses: jke@wit.edu.cn (J. Ke), liujiedut@hotmail.com (J. Liu).

Abstract: In this work, a novel amorphous molybdenum disulfide/manganese tungstate (MoSx/MnWO4) hybrid in S-scheme heterojunction was designed and synthesized for photocatalytic water splitting to oxygen generation under visible light. In the hybrids, a strong chemical interlayer between amorphous MoSx microsheets and MnWO4 nanorods was created by partial substitution of Mo for W, which increases charge transportation efficiency by reducing charge transfer barrier, verified by the computational density functional theory (DFT) and photoelectrochemical tests. A 0.5 wt% MoSx/MnWO4 system (2D/1D) displayed a remarkable enhancement in photocatalytic activity of O2 evolution, up to 267.8 µmol g-1 under visible light illumination (> 420 nm). The formed S-scheme heterojunction structure efficiently promotes the utilization of solar light and separation efficiency of photo-generated charge carriers, leading to the improvement of photocatalytic water oxidation performance.

Key words: Photocatalytic water oxidation, Water splitting, Heterojunction, Interface engineering, Density functional theory