Journal
CHEMSUSCHEM
Volume 11, Issue 4, Pages 700-708Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201702278
Keywords
doping; nitrides; ordered architectures; photocatalysis; porous structures
Funding
- National Nature Science Foundation [51672220]
- 111 Program of MOE [B08040]
- National Defense Science Foundation [32102060303]
- Xi'an Science and Technology Foundation [CXY1706-5, 2017086CGRC049-XBGY005]
- Shaanxi Provincial Science Foundation [2017KW-018]
- Seed Foundation of Innovation and Creation for Graduate Students in Northwestern Polytechnical University [Z2018007]
- NPU Gaofeng Project of China [17GH020824]
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As an amorphous or semicrystalline material, graphitic carbon nitride (g-C3N4) displays poor photocatalytic activity owing to rapid recombination of the photogenerated charge carriers, which is mainly caused by a high density of defects in the graphitic structure. In this work, a porous O-doped g-C3N4 (P-CNO) nanosheet with a highly ordered architecture is fabricated by introducing a novel hydrothermal treatment to the precursor before the final thermal condensation. The photocatalytic hydrogen evolution rate (HER) and HER per surface area of P-CNO are 13.9 and 1.7 times higher than that of bulk g-C3N4. The improved photocatalytic activity is ascribed to a synergistic effect of O doping, a porous sheet-like morphology, and increased crystallinity. This work also provides a new approach for the synthesis of other polymer-based photocatalysts with high crystallinity and excellent performance.
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