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Issue 44, 2015
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Metal Ni-loaded g-C3N4 for enhanced photocatalytic H2 evolution activity: the change in surface band bending

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Abstract

A series of Ni@g-C3N4 composites were synthesized by a simple solvent thermal method using melamine and acetylacetone nickel as precursors. The results of X-ray diffraction, transmission electron microscopy and high resolution transmission electron microscopy indicate that Ni was successfully loaded on g-C3N4. And the Ni loaded greatly enhances the photocatalytic H2 evolution activity of g-C3N4 compared to the pure g-C3N4. In order to study the role of Ni, the surface photovoltage, the surface photocurrent and photoluminescence measurements were used to investigate the photogenerated charge properties of g-C3N4. What is more, Mott–Schottky plots and work function measurements confirmed the surface band bending change of g-C3N4 contacting with Ni. Those results demonstrate that Ni coating deepens surface band bending of g-C3N4, resulting in higher separation efficiency of photogenerated charge carriers, which is contributed to the enhanced photocatalytic H2 evolution activity.

Graphical abstract: Metal Ni-loaded g-C3N4 for enhanced photocatalytic H2 evolution activity: the change in surface band bending

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Publication details

The article was received on 29 Aug 2015, accepted on 14 Oct 2015 and first published on 14 Oct 2015


Article type: Paper
DOI: 10.1039/C5CP05158D
Citation: Phys. Chem. Chem. Phys., 2015,17, 29899-29905
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    Metal Ni-loaded g-C3N4 for enhanced photocatalytic H2 evolution activity: the change in surface band bending

    L. Bi, D. Xu, L. Zhang, Y. Lin, D. Wang and T. Xie, Phys. Chem. Chem. Phys., 2015, 17, 29899
    DOI: 10.1039/C5CP05158D

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