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

High sulfide conversion and predominant sulfoxide yield has been observed with 0.1% vanadium doped disordered mesoporous Ti1−xVxO2 material at ambient and sub ambient temperatures 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.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (125 K)Download as PowerPoint slideHighlights► V has been incorporated into the TiO2 lattice position. ► Ti1−xVxO2 exhibit disordered mesoporosity. ► Ti1−xVxO2 evaluated for oxidation of sulfides to sulfoxides at ambient and at 278 K with environmentally benign H2O2.