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Tuning size of MoS2 in MoS2/graphene oxide heterostructures for enhanced photocatalytic hydrogen evolution

  • Energy materials
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Abstract

Nano-sized materials have attracted tremendous attentions because of their promising practical applications and theoretical values. The nano-sized materials are able to not only enhance the intrinsic properties of their bulk counterparts but also give birth to new promising properties. Herein, heterojunctions consisted of graphene oxide (GO) and three different MoS2 nanostructures, including nanoflowers, nanoparticles, and quantum dots, were constructed and used as photocatalysts in water splitting. The electrochemical behavior and photocatalytic performance of MoS2/GO composites were found closely related to the particle size and morphology of MoS2. Compared to bulk MoS2/GO photocatalyst, nano-sized MoS2/GO heterostructures exhibited obviously enhanced performance in photocatalytic hydrogen generation. Benefitting from the surface effect and the quantum confinement in MoS2 quantum dots, MoS2 quantum dots/GO displayed the highest photocatalytic activities. This study indicates that the decrease in the dimension of MoS2 can effectively increase the photocatalytic hydrogen evolution performance of MoS2/GO heterostructures, and thus suggests preferred strategy to design other HER photocatalysts based on MoS2.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Nos. 61376066, 51702328, and 21401203), CAS “Light of West China” Program, and Natural Science Foundation of Shandong Province, China (Grant No. ZR2017BD002).

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Authors and Affiliations

  1. Laboratory of Clean Energy Chemistry and Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, 18 Tianshui Middle Road, Lanzhou, 730000, People’s Republic of China

    Min Wang, Xiuxun Han, Yun Zhao & Jiajia Li

  2. University of Chinese Academy of Sciences, 19 (Jia) Yuquan Road, Beijing, 100039, People’s Republic of China

    Min Wang, Yun Zhao & Jiajia Li

  3. Marine Ecology Center, The First Institute of Oceanography, State Oceanic Administration, 6 Xianxialing Road, Qingdao, 266061, People’s Republic of China

    Peng Ju

  4. Henan University, 85 Minglun Road, Kaifeng, 410200, People’s Republic of China

    Zhaomin Hao

Authors
  1. Min Wang
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  2. Xiuxun Han
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  3. Yun Zhao
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  4. Jiajia Li
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  5. Peng Ju
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  6. Zhaomin Hao
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Corresponding authors

Correspondence to Xiuxun Han or Peng Ju.

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Cyclic voltammograms of the obtained MoS2/GO heterostructures (DOCX 122 kb)

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Wang, M., Han, X., Zhao, Y. et al. Tuning size of MoS2 in MoS2/graphene oxide heterostructures for enhanced photocatalytic hydrogen evolution. J Mater Sci 53, 3603–3612 (2018). https://doi.org/10.1007/s10853-017-1745-7

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  • DOI: https://doi.org/10.1007/s10853-017-1745-7

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