▎ 摘　　要

NOVELTY - Thiol group-containing graphene oxide material has a three dimensional (3D) structure. USE - Thiol group-containing graphene oxide material used for recovering metal ions from water or waste water (claimed). ADVANTAGE - The thiol group-containing graphene oxide material realizes the recovery of heavy metal ions (such as silver ions) from water, and has good application prospects. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing a graphene oxide material, which involves adding graphene oxide to deionized water, to form the suspension of the graphene oxide of 1-20 g/L, adjusting the pH range of the suspension of the obtained graphene oxide to 4-6, carrying out ultrasonic treatment to the suspension of pH-regulated graphene oxide to form a sheet-like structure, and forming a uniform and stable dispersion of graphene oxide, dissolving mercaptoamines in deionized water, adjusting the pH range of the obtained aqueous solution of mercaptoamines to 4-6 to form an aqueous solution of mercaptoamines with a concentration of 1-24 g/L, adding the aqueous solution of the prepared mercaptoamines to the dispersion of the prepared graphene oxide, where volume ratio of the prepared aqueous solution of mercaptoamines to the prepared dispersion of graphene oxide is 1:10-10:1, carrying out solid/liquid separation by centrifugation to the mixture of the aqueous solution of the obtained mercaptoamines and the dispersion of graphene oxide, adding sodium dithionite (Na2S2O4) aqueous solution to the solid, where volume of the aqueous solution of the added Na2S2O4 is equal to the sum of the volume of the aqueous solution of the prepared mercaptoamines and the dispersion of the prepared graphene oxide, freeze-drying the obtained solid and obtaining a graphene oxide material containing mercapto groups.