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Research Article | Open Access

Construction and performance of CdS/MoO2@Mo2C-MXene photocatalyst for H2 production

Sen JINHuijuan JINGLibo WANGQianku HUAiguo ZHOU( )
School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China
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Abstract

Nowadays, photocatalytic technologies are regarded as promising strategies to solve energy problems, and various photocatalysts have been synthesized and explored. In this paper, a novel CdS/MoO2@Mo2C-MXene photocatalyst for H2 production was constructed by a two-step hydrothermal method, where MoO2@Mo2C-MXene acted as a binary co-catalyst. In the first hydrothermal step, MoO2 crystals with an egged shape grew on the surface of two-dimensional (2D) Mo2C MXene via an oxidation process in HCl aqueous solution. In the second hydrothermal step, CdS nanorods were uniformly assembled on the surface of MoO2@Mo2C-MXene in ethylenediamine with an inorganic cadmium source and organic sulfur source. The CdS/MoO2@Mo2C-MXene composite with MoO2@Mo2C-MXene of 5 wt% exhibits an ultrahigh visible-light photocatalytic H2 production activity of 22,672 μmol/(g·h), which is ~21% higher than that of CdS/Mo2C-MXene. In the CdS/MoO2@Mo2C-MXene composite, the MoO2 with metallic nature separates CdS and Mo2C MXene, which acts as an electron-transport bridge between CdS and Mo2C MXene to accelerate the photoinduced electron transferring. Moreover, the energy band structure of CdS was changed by MoO2@Mo2C-MXene to suppress the recombination of photogenerated carriers. This novel compound delivers upgraded photocatalytic H2 evolution performance and a new pathway of preparing the low-cost photocatalyst to solve energy problems in the future.

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Journal of Advanced Ceramics
Pages 1431-1444
Cite this article:
JIN S, JING H, WANG L, et al. Construction and performance of CdS/MoO2@Mo2C-MXene photocatalyst for H2 production. Journal of Advanced Ceramics, 2022, 11(9): 1431-1444. https://doi.org/10.1007/s40145-022-0621-3

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Received: 20 April 2022
Revised: 12 June 2022
Accepted: 15 June 2022
Published: 04 August 2022
© The Author(s) 2022.

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