Bi{sub 2}WO{sub 6} photocatalytic films fabricated by layer-by-layer technique from Bi{sub 2}WO{sub 6} nanoplates and its spectral selectivity
- Department of Environmental Science and Engineering, Fudan University, Shanghai 200433 (China)
- Research Center of Nano-Science and Nano-Technology, Shanghai University, Shanghai 200444 (China)
Bi{sub 2}WO{sub 6} multilayer films have been fabricated successfully by a layer-by-layer (LbL) technique from Bi{sub 2}WO{sub 6} nanoplates, which show higher visible-light photoactivity ({lambda}>420 nm) than that of Bi{sub 2}WO{sub 6} nanoplate powders and P25 TiO{sub 2} films. The films were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and UV-visible absorption spectroscopy. Photocatalytic activities of the films were evaluated by the rhodamine B (RhB) decomposition under UV and visible-light irradiation. Thickness and photoactivity of the film can be modified easily by changing the deposition cycles. Bi{sub 2}WO{sub 6} films have the spectral selectivity of the photocatalytic degradation of RhB. Under the wavelength greater than 300 nm, the RhB molecules tend to be transformed to rhodamine over Bi{sub 2}WO{sub 6} films selectively. However, in the case of shorter wavelength ({lambda}=254 nm) light irradiation, the RhB molecules can be photodegraded completely. - Graphical abstract: Bi{sub 2}WO{sub 6} multilayer film fabricated by layer-by-layer technique.
- OSTI ID:
- 21015796
- Journal Information:
- Journal of Solid State Chemistry, Vol. 180, Issue 4; Other Information: DOI: 10.1016/j.jssc.2007.02.013; PII: S0022-4596(07)00087-4; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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