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Issue 26, 2020
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Photochemical deposition of amorphous MoSx on one-dimensional NaNbO3–CdS heterojunction photocatalysts for highly efficient visible-light-driven hydrogen evolution

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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.

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

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Supplementary files

Article information


Submitted
08 Apr 2020
Accepted
29 May 2020
First published
30 May 2020

Dalton Trans., 2020,49, 8891-8900
Article type
Paper

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

J. Zhu, J. Xu, X. Du, Q. Li, Y. Fu and M. Chen, Dalton Trans., 2020, 49, 8891
DOI: 10.1039/D0DT01290D

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