期刊
LANGMUIR
卷 38, 期 4, 页码 1471-1478出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.1c02716
关键词
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资金
- Natural Science Foundation of China [51871160, 51671141, 51471115]
- New Materials R&D Center of Shanghang Country, Fujian Province
In this study, highly conjugated g-CN nanofoam was successfully synthesized through an iodide substitution technique. Experimental analysis and theoretical calculations demonstrated its high photocatalytic activity.
As a metal-free photocatalyst, graphitic carbon nitride (g-CN) shows great potential for photocatalytic water splitting, although its performance is significantly limited by structural defects due to incomplete polymerization. In the present work, we successfully synthesize highly conjugated g-CN nanofoam through an iodide substitution technique. The product possesses a high polymerization degree, low defect density, and large specific surface area; as a result, it achieves a hydrogen evolution rate of 9.06 mmol h(-1) g(-1) under visible light irradiation, with an apparent quantum efficiency (AQE) of 18.9% at 420 nm. Experimental analysis and theoretical calculations demonstrate that the recombination of photogenerated carriers at C-NHx defects was effectively depressed in the nanofoam, giving rise to the high photocatalytic activity.
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