Hydrothermally Induced Oxygen Doping of Graphitic Carbon Nitride with a Highly Ordered Architecture and Enhanced Photocatalytic Activity

被引:111
作者
Wang, Chao [1 ]
Fan, Huiqing [1 ]
Ren, Xiaohu [1 ]
Ma, Jiangwei [1 ]
Fang, Jiawen [1 ]
Wang, Weijia [1 ]
机构
[1] Northwestern Polytech Univ, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China
关键词
doping; nitrides; ordered architectures; photocatalysis; porous structures; HYDROGEN EVOLUTION; H-2; EVOLUTION; G-C3N4; NANOSHEETS; ARTIFICIAL PHOTOSYNTHESIS; WATER; MECHANISM; CATALYSTS; INSIGHT; TIO2;
D O I
10.1002/cssc.201702278
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
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.
引用
收藏
页码:700 / 708
页数:9
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