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Synthesis and photocatalytic activity of nano V-doped TiO2 particles in MCM-41 under UV–visible irradiation

Published online by Cambridge University Press:  31 January 2011

Avesh K. Tyagi*
Affiliation:
Chemistry Division, Bhabha Atomic Research Center, Mumbai 400085, India
*
a)Address all correspondence to this author. e-mail: aktyagi@barc.gov.in
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Abstract

The vanadium (V)-doped titania (Ti0.95V0.05O2) was impregnated in the host matrix of the pre-synthesized siliceous mesoporous material MCM-41 in a single pot synthesis step, by the wet impregnation route. The samples were characterized by x-ray diffraction, transmission electron microscopy (TEM), N2 adsorption, diffuse reflectance ultraviolet–visible spectroscopy (DRUVS). As compared to Ti0.95V0.05O2, the DRUV spectra of the impregnated catalysts showed a blue shift; still the absorption lies in the visible region. Presence of nano-sized (∼2–12 nm) V-doped titania particles in V-TiO2/MCM-41 was revealed by TEM and the particle size was found to increase with the loading of the V-doped titania in the host matrix. All impregnated samples were found to be more active than either the bulk V-doped titania or titania for photocatalytic oxidation of ethylene in air at ambient conditions under both UV and visible irradiation.

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Copyright
Copyright © Materials Research Society 2010

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