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Issue 1, 2015
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Nitrogen-doped CeOx nanoparticles modified graphitic carbon nitride for enhanced photocatalytic hydrogen production

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Abstract

Nitrogen-doped CeOx nanoparticles (N-CeOx NPs) were directly formed on graphitic carbon nitride (g-C3N4) via a facile one-pot method by annealing a mixture of Ce(NO3)3 and melamine as CeOx and g-C3N4 precursors, respectively. Nitrogen was in situ doped into CeOx under NH3 atmosphere released by the decomposition of melamine during the annealing process. The physical and photophysical properties of N-CeOx NPs modified g-C3N4 photocatalysts were investigated to reveal the effects of N-CeOx NPs on the photocatalytic activities of g-C3N4. It was found that the one-pot annealing method was favorable for forming intimate interfacial contact between N-CeOx and g-C3N4. The visible light photocatalytic hydrogen production activity over g-C3N4 was enhanced by ca. 1.2 times with the N-CeOx NPs modification. The significant enhancement in photocatalytic performance for the N-CeOx/g-C3N4 heterojunction should be mainly because of the promoted charge transfer and charge separation between N-CeOx NPs and g-C3N4 resulting from the intimate interfacial contact and Type II band alignment. In addition, the improved visible light absorption of N-CeOx NPs induced by nitrogen doping could be another reason for the enhanced photocatalytic activity of the N-CeOx/g-C3N4 heterojunction.

Graphical abstract: Nitrogen-doped CeOx nanoparticles modified graphitic carbon nitride for enhanced photocatalytic hydrogen production

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Publication details

The article was received on 31 Aug 2014, accepted on 17 Sep 2014 and first published on 18 Sep 2014


Article type: Paper
DOI: 10.1039/C4GC01683A
Author version available: Download Author version (PDF)
Citation: Green Chem., 2015,17, 509-517
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    Nitrogen-doped CeOx nanoparticles modified graphitic carbon nitride for enhanced photocatalytic hydrogen production

    J. Chen, S. Shen, P. Wu and L. Guo, Green Chem., 2015, 17, 509
    DOI: 10.1039/C4GC01683A

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