Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 2, Issue 13, Pages 4605-4612Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ta14811d
Keywords
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Funding
- National Natural Science Foundation of China [51102194, 51323011, 51121092]
- Nano Research Program of Suzhou City [ZXG2013003]
- Foundation for the Author of National Excellent Doctoral Dissertation of P.R. China [201335]
- Fundamental Research Funds for the Central Universities
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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.
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