Journal
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
Volume 178, Issue 1, Pages 45-52Publisher
ELSEVIER
DOI: 10.1016/j.mseb.2012.10.011
Keywords
Photocatalytic; Rhodamine B; Co3O4/Ag3VO4; Visible light irradiation
Funding
- National Natural Science Foundation of China [21003109, 21003108]
- Applied Research Foundation of Public Welfare Technologies of Zhejiang Province [2012C37057]
- program for Zhejiang Leading Team of Science and Technology Innovation [2009R50020]
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Co3O4/Ag3VO4 composite photocatalysts were synthesized by the wetness impregnation method and characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), energy-dispersive Xray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS) and diffuse reflectance spectroscopy (DRS). The photoactivity testing result shows that the Co3O4/Ag3VO4 composite exhibits enhanced photodegradation activity for Rhodamine B (RhB) under visible-light irradiation. The Co3O4 content and calcination temperature have a significant impact on the photocatalytic activities of the samples. The highest efficiency was observed on the 1.0 wt.% Co3O4/Ag3VO4 sample calcined at 653 K. Moreover, the photoelectrochemical performance with the method of transient photocurrent time was investigated. Based on the results of the characterizations, the mechanism of enhanced photocatalytic activity is discussed. (C) 2012 Elsevier B.V. All rights reserved.
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