期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 533, 期 -, 页码 251-258出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2018.08.071
关键词
2D/2D; BiVO4; g-C3N4; Heterostructure; Photocatalysis
资金
- Natural Science Foundation of China [21603024, 21577013, U1508205, 21373037]
- International S&T Cooperation Program of China [2016YFE010 9800]
- Liaoning Province Doctor Startup Fund [201601038]
- Fundamental Research Funds for the Central Universities [DUT16ZD224]
In this work, a two dimensional (2D)/2D BiVO4/g-C3N4 heterostructure with strong interfacial interaction was successfully constructed. The as-prepared BiVO4/g-C3N4 heterostructures exhibit distinctly enhanced visible light photocatalytic performance toward the degradation of Rodanmin B (RhB) and water splitting to oxygen (O-2) as compared to pristine g-C3N4 and BiVO4, which can be attributed to the strong interfacial interaction and abundant 2D coupling interfaces, facilitating efficient charge separation. Among the composites with various ratios, the BiVO4-10/g-C3N4 sample achieves the optimum photocatalytic activity for the degradation of RhB, and reached 15.8 and 4.3 times compared to pure g-C3N4 and BiVO4. Moreover, the corresponding composite reached a high O-2 -production rate of 0.97 mu mol h(-1) under visible light irradiation, which is 12.1 and 2.8 times higher than that of pure g-C3N4 and BiVO4, respectively. It was demonstrated that the efficiency of electron-hole separation has certain contribution to the photocatalytic performance over the BiVO4/g-C3N4 heterostructure. The present study suggests that the unique 2D/2D BiVO4/g-C3N4 hybrid nanosheets should be conducive to improve the photocatalytic performance of organic pollutant degradation and water splitting. (C) 2018 Elsevier Inc. All rights reserved.
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