期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 27, 期 68, 页码 16879-16888出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.202102330
关键词
graphitic carbon nitride; hollow carbon nanospheres; hydrogen production; metal-free photocatalysts
资金
- National Natural Science Foundation of China [51888103, 51961130386]
- Royal Society-Newton Advanced Fellowship [NAF/R1/191163]
- China Fundamental Research Funds for the Central Universities
A novel hybrid photocatalyst composed of NCS and CN has been prepared, showing efficient photocatalytic performance by promoting photoelectron transfer through a special coupling interface, which significantly improves the photocatalytic efficiency.
A novel hybrid photocatalyst composed of hollow carbon nanospheres (NCS) and graphitic carbon nitride (CN) curly nanosheets has been prepared by the calcination of a NCS precursor and freeze-dried urea. The optimized photocatalyst exhibits an efficient photocatalytic performance under visible light irradiation with a highest H-2 generation rate of 3612.3 mu mol g(-1) h(-1), leading to an apparent quantum yield of 10.04 % at 420 nm, five times higher than the widely reported benchmark photocatalyst CN (2.01 % AQY). The materials characterization shows that NCS-modified CN curly nanosheets can promote photoelectron transfer and suppress charge recombination through their special coupling interface and NCS as an electron acceptor, which significantly improves the photocatalytic efficiency. Thus, this study provides an efficient strategy for the design of highly efficient photocatalyst, particularly suitable for a totally metal-free photocatalytic system.
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