4 research outputs found
Synthesis and Attestation of Titanium Dioxide Nanotubes Based Photocatalyst for Water and Air Purification out of Harmful Organic Impurities
In the present work we have synthesized nanotubular TiO2 film with a nonstoichiometric layer in the vicinity of titanium foil by anodization during 120 min. The catalytic activity of nanotubular titanium dioxide films formed during the oxidation of acetone to carbon dioxide under the action of visible light with a wavelength of 450 nm was found to be approximately 2 times higher compared to standard titanium dioxide (Degussa P25). Such a pronounced enhancement of activity may be attributed to a more efficient absorption of visible light by the films due to narrowing of the optical gap because of difference in the nonstoichiometry of titanium dioxide near the interface between nanotubular film and the titanium foil substrate.
Keywords: photocatalysis, nonstoichiometric titanium dioxide, purification of wate
Nonstoichiometric titanium dioxide nanotubes with enhanced catalytical activity under visible light
The catalytic activity of nanotubular titanium dioxide films formed during
the oxidation of acetone to carbon dioxide under the action of visible light
with a wavelength of 450 nm was found to be approximately 2 times higher
compared to standard titanium dioxide (Degussa P25). The nanotubular films were
grown by the anodization of titanium foil using an original technique. Diffuse
reflectance spectra of the films are attributed to enhanced activity in the
visible spectrum by the nonstoichiometry of titanium dioxide near the interface
between the nanotubular film and the titanium foil substrate.Comment: 10 pages, 9 figures, 1 Table, 43 reference