Amino Silica Gels Acting as a Carbon Dioxide Absorbent

Abstract

Abstract Amino silica gels, silica gels bound with amines through covalent bond, were prepared by hydrolysis-condensation polymerization using three aminoalkyltrimethoxysilanes. The 2-[4-(2-aminoethylaminomethyl)phenyl]ethyl group absorbed CO2 with equal efficiency both in the silica gel and in the aminoalkyltrimethoxysilane. Suspension of amino silica gels in DMF and in water absorbed CO2 effectively and reversibly.