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Issue 32, 2017
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Enhanced visible-light photocatalytic H2-generation activity of carbon/g-C3N4 nanocomposites prepared by two-step thermal treatment

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Abstract

Photocatalytic hydrogen (H2) production from water by using solar energy and a photocatalyst is a green and sustainable route to tackle the energy issues. Herein, carbon/g-C3N4 nanocomposites were successfully synthesized via a two-step thermal treatment of urea and glucose with different ratios. As confirmed by X-ray photoelectron spectroscopy, a C–O–C bond was formed between carbon and g-C3N4, which leads to a strong interaction between carbon and g-C3N4. The prepared samples were evaluated for photocatalytic H2 generation under visible light irradiation. The experimental results indicate that the carbon/g-C3N4 nanocomposites show great photocatalytic H2 evolution activity, as high as 410.1 μmol g−1 h−1, which is 13.6-fold of pure g-C3N4. The enhanced photocatalytic performance not only originates from the enlarged surface area and extended visible light response range, but also from the effectively separated photo-generated charge carriers. This spatial charge separation greatly suppresses the recombination of photo-generated hole–electron pairs and facilitates efficient H2 production. This work provides a facile way to design highly efficient carbon nitride-based photocatalysts for potential application in photocatalytic reaction by using solar energy.

Graphical abstract: Enhanced visible-light photocatalytic H2-generation activity of carbon/g-C3N4 nanocomposites prepared by two-step thermal treatment

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Publication details

The article was received on 20 Feb 2017, accepted on 24 Mar 2017 and first published on 28 Mar 2017


Article type: Paper
DOI: 10.1039/C7DT00629B
Citation: Dalton Trans., 2017,46, 10611-10619
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    Enhanced visible-light photocatalytic H2-generation activity of carbon/g-C3N4 nanocomposites prepared by two-step thermal treatment

    Q. Xu, C. Jiang, B. Cheng and J. Yu, Dalton Trans., 2017, 46, 10611
    DOI: 10.1039/C7DT00629B

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