Disordered mesoporous V/TiO2 system for ambient oxidation of sulfides to sulfoxides

Authors: Sanjay Singh Negi, Kumarsrinivasan Sivaranjani, Anand Pal Singh, Chinnakonda S. Gopinath

Abstract:
High sulfide conversion and predominant sulfoxide yield has been observed with 0.1% vanadium doped disordered mesoporous Ti1−xVxO₂ material at ambient and sub ambienttemperatures using environmentally green H₂O₂ oxidant. Ti1−xVxO₂ materials were prepared by one-pot solution combustion method in less than 15 min and thoroughly characterized by X-ray diffraction, HRTEM, Raman spectra and other physicochemical techniques. Different sulfides, such as, phenylsulfide, methyl-p-tolylsulfide, ethylsulfide, thioanisole, were converted into the corresponding sulfoxide. Isolated V⁵⁺ incorporated in the TiO₂ lattice is likely to be the active species for the sulfide oxidation reaction. Catalyst recycling studies indicates the robustness of the catalyst.

Keywords:
Heterogeneous catalysis
Mesoporous TiO₂
Sulfoxidation
Hydrogen peroxide
Combustion synthesis
Ambient oxidation
Sulfoxide

Published in: Applied catalysis A: General  (Volume 452, Pages 1-222, 15 February 2013)

Publisher: Elsevier

ISSN Information: 0926-860X

Disordered mesoporous V/TiO2 system for ambient oxidation of sulfides to sulfoxides

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