Synthesis, characterization and photocatalytic properties of nanosized Bi{sub 2}WO{sub 6}, PbWO{sub 4} and ZnWO{sub 4} catalysts
- Department of Chemistry, Tsinghua University, Beijing 100084 (China)
Nanosized Bi{sub 2}WO{sub 6}, PbWO{sub 4} and ZnWO{sub 4} photocatalysts were synthesized by a mild hydrothermal crystallization process. The physical and photophysical properties of the catalysts were characterized by X-ray diffractometry, Brunauer-Emmet-Teller surface area and porosity measurements, transmission electron microscopy, Raman spectra, and diffused reflectance spectroscopy. The rhodamine-B photodegradation in aqueous medium was employed as a probe reaction to test the photoactivities of the as-prepared samples under four irradiation wavelengths. Bi{sub 2}WO{sub 6} not only presented the photocatalytic activity in the wide spectral scope, including UV and visible light but also exhibited the strong photosensitized capability to transform RhB under visible light irradiation ({lambda} > 490 nm). ZnWO{sub 4} only displayed relatively high photoactivity under UV irradiation. However, PbWO{sub 4} showed poor photoactivity under any light irradiation. On the basis of the calculated density functional theory (DFT), the photocatalytic mechanisms were discussed.
- OSTI ID:
- 21000621
- Journal Information:
- Materials Research Bulletin, Vol. 42, Issue 4; Other Information: DOI: 10.1016/j.materresbull.2006.07.017; PII: S0025-5408(06)00314-X; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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