Photochemical deposition of amorphous MoSx on one-dimensional NaNbO3-CdS heterojunction photocatalysts for highly efficient visible-light-driven hydrogen evolution

Jiawei Zhu; Jingjing Xu; Xiaoyu Du; Qiuhong Li; Yihang Fu; Mindong Chen

doi:10.1039/d0dt01290d

Photochemical deposition of amorphous MoS_x on one-dimensional NaNbO₃-CdS heterojunction photocatalysts for highly efficient visible-light-driven hydrogen evolution

Dalton Trans. 2020 Jul 7;49(26):8891-8900. doi: 10.1039/d0dt01290d.

Authors

Jiawei Zhu¹, Jingjing Xu, Xiaoyu Du, Qiuhong Li, Yihang Fu, Mindong Chen

Affiliation

¹ Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Engineering Technology Research Center of Environmental Cleaning Materials, Nanjing University of Information Science and Technology, Nanjing, 210044, China. xujj@seu.edu.cn xujj@nuist.edu.cn.

PMID: 32555860
DOI: 10.1039/d0dt01290d

Abstract

A novel ternary MoSx-CdS-NaNbO3 (MoSx-CN) photocatalyst was successfully fabricated through a two-step method (hydrothermal synthesis and photo-deposition step). The results demonstrated that CdS nanoparticles and amorphous MoSx uniformly dispersed on one-dimensional (1D) NaNbO3 nanowires, thus forming multi-junctions (CdS-NaNbO3, CdS-MoSx and NaNbO3-MoSx) that could increase the migration efficiency of photo-excited charge carriers. In addition, an abundance of unsaturated sulfur atoms in MoSx led to a strong attraction to H+, thus providing active sites for water splitting. Consequently, the optimized composite sample (MoSx-CN-100) exhibited a hydrogen (H2) evolution efficiency of 2.386 mmol g-1 h-1, which was about 125.58 and 11.93 times that of NaNbO3 and CdS, respectively. Moreover, the ternary photocatalyst also exhibited excellent stability in the long-term hydrogen production process compared with the binary and single samples. Our work provided new insight into the rational design of multi-heterojunction photocatalysts with high efficiency for H2 evolution under visible light irradiation.