Fabrication of bi-doped TiO₂ spheres with ultrasonic spray pyrolysis and investigation of their visible-light photocatalytic properties

Jianhui HUANG, Wahkit CHEUK, Yifan WU, Frank S. C. LEE, Wing Kei HO

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Abstract

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), UVvisible 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. Copyright © 2012 Jianhui Huang et al.
Original languageEnglish
Article number214783
JournalJournal of Nanotechnology
Volume2012
DOIs
Publication statusPublished - 2012

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Bismuth
Spray pyrolysis
Ultrasonics
Fabrication
Phase composition
X ray photoelectron spectroscopy
Crystal structure
Doping (additives)
Irradiation
Spectroscopy
Transmission electron microscopy
Decomposition
X ray diffraction
Scanning electron microscopy

Bibliographical note

Huang, J., Cheuk, W., Wu, Y., Lee, F. S. C., Ho, W. (2012). Fabrication of bi-doped TiO₂ spheres with ultrasonic spray pyrolysis and investigation of their visible-light photocatalytic properties. Journal of Nanotechnology, 2012. Retrieved from: http://dx.doi.org/10.1155/2012/214783