期刊
ACS NANO
卷 12, 期 6, 页码 5221-5227出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.7b08100
关键词
defect-rich amorphous carbon nitride; size-reduced urea; antisolvent growth; photocatalysis; visible-light hydrogen evolution
类别
资金
- National Key R&D Program of China [2017YFB1104300, 2016YFA0200200]
- NSFC [51673026, 21575014, 21674056]
- Beijing Natural Science Foundation [2152028, 2184122]
- Beijing Municipal Science and Technology Commission [Z161100002116022]
- 111 Project [807012]
- Fundamental Research Funds for the Central Universities [3190012331709]
- Beijing Institute of Technology Research Fund Program
Photocatalytic water splitting for hydrogen evolution by utilizing solar energy has a great significance for high-density solar energy storage and environmental sustainability. Here, a defect-rich amorphous carbon nitride (DACN) photocatalyst has been synthesized by simply direct calcination of the rationally size-reduced urea crystals. The introduction of nitrogen vacancies combined with disordered structure cause a broad visible-light-reponsive range, countless lateral edge/exposed surface bonding sites, and quenched radiative recombination, suggesting that this DACN enhances photocatalytic activity for hydrogen production. A record high hydrogen evolution rate of 37,680 mu mol h(-1) g(-1) under visible-light irradiation and an extraordinary apparent quantum efficiency of 34.4% at 400 nm were achieved, higher than most of the existing graphitic carbon nitride-based photocatalysts.
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