期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 44, 期 5, 页码 2797-2810出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2018.12.036
关键词
2D-2D heterostructure; g-C3N4; UMOFNs; Photocatalyst; H-2 evolution
资金
- National Natural Science Foundation of China [51672081]
- support program for one hundred excellent talents of innovation in Hebei provincial universities (III) [SLRC2017049]
- Natural Science Foundation of Hebei Province, China [B2018209356]
- Youth Fund Project of Hebei Province Department of Education [QN2018056]
Here we report a 2D-2D heterostructure of g-C3N4/UMOFNs photocatalysts via mechanical grinding two kinds of two-dimensional nanosheets of g-C3N4 nanosheets and UMOFNs, which exhibits enhanced H2 evolution from water with simulated solar irradiation. g-C3N4 nanosheets are in close contact with UMOFNs, and there is a certain interaction between them, showing the effect of superimposition on the two-dimensional layer. The 2D-2D heterostructure offers a maximal photocatalytic hydrogen production activity of 1909.02 mu mol g(-1) h(-1) with 3 wt% of UMOFNs, which is 3-fold higher than that of g-C3N4 nanosheets (628.76 mu mol g(-1) h(-1)) and 15-flod higher than that of bulk g-C3N4 (124.30 mu mol g(-1)) The significant increasement of photocatalysis is due to 2D-2D heterostructure possessing a short charge transfer distance and large contact area between g-C3N4 and UMOFNs. The highly dispersed Ni-O, Co-O and pi-pi bonds in UMOFNs of 2D-2D structure also promote charge transfer and enhance the photocatalytic activity. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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