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TiO2 supported on SiO2 photocatalysts prepared using ultrasonic-assisted sol-gel method

Authors
  • Yang, X.
  • Liu, C.
  • Liu, Y.
  • Li, X.
  • Xu, Y.
Type
Published Article
Journal
Materials Science-Poland
Publisher
Versita
Publication Date
Sep 01, 2011
Volume
29
Issue
3
Pages
189–194
Identifiers
DOI: 10.2478/s13536-011-0030-8
Source
De Gruyter
Keywords
License
Green

Abstract

TiO2-SiO2 (TiO2 supported on SiO2) photocatalysts were prepared using an ultrasonic-assisted sol-gel method. These photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR) and photoluminescence spectra (PL). Their photocatalytic activities were investigated by the method of methyl orange oxidation. It was found that the photocatalytic activity of TiO2-SiO2 was optimal when the molar ratio of hexadecyl trimethyl ammonium bromide to titanium butoxide was 1:10. The average crystallite size of TiO2-SiO2 was smaller than that prepared by the stirring method. Furthermore, for pure anatase phase samples, it was shown that the lower the photoluminescence intensity, the higher the photocatalytic activity.

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