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  • van der Waals type II carbon nitride homojunctions for visible light photocatalytic hydrogen evolution

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    Accepted Manuscript (AM)
    Author(s)
    Li, Xiaojie
    Zhang, Panpan
    Zhang, Huayang
    Tian, Wenjie
    Yang, Yangyang
    Hu, Kunsheng
    Chen, Dechao
    Li, Qin
    Duan, Xiaoguang
    Sun, Hongqi
    Wang, Shaobin
    Griffith University Author(s)
    Li, Qin
    Year published
    2021
    Metadata
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    Abstract
    Photocatalytic hydrogen evolution reaction (PC-HER) provides a solution to energy crisis and environmental pollution. Herein, different graphitic carbon nitride (g-C3N4)-based van der Waals (vdW) type II homojunctions have been fabricated and g-C3N4/K-doped g-C3N4 nanosheets have an outstanding PC-HER rate of 1,243 µmol-h−1·g−1 under visible light, higher than that of bulk g-C3N4, doped g-C3N4 nanosheets, and mixed nanosheets. The enhanced PC-HER performance can be ascribed to the cooperative effects of the shortened bandgap, enlarged specific surface area, matched type II energy band structure, “face to face” vdW charge ...
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    Photocatalytic hydrogen evolution reaction (PC-HER) provides a solution to energy crisis and environmental pollution. Herein, different graphitic carbon nitride (g-C3N4)-based van der Waals (vdW) type II homojunctions have been fabricated and g-C3N4/K-doped g-C3N4 nanosheets have an outstanding PC-HER rate of 1,243 µmol-h−1·g−1 under visible light, higher than that of bulk g-C3N4, doped g-C3N4 nanosheets, and mixed nanosheets. The enhanced PC-HER performance can be ascribed to the cooperative effects of the shortened bandgap, enlarged specific surface area, matched type II energy band structure, “face to face” vdW charge interaction, and peculiarly partite positions of the conduction and valence bands in different layers. Besides, the type II junctions were found superior to binary type II junction. This study highlights the synergistic effect of different strategies in improving the PC-HER capacities of g-C3N4, especially the application of particular vdW junctions, and provides new insights to the structures and mechanism.
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    Journal Title
    Nano Research
    DOI
    https://doi.org/10.1007/s12274-021-3744-x
    Copyright Statement
    © 2021 Tsinghua University Press, co-published with Springer-Verlag GmbHs. This is an electronic version of an article published in Nano Research, 2021. Nano Research is available online at: http://link.springer.com// with the open URL of your article.
    Note
    This publication has been entered as an advanced online version in Griffith Research Online.
    Subject
    Environmental management
    Environmental engineering
    Science & Technology
    Physical Sciences
    Chemistry, Physical
    Nanoscience & Nanotechnology
    Publication URI
    http://hdl.handle.net/10072/407131
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    • Journal articles

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