Defective graphitic carbon nitride synthesized by controllable co-polymerization with enhanced visible light photocatalytic hydrogen evolution

Defects have a vital effect on the band structures and properties of semiconductor photocatalysts. Herein, we developed a one-step strategy to introduce defects in the framework of g-C 3 N 4 by controllable copolymerization of melamine with a series of partially reactive end capped monomers. The cap...

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Bibliographic Details
Published in:Catalysis science & technology 2017, Vol.7 (2), p.452-458
Main Authors: Zhang, Mei, Duan, Yanyan, Jia, Hanzhong, Wang, Fu, Wang, Lan, Su, Zhi, Wang, Chuanyi
Format: Article
Language:English
Subjects:
Capping
Conduction band
Copolymerization
Defects
Melamine
Photocatalysis
Semiconductors
Synthesis (chemistry)
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Summary:Defects have a vital effect on the band structures and properties of semiconductor photocatalysts. Herein, we developed a one-step strategy to introduce defects in the framework of g-C 3 N 4 by controllable copolymerization of melamine with a series of partially reactive end capped monomers. The capping molecules have great impacts on the properties of modified g-C 3 N 4 . The obtained defective g-C 3 N 4 exhibits an increased surface area, improved charge carrier separation efficiency, and a narrowed band gap with a negative shift of the conduction band. Particularly, defect-rich CN-DPT shows 10 times improvement of visible light activity for hydrogen production compared with pristine g-C 3 N 4 .
ISSN:2044-4753
2044-4761
DOI:10.1039/C6CY02318E