Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 260, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2019.118181
Keywords
Monolayer; Functionalized carbon nitride; Photocatalytic hydrogen evolution; Low boiling point solvent
Funding
- National Natural Science Foundation of China (NSFC) [51472194, 51602237, 21975193]
- NSF of Hubei Province [2016CFA078]
- Fundamental Research Funds for the Central Universities [WUT:2017 IVA 039]
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Graphite carbon nitride (g-C3N4) is a promising photocatalyst, but its efficiency for photocatalytic hydrogen (H-2) evolution is still limited owing to its spatial charge separation. Herein, a functionalized monolayer carbon nitride photocatalyst with carbon vacancies and rich amino groups was synthesized via facile thermal induced exfoliation and polycondensation assisted by low boiling point of solvents. Experiments and calculations unveil that introducing carbon vacancies and rich amino groups into monolayer CN-acetone narrowed diffusion distance of photogenerated carriers and effectively enhanced their separation. Therefore, CN-acetone exhibited an outstanding photocatalytic H-2 evolution performance with a rate of 29.33 mmol h(-1) g(-1) (AQY = 26.2%), a 16-fold higher than that of pristine g-C3N4 under 420 nm light irradiation. The present work opens a new window for fabricating carbon nitride photocatalysts with high performance for photocatalytic H-2 evolution.
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