Journal
CHEMSUSCHEM
Volume 12, Issue 18, Pages 4221-4228Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201901609
Keywords
carbon nitride; charge transfer; hydrogen evolution; photocatalysis; reaction mechanisms
Funding
- National Natural Science Foundation of China [21375116, 21506095]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Jiangsu Province research program on analytical methods and techniques on the shared platform of large-scale instruments and equipment [BZ 201409]
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It is of great significance to fabricate a full-spectrum-active photocatalysts for more efficient utilization of solar energy. An improved metal-to-ligand charge transfer (MLCT) mechanism is proposed for a photocatalyst based on graphitic carbon nitride (g-C3N4). UV/Vis spectroscopy indicates that the as-prepared photocatalyst absorbs light at lambda<1100 nm. The rather stable photocatalyst is found to be 26.1 times more active in photocatalytic hydrogen evolution (868.9 mu mol h(-1) g(-1)) than bulk g-C3N4 (B-CN) under visible light. The material exhibits high activity under near-infrared (NIR) irradiation (49.1 mu mol h(-1) g(-1)). The mechanism of photocatalytic activity and stability are investigated by both experiment and theory. This proposed mechanism may have great potential for engineering renewable photocatalysts in the future.
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