reparation of Ag-Doped Composite Carbon Molecular Sieves

摘要

The copolymer of acrylonitrile and γ-methacryloxypropyltrimethoxysilane (KH-570) was synthesized with Ag~+ by inverse suspension copolymerization as carbon precursor, through carbonization and co-reduction, to obtained Ag-doped composite carbon molecular sieves . The thermal stability and microstructure of samples were studied by TGA, FTIR, XRD and nitrogen adsorption at 77 K, respectively. Result showed that during the high-heat treatment, precursor displayed similar pyrolysis behaviour, carbon residue increasing from 12 to 31 % with KH-570 content decreased; after carbonization, the inorganic phase (Si) was incorporated into carbon molecular sieves successfully and Ag~+ was reduced to silver form. With the KH-570 content increasing, carbonization products possess a higher specific surface area (reached 1056 m~2/g) and larger micropore volume (reached 0.45 cm~3/g, account for ca, 70 %).