Fabrication of Bi-Doped TiO2 Spheres with Ultrasonic Spray Pyrolysis and Investigation of Their Visible-Light Photocatalytic Properties

Bismuth-doped TiO2 submicrospheres were synthesized by ultrasonic spray pyrolysis. The prepared bismuth-doped titania was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-visible diffuse reflectance spectroscopy (UV-vis DRS), an...

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Bibliographic Details
Published in:Journal of nanotechnology 2012-01, Vol.2012 (2012), p.1-7
Main Authors: Lee, Frank S. C., Cheuk, Wahkit, Wu, Yifan, Ho, Wingkei, Huang, Jianhui
Format: Article
Language:English
Subjects:
Doping
Nanotechnology
Photocatalysis
Scanning electron microscopy
Spray pyrolysis
Titanium dioxide
X-ray photoelectron spectroscopy
X-rays
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Summary:Bismuth-doped TiO2 submicrospheres were synthesized by ultrasonic spray pyrolysis. The prepared bismuth-doped titania was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-visible diffuse reflectance spectroscopy (UV-vis DRS), and X-ray photoelectron spectroscopy (XPS). Aqueous photocatalytic activity was evaluated by the decomposition of methyl orange under visible-light irradiation. The results indicate that doping of bismuth remarkably affects the phase composition, crystal structure, and the photocatalytic activity. The sample with 2% Bi exhibits the optimum photocatalytic activity.
ISSN:1687-9503
1687-9511
DOI:10.1155/2012/214783