ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Nanocrystalline tungsten oxide doped titanium dioxide (WOx-TiO2) powders were prepared byTiCl4 hydrolysis and characterized by XRD, XPS, UV–Vis absorption spectra and TEM. Results showedthat WOx not only hindered the growth of TiO2 particles but also greatly increased the transformationtemperature (〉800 oC) from anatase to rutile during sintering; the dominant fraction of tungsten oxideswas non-stoichiometric tungsten oxide (WxOy) with Wn+ (4〈n〈6), which could easily substitute Ti4+ in thelattice of TiO2. The light absorption band of TiO2 changed from the near UV to the visible light range(2.68 eV in 1.0 %WOx-TiO2) because of the tungsten impurity energy level induced by WxTi1-xO2. Thephotocatalysis experiments demonstrated that the MB in aqueous solution was successfully degradedwithin 1h using WOx-TiO2 with an optimal WOx dosage of 1% under visible light irradiation
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.1979.pdf
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