| abstract |
Metallo-monolithic nanoparticulate oxides with multi-scale porosity Process for the preparation of a monolith of nanoparticulate mixed oxides with multi-scale porosity of formula (I) MOxSiO2 (I) in which M represents a metal or a metalloid chosen from the group comprising Cr, Co, Mn, Ni, Ce, V, Y, W, Nb, Mo, Fe, Zn, Ta, Sn, Cd, Cu and In and x represents the M/Si molar ratio and is a number between 0, 05 and 0.57, said method comprising a step of emulsifying an oily phase in a homogeneous acidic aqueous phase, said aqueous phase comprising a cationic surfactant, at least one metal salt precursor of metal oxide and a precursor of silica, a polycondensation step, a step for eliminating the oily phase by overnight treatment with dichloromethane and a calcination step at a temperature between 500 and 700°C. |