Mesoporous W/Ti mixed metal oxide with a high surface area (295 cm2/g) was fabricated via a surfactant-assisted synthesis route. The oxidation of aniline to nitrosobenzene, catalyzed by W/Ti mixed metal oxide occurs with &gt;99% selectivity and &gt;99% conversion in the presence of H2O2 as the oxidant and toluene as the solvent. The heterogeneously catalyzed reaction occurs within 30 minutes at room temperature without catalyst leaching. The catalyst was characterized using X-ray diffraction (XRD), nitrogen adsorption-desorption isotherms, scanning electron microscopy (SEM), Energy dispersive X-ray spectroscopy (EDX), Transmission electron microscopy (TEM), elemental mapping, X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and thermogravimetric analysis (TGA). The amounts of reagents/species used (substrate, catalyst, oxidant, and solvent), type of oxidant, the solvent used, the reaction time, and the reaction temperature were optimized. The catalyst is reusable at least up to 5 cycles without any significant loss of activity. A radical mediated reaction mechanism is proposed for the catalytic oxidation of aniline to nitrosobenzene.

Facile approach for the oxidation of aniline to nitrosobenzene using mesoporous W/Ti mixed metal oxide

256th National Meeting (2018)

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