期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 217, 期 -, 页码 169-180出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2017.05.034
关键词
g-C3N4; ZnO; Core-shell structure; Synergistic effect; Photoelectrocatalysis
资金
- Natural Science Foundation of Liaoning [2015020577]
- Foundation of Anshan Municipal Division of Science Technology [20140556]
- Talents Foundation of University of Science and Technology Liaoning [2015RC10]
- Scientific Research Foundation of the Educational Department of Liaoning Province [L2013122]
- Chinese National Science Foundation [201437003, 21621003]
- National Basic Research Program of China [2013CB632403]
- Collaborative Innovation Center for Regional Environmental Quality
In this work, core-shell g-C3N4@ZnO photocatalysts were facilely synthesized via a reflux method applying the industrial grade ZnO nanoparticles and g-C3N4 nanosheets as the starting materials. The thickness of the g-C3N4 shell was gradually increased with the increasing proportion of g-C3N4 and the average thickness of the coating g-C3N4 is 1.89 nm and 3.21 nm for a weight ratio of 15% and 20% (g-C3N4/ZnO) g-C3N4@ZnO composites, respectively. By using g-C3N4 ZnO composites as photoanodes for the first time, 15% g-C3N4@ZnO photoanode exhibits the best PEC performance for the degradation of phenol under visible light irradiation with an anodic bias of 1.5 V vs. SCE and the rate constant is determined to be 1.216 h(-1), which is almost 2.1 times as high as that of 20% g-C3N4 ZnO photoanode. The enhancement of the visible light PEC degradation phenol is attributed to the double synergistic effects which combined of special core-shell nanostructures and electro-oxidation assisted photocatalysis. This work not only demonstrates core-shell g-C3N4@ZnO composites as a promising photoanode for the utilization of solar conversion, but also meets the requirement for the increasing demand of practical applications (C) 2017 Elsevier B.V. All rights reserved.
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