▎ 摘　　要

NOVELTY - Process of removing a volatile organic compound from a gaseous feedstream, involves contacting the gaseous feedstream comprising an initial concentration of volatile organic compound with a sorbent under adsorption conditions sufficient to produce an effluent stream comprising a reduced concentration of volatile organic compound with respect to initial concentration, and reacting under conditions sufficient to produce functionalized graphene. The sorbent comprises a functionalized graphene obtained by reacting graphene oxide with an amine-based compound (I). USE - Process of removing volatile organic compound e.g. odoriferous compound, irritant, pollutant or contaminant, preferably formaldehyde from gaseous feedstream e.g. air used for purifying indoor air and ventilation air, and reducing pollutants in industrial waste gas streams. ADVANTAGE - The method is capable of reducing concentration of volatile organic compound in the gaseous feedstream. The sorbent used in the method has improved sorbent capacity with respect to polar volatile organic compounds, lifetime, thermal and attrition resistance, and regeneration capability at lower temperature. DETAILED DESCRIPTION - Process of removing a volatile organic compound from a gaseous feedstream, involves contacting the gaseous feedstream comprising an initial concentration of volatile organic compound with a sorbent under adsorption conditions sufficient to produce an effluent stream comprising a reduced concentration of volatile organic compound with respect to initial concentration, and reacting under conditions sufficient to produce functionalized graphene. The sorbent comprises a functionalized graphene obtained by reacting graphene oxide with an amine-based compound of formula: NHR2 (I). R = H, 1-5C alkyl, or 1-5C aminoalkyl.