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Issue 13, 2014
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Spatial engineering of photo-active sites on g-C3N4 for efficient solar hydrogen generation

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Abstract

ZnFe2O4 modified g-C3N4 was successfully synthesized by a simple one-pot method. The visible-light-driven photocatalytic hydrogen production activity of g-C3N4 was significantly enhanced due to spatial engineering of the photo-active sites via ZnFe2O4 modification and Pt loading. It is proposed that ZnFe2O4 does not function as visible light sensitizer but as oxidation active sites. In the present ZnFe2O4/g-C3N4 photocatalysts, the photo-induced holes in g-C3N4 tend to transfer to ZnFe2O4 due to the straddling band structures (Type I band alignment), while the photo-induced electrons in g-C3N4 prefer to transfer to the loaded Pt cocatalysts, which can function as reduction active sites for hydrogen production. As a result, the photoinduced electrons and holes in g-C3N4 are efficiently separated by spatial engineering of the photo-active sites, and hence enhanced photocatalytic hydrogen generation activity is obtained.

Graphical abstract: Spatial engineering of photo-active sites on g-C3N4 for efficient solar hydrogen generation

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Supplementary files

Article information


Submitted
21 Nov 2013
Accepted
06 Jan 2014
First published
08 Jan 2014

J. Mater. Chem. A, 2014,2, 4605-4612
Article type
Paper

Spatial engineering of photo-active sites on g-C3N4 for efficient solar hydrogen generation

J. Chen, S. Shen, P. Guo, P. Wu and L. Guo, J. Mater. Chem. A, 2014, 2, 4605
DOI: 10.1039/C3TA14811D

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