Abstract
Mesoporous silicon carbide with high specific surface area was successfully synthesised from a MCM-48/polyacrylamide nanocomposite precursor in two temperature ranges of 650–700°C and 800–850°C by a magnesiothermic reduction process. The MCM-48/polyacrylamide precursor nanocomposite was prepared by in situ polymerisation. Heat treatment using low concentrations of acrylamide monomer in the temperature range of 650–700°C and using high concentration of acrylamide monomer was carried in two temperature ranges of 650–700°C and 800–850°C. The products were characterised by X-ray diffraction, TEM and N2 adsorption–desorption. The results show that synthesised SiC in both temperature ranges of 650–700°C and 800–850°C is mesoporous and has specific surface of 194/60 and 167/84 m2 g−1 respectively. The results also show that the value of carbon content and the concentration of acrylamide monomer (factor affecting the amount of contact surface of carbon and silica) impress the starting temperature of the reaction.
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