Journal
MATERIALS LETTERS
Volume 181, Issue -, Pages 86-91Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2016.06.024
Keywords
CoFe2O4/BiVO4; Hydrothermal; Photocatalytic activity; Wastewater treatment; Visible light; Methylene blue
Funding
- Thailand Research Fund (TRF)
- National Research University (NRU) Project under the Thailand's Office of the Higher Education Commission (CHE), Ministry of Education
- Commission on Higher Education (CHE) Grant [IRG5780013]
- Materials Science Research Center, Department of Chemistry, Faculty of Science, Chiang Mai University
- Materials Science Research Center, Department of Physics and Materials Science, Faculty of Science, Chiang Mai University
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The novel CoFe2O4/BiVO4 nanocomposites were firstly synthesized by a facile hydrothermal method. The photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET)-specific surface area; UV-vis diffuse reflectance spectrophotometer (UV-vis DRS), and X-ray photoelectron spectroscopy (XPS). The photocatalytic activities of all samples were evaluated based on the photocatalytic degradation of methylene blue (MB) under visible light irradiation. The results indicated that the photocatalytic activity of the CoFe2O4:BiVO4 nanocomposite with the mole ratio of 0.2:0.8 was higher than that of pure CoFe2O4 and pure BiVO4. The enhanced photocatalytic activity could be attributed to the formation of a composite, which suppressed the recombination of photogenerated electron-hole pairs. The formation of hydroxyl radicals (OH center dot) was found as the oxidizing reactive species to cause the degradation of the MB. Based on the results, a reasonable mechanism of photocatalysis on CoFe2O4/BiVO4 nanocomposite under visible light was proposed. (C) 2016 Elsevier B.V. All rights reserved.
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