Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/15105
Title: Engineering nanostructured Bi2WO6-TiO2 toward effective utilization of natural light in photocatalysis
Authors: Zhang, Y
Fei, L
Jiang, X
Pan, C
Wang, Y 
Issue Date: 2011
Publisher: Wiley-Blackwell
Source: Journal of the American Ceramic Society, 2011, v. 94, no. 12, p. 4157-4161 How to cite?
Journal: Journal of the American Ceramic Society 
Abstract: Being expected as one of the most promising solutions in water and air purification as photocatalyst, TiO2 is attracting intensive and extensive research interests globally despite its wide band gap (∼3.2 eV for anatase structure) which limits it only to be activated under UV irradiation. In pursuit of extending the active region of TiO2 toward visible light, considerable attention was devoted to develop TiO2-based photocatalyst. We report herein, for the first time, novel "bud-on- branch" Bi2WO6-TiO2 nanofibers fabricated via a facile and large-scale electrospinning technique from a biphased precursor. Formed by surface-decorating continuous TiO2 nanofibers (mixed anatase-rutile system with an average diameter of about 100 nm) with ∼13 nm well-crystallized Bi2WO6 nanoparticles, the as-synthesized Bi2WO6-TiO2 nanofibers achieved an evidently increased specific surface area. Furthermore, corresponding photocatalytic experiments revealed that the optimal photodegradation rate from our designed heterostructure was as high as three times to that of pure TiO 2 nanofibers; this increase in optimal photodegradation rate is attributed to the relatively well-matched energy band between TiO2 and Bi2WO6 and hence an excellent separation efficiency of photogenerated electron-hole pairs in both ultraviolet and visible light regions, suggesting that the designed heterostructures can give better rise to practise photocatalysis under natural light.
URI: http://hdl.handle.net/10397/15105
ISSN: 0002-7820
EISSN: 1551-2916
DOI: 10.1111/j.1551-2916.2011.04905.x
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