Journal
CHEMICAL ENGINEERING JOURNAL
Volume 211, Issue -, Pages 161-167Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2012.09.084
Keywords
alpha-/gamma-Bi2O3 homojunction; Synergetic; Photocatalytic
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Funding
- National Basic Research Program of China [2013CB933203, 2010CB933503]
- National Natural Science Foundation of China [50972155]
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A alpha-/gamma-Bi2O3 composite has been successfully prepared via a hydrothermal method. The as-prepared nanocrystals are characterized by the X-ray diffraction, Fourier transformation infrared spectrum, Scanning electron microscopy, Transmission electron microscopy, and high-resolution transmission electron microscopy examination. The homojunction between the alpha-Bi2O3 and gamma-Bi2O3 is confirmed by the diffuse reflectance spectra and impedance spectrum. The photocatalytic activities of the samples were evaluated by the degradation of Rhodamine B as a model pollutant. The composite exhibited higher photocatalytic activity than bare alpha-Bi2O3 or gamma-Bi2O3 in the degradation of RhB. The enhanced photocatalytic activity is attributed to the synergetic effect of the homojunction. (C) 2012 Elsevier B.V. All rights reserved.
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