Host (aluminum incorporated mesocellulous silica foam (Al-MCF))-guest (tungsten polyoxometalate) nanocomposite material: an efficient and reusable catalyst for selective oxidation of sulfides to sulfoxides and sulfones
摘要:
A green, efficient and selective approach for the oxidation of sulfides to sulfoxides and sulfones with H2O2 at room temperature is reported. The reaction is performed in the presence of tungstophosphoric acid (PW12) supported on an aluminum incorporated mesocellulous silica foam (Al-MCF) (via both: the impregnation and encapsulation methods), as heterogeneous and reusable catalysts. The structural and textural characterizations of these catalysts were done using FTIR, X-ray diffraction, N-2 adsorption-desorption and TEM. (C) 2012 Elsevier B.V. All rights reserved.