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Enhancing Visible‐Light Hydrogen Evolution Performance of Crystalline Carbon Nitride by Defect Engineering
Author(s) -
Ren Wei,
Cheng Jiajia,
Ou Honghui,
Huang Caijin,
Titirici MariaMagdalena,
Wang Xinchen
Publication year - 2019
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.201901011
Subject(s) - photocatalysis , crystallinity , carbon nitride , materials science , hydrogen production , semiconductor , visible spectrum , nitride , nanotechnology , carbon fibers , hydrogen , catalysis , chemical engineering , absorption (acoustics) , optoelectronics , chemistry , organic chemistry , composite material , layer (electronics) , composite number , engineering
Crystalline carbon nitride (CCN)‐based semiconductors have recently attracted widespread attention in solar energy conversion. However, further modifying the photocatalytic ability of CCN always results in a trade‐off between high crystallinity and good photocatalytic performance. Herein, a facile defect engineering strategy was demonstrated to modify the CCN photocatalysts. Results confirmed that the obtained D ‐CCN maintained the high crystallinity; additionally, the hydrogen production rate of D ‐CCN was approximately 8 times higher than that of CCN. Particularly, it could produce H 2 even if the incident light wavelength extended to 610 nm. The significantly improved photocatalytic activity could be ascribed to the introduction of defects into the CCN polymer network to form the midgap states, which significantly broadened the visible‐light absorption range and accelerated the charge separation for photoredox catalysis.