▎ 摘　　要

NOVELTY - A nanocomposite material comprises conductive polymer material and graphene as carrier. The conductive polymer material is polyaniline, polypyrrole, polythiophene and its ring-substituted derivative, and/or heteroatom-substituted derivative. USE - Nanocomposite material used for recovering waste material from electrochemical reduction reaction of metal, preferably gold, silver, molybdenum, palladium, mercury, copper, tin and/or chrome (all claimed). ADVANTAGE - The nanocomposite material increases recovery efficiency of metal, and it has higher specific surface area, higher adsorption and reduction ability, and no gathering and adhesion problem. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of nanocomposite material comprising dissolving polyaniline, polypyrrole, polythiophene and its ring-substituted derivative and/or heteroatom-substituted derivative in dilute hydrochloric acid to obtain first solution; dispersing graphene oxide powder or graphene oxide fiber in deionized water to obtain second solution, mixing with first solution, and filtering or high-speed centrifuging to obtain protonated conductive polymer-graphene solid product; and deprotonating in dilute ammonia solution, washing with deionized water to remove ammonia, drying, crushing and sieving.