G-C3N4 Nanosheets Coupled with TiO2 Nanosheets as 2D/2D Heterojunction Photocatalysts Toward High Photocatalytic Activity for Hydrogen Production

TiO 2 /g-C 3 N 4 2D/2D heterojunction nanocomposites were successfully synthesized through a facile self-assembly method. The structure characterization results shows good interaction between TiO 2 nanosheets and g-C 3 N 4 nanosheets. The photocatalytic activity of TiO 2 /g-C 3 N 4 samples were meas...

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Bibliographic Details
Published in:Catalysis letters 2019-10, Vol.149 (10), p.2930-2939
Main Authors: Yang, Yuhao, Li, Xiaolong, Lu, Chan, Huang, Wenhuan
Format: Article
Language:English
Subjects:
Carbon nitride
Catalysis
Catalytic activity
Charge efficiency
Charge transfer
Chemistry
Chemistry and Materials Science
Heterojunctions
Hydrogen production
Industrial Chemistry/Chemical Engineering
Light irradiation
Nanocomposites
Nanosheets
Organometallic Chemistry
Photocatalysis
Physical Chemistry
Self-assembly
Structural analysis
Titanium dioxide
Water splitting
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Summary:TiO 2 /g-C 3 N 4 2D/2D heterojunction nanocomposites were successfully synthesized through a facile self-assembly method. The structure characterization results shows good interaction between TiO 2 nanosheets and g-C 3 N 4 nanosheets. The photocatalytic activity of TiO 2 /g-C 3 N 4 samples were measured by hydrogen production in water splitting under visible light irradiation, which was found that the composites enhance the photocatalytic activity clearly compared to pure g-C 3 N 4 and TiO 2 nanosheets. The results could attribute to the formation of 2D heterojunction because of the stimulative charge transfer, promotional separation efficiency of photoexcited electron and hole and the suitable band positions. Besides, the samples exhibited substantial stability under visible light irradiation by the recycling experiments. The feasible photocatalytic mechanism was minutely discussed, which could explain the enhanced photocatalytic activity. Graphical Abstract
ISSN:1011-372X
1572-879X
DOI:10.1007/s10562-019-02805-8