Journal
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
Volume 71, Issue 4, Pages 579-582Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2009.12.041
Keywords
Inorganic compounds; Semiconductors; Nanostructures; Sol-gel growth; Microstructure
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Nanometer Bi2WO6 catalyst with visible-light responsive was prepared by a sol-gel method in the presence of EDTA. The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectrum, Fourier transform infrared (FTIR) spectrum, Brunauer-Emmet-Teller (BET). The UV-vis diffuse reflectance spectrum of the as-prepared sample shows a markedly blue-shift as compared to that of the sample obtained by a solid-state reaction. The as-prepared samples exhibited higher activities than that synthesized by the solid-state reaction for 4BS photodegradation under visible-light irradiation (lambda>400 nm) and the sample prepared at 450 degrees C exhibited the highest photocatalytic activity. (C) 2009 Elsevier Ltd. All rights reserved.
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