期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 57, 期 20, 页码 5765-5771出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201802014
关键词
carbon quantum dots; graphite carbon nitride; hydrogen production; photocatalysis; nanotubes
资金
- Fund for Outstanding Doctoral Dissertation of China University of Geosciences
- Chinese Scholarship Council
- Fundamental Research Funds for the Central Universities [CUG170638]
- Natural Science Foundation of Hubei Province of China [2017CFB190]
- Singapore Agency for Science, Technology and Research (A*STAR) Advanced Manufacturing and Engineering (AME) Individual Research Grants (IRG) [A1783c0007]
Graphite carbon nitride (g-C3N4) is a promising candidate for photocatalytic hydrogen production, but only shows moderate activity owing to sluggish photocarrier transfer and insufficient light absorption. Herein, carbon quantum dots (CQDs) implanted in the surface plane of g-C3N4 nanotubes were synthesized by thermal polymerization of freeze-dried urea and CQDs precursor. The CQD-implanted g-C3N4 nanotubes (CCTs) could simultaneously facilitate photoelectron transport and suppress charge recombination through their specially coupled heterogeneous interface. The electronic structure and morphology were optimized in the CCTs, contributing to greater visible light absorption and a weakened barrier of the photocarrier transfer. As a result, the CCTs exhibited efficient photocatalytic performance under light irradiation with a high H-2 production rate of 3538.3 mu mol g(-1) h(-1) and a notable quantum yield of 10.94% at 420 nm.
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