期刊
CERAMICS INTERNATIONAL
卷 40, 期 5, 页码 6399-6404出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2013.12.049
关键词
BiVO4; Particles; Polyacrylamide gel route; Photocatalytic activity; Hydroxyl radicals
资金
- National Natural Science Foundation of China [51262018]
- Hongliu Outstanding Talents Foundation of Lanzhou University of Technology [J201205]
Sphere-like BiVO4 particles with average size ranging from 390 to 270 nm were prepared via a polyacrylamide gel route, where the particle size was tailored by using different chelating agents. The bandgap energy of the samples is measured to be 2.49-2.51 eV by ultraviolet visible diffuse reflectance spectroscopy. The photocatalytic activity of the samples was evaluated by the degradation of methylene blue under irradiation of simulated sunlight, revealing that they exhibit a good photocatalytic activity. Hydroxyl radicals were detected by the photoluminescence technique using terephthalic acid as a probe molecule and are found to be produced over the irradiated BiVO4 particles. This indicates that hydroxyl radicals are likely to be the primary active species responsible for the dye degradation. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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