In-situ growth of mesoporous Nb2O5 microspheres on g-C3N4 nanosheets for enhanced photocatalytic H2 evolution under visible light irradiation |
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| Authors: | Qun-Zeng Huang Ji-Chao Wang Pan-Pan Wang Hong-Chang Yao Zhong-Jun Li |
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| Affiliation: | 1. College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, PR China;2. College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, PR China;3. College of Chemistry and Chemical Engineering, Henan Institute of Science and, Technology, Xinxiang 453000, PR China |
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| Abstract: | 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 H2 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 μmol 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. |
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| Keywords: | Heterojunction Photocatalytic activity Hydrogen evolution |
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