▎ 摘　　要

NOVELTY - Adsorbing/sensing anionic material, comprises (a) reacting graphene oxide and cationic material to form a cationic graphene, and (b) adsorbing the anionic material on the cationic oxidized graphene. USE - The method is useful in adsorbing/sensing anionic material for producing composition of sensor (all claimed). ADVANTAGE - The method improves conductivity and thermal stability of anionic material. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for composition comprising cationic graphene formed by reaction of graphene oxide and cationic material.