Journal
APPLIED SURFACE SCIENCE
Volume 284, Issue -, Pages 263-269Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2013.07.092
Keywords
BiOCl/m-BiVO4; Heterojunction; Photocatalysis; Semiconductor
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Funding
- Natural Science Foundation of China [51172086, 51272081]
- Natural Science Foundation of Anhui Province [1308085QB42]
- Natural Science Foundation of Educational Committee of Anhui Province [KJ2012Z356]
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Monoclinic BiVO4 (m-BiVO4) was modified with wide band-gap semiconductor BiOCl to construct novel BiOCl/m-BiVO4 heterojunctions. The as-synthesized samples were systematically characterized by X-ray diffraction (XRD), Fourier-transform infrared spectra (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive spectrum (EDS) and UV-vis diffuse reflectance spectra (DRS). The photocatalytic activities of BiOCl/m-BiVO4 were evaluated by measuring the degradation of methyl orange, rhodamine B and acid orange II under visible light (lambda > 420 nm). The results showed that BiOCl/m-BiVO4 had excellent photocatalytic performance compared with pure m-BiVO4, BiOCl, P25 and N-TiO2, especially 30% BiOCl/m-BiVO4 exhibited the highest photocatalytic activity. The heterojunctions between BiOCl and m-BiVO4 highly separated the photocarriers and yielded enhanced photocatalytic performance of BiOCl/m-BiVO4. (C) 2013 Elsevier B. V. All rights reserved.
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