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Hydrothermally Induced Oxygen Doping of Graphitic Carbon Nitride with a Highly Ordered Architecture and Enhanced Photocatalytic Activity
Author(s) -
Wang Chao,
Fan Huiqing,
Ren Xiaohu,
Ma Jiangwei,
Fang Jiawen,
Wang Weijia
Publication year - 2018
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201702278
Subject(s) - photocatalysis , crystallinity , graphitic carbon nitride , materials science , nanosheet , chemical engineering , amorphous solid , doping , hydrothermal circulation , hydrothermal synthesis , carbon fibers , nanotechnology , catalysis , chemistry , composite material , organic chemistry , optoelectronics , composite number , engineering
As an amorphous or semicrystalline material, graphitic carbon nitride (g‐C 3 N 4 ) 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‐C 3 N 4 (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‐C 3 N 4 . 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.