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Issue 25, 2018
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Double defects modified carbon nitride nanosheets with enhanced photocatalytic hydrogen evolution

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Abstract

Graphitic carbon nitride (g-C3N4) is an actively investigated metal-free photocatalyst for solar energy conversion. However, primary g-C3N4 usually exhibits limited utilization of visible light and fast combination of photoexcited charge carriers, resulting in low photocatalytic H2 evolution activity. Defect-modified g-C3N4 shows much enhanced photocatalytic H2 evolution activity owing to extended light absorption as well as efficient charge separation and transfer. Here, the photocatalyst simultaneously containing nitrogen vacancies and O-doping is successfully developed by using a two-step post-synthetic strategy for photocatalytic H2 evolution, resulting in a greatly-boosted H2 evolution activity (1.69 × 103 μmol g−1 h−1) compared with that of pristine g-C3N4 (1.12 × 102 μmol g−1 h−1). It is believed that the newly developed double-defect strategy may open an avenue toward obtaining molecular level comprehension of the function of a catalyst in photocatalytic H2 evolution and can be extended to the modification of other semiconductors.

Graphical abstract: Double defects modified carbon nitride nanosheets with enhanced photocatalytic hydrogen evolution

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Publication details

The article was received on 28 Mar 2018, accepted on 30 May 2018 and first published on 30 May 2018


Article type: Paper
DOI: 10.1039/C8CP01986J
Citation: Phys. Chem. Chem. Phys., 2018,20, 17471-17476
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    Double defects modified carbon nitride nanosheets with enhanced photocatalytic hydrogen evolution

    G. Xu, J. Shen, S. Chen, Y. Gao, H. Zhang and J. Zhang, Phys. Chem. Chem. Phys., 2018, 20, 17471
    DOI: 10.1039/C8CP01986J

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