Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 42, Issue 10, Pages 6683-6694Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2017.02.052
Keywords
Nb2O5; g-C3N4; Heterojunction; Photocatalytic activity; Hydrogen evolution
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Funding
- National Natural Science Foundation of China [21471133, 21541011]
- Foundation of Henan Educational Committee, China [14A150001]
- Key Science and Technology Program of Zhengzhou, China [141PQYJS562]
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Large-surface-area mesoporous Nb2O5 microspheres were successfully grown in-situ on the surface of g-C3N4 nanosheets via a facile solvothermal process with the aid of Pluronic P123 as a structure-directing agent. The resultant g-C3N4/Nb2O5 nanocomposites exhibited enhanced photocatalytic activity for H-2 evolution from water splitting under visible light irradiation as compared to pure g-C3N4. The optimal composite with 38.1 wt% Nb2O5 showed a hydrogen evolution rate of 1710.04 mu mol h(-1) g(-1), which is 4.7 times higher than that of pure g-C3N4. The enhanced photocatalytic activity could be attributed to the sufficient contact interface in the heterostructure and large specific surface area, which leads to effective charge separation between g-C3N4 and Nb2O5. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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