期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 44, 期 36, 页码 19805-19815出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2019.05.135
关键词
Boron doped nanodiamond; Photocatalyst; Graphitic carbon nitride; Vsible light; Hydrogen evolution; Heterostructure
资金
- National Natural Science Foundation of China [51602288and U1604263]
- Natural Science Foundation of Henan Province [182300410281]
Boron doped nanodiamonds (BDND) were coupled with graphitic carbon nitride (g-C3N4) nanosheets to form a heterojunction via a facile pyrolysis approach. The BDND@g-C3N4 heterojunction exhibits enhanced visible-light absorbance, improved charge generation/separation efficiency and prolonged lifetime of carriers, which lead to the enhanced photocatalytic activities for the hydrogen evolution and organic pollution under visible-light irradiation. The optimal H-2 evolution rate and apparent quantum efficiency at 420 nm of the BDND@g-C3N4 heterojunction is 96.3 mu molh(-1) and 6.91%, which is about 5 and 2 times higher than those of pristine g-C3N4 nanosheets (18.2 mu mol h(-1) and 3.92%). No obvious decrease in hydrogen generation rate is observed in the recycling experiment due to the high photo-stabilization of the BDND@g-C3N4 composite. The degradation kinetic rate constant of organic pollution of the BDND@g-C3N4 structure is 0.1075 min(-1,) which is 3 times higher compared to pristine g-C3N4. This work may provide a promising route to construct highly efficient non-metal photocatalysts for hydrogen evolution and organic pollution degradation under visible light irradiation. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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