Nanostructured Photocatalysts with Enhanced Visible-Light Activity by a Low-Temperature Sol-Gel Process

Visible‐light active titanium dioxide catalysts were obtained using a single chemical doping process. In contrast to reported doping approaches, a low‐temperature sol‐gel doping process was developed. The photocatalytic efficiency was evaluated through the degradation of methylene blue and methyl or...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2012-07, Vol.95 (7), p.2330-2338
Main Authors: Tung, Wing Sze, Daoud, Walid A.
Format: Article
Language:English
Subjects:
Catalysis
Catalysts
Diffraction
Doping
Fourier transforms
Magnesium
Nanostructured materials
Photocatalysis
Sol gel process
Temperature
Titanium catalysts
Titanium dioxide
Ultraviolet radiation
X-ray photoelectron spectroscopy
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Summary:Visible‐light active titanium dioxide catalysts were obtained using a single chemical doping process. In contrast to reported doping approaches, a low‐temperature sol‐gel doping process was developed. The photocatalytic efficiency was evaluated through the degradation of methylene blue and methyl orange under UV and visible light irradiation, wherein doped titanium dioxide catalysts outperformed Degussa P‐25. The structure of the synthesized catalysts was investigated using Fourier transformation infrared, X‐ray diffraction, transmission electron microscopy, and selected area electron diffraction. The elemental composition of the resulting catalysts was characterized by X‐ray photoelectron spectroscopy. The optical absorption of the catalysts is also discussed.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1551-2916.2012.05233.x