▎ 摘　　要

NOVELTY - Preparing hybrid membrane comprises e.g. (i) dissolving graphene oxide using N, N-dimethylformamide solvent, and stirring, (ii) adding N- beta -(aminoethyl)- gamma -aminopropyltrimethoxysilane silane coupling agent into obtained graphene oxide solution, stirring and carrying out sol-gel reaction, (iii) adding obtained hybrid precursor into certain mass concentration of polyvinyl alcohol aqueous solution, continue reaction, allowing obtained substance to stand, and defoaming to obtain coating film solution, and (iv) (either) coating the coating film solution directly on support after allowing to stand and defoaming until a membrane is obtained, allowing to stand to separate membrane from the support, drying the membrane, and cooling to obtain hybrid membrane without a support, (or) coating the coating film solution directly on support after allowing to stand and defoaming until a membrane is obtained, drying the support and membrane together, and cooling to obtain hybrid membrane with a support. USE - The hybrid membrane is useful for selectively adsorbing and separating copper ions from mixed metal solution (claimed); and for separating and purifying copper ions in mixed wastewater solution containing multiple metal ions. ADVANTAGE - The hybrid membrane: has strong selective adsorption performance for copper ions in a mixed metal ion solution. DETAILED DESCRIPTION - Preparing hybrid membrane comprises (i) dissolving graphene oxide using N, N-dimethylformamide solvent at 20-80 degrees C under an inert atmosphere or air, and stirring for 1-24 hours to obtain graphene oxide solution, (ii) adding N- beta -(aminoethyl)- gamma -aminopropyltrimethoxysilane silane coupling agent (KH-792) into the obtained graphene oxide solution, then stirring and carrying out sol-gel reaction for 1-24 hours to obtain hybrid precursor, where mass ratio between graphene oxide and N- beta -(aminoethyl)- gamma -aminopropyltrimethoxysilane silane coupling agent is 1:0.1-10, (iii) adding hybrid precursor obtained in step (ii) into certain mass concentration of polyvinyl alcohol aqueous solution, continue reaction for 1-24 hours, then allowing the obtained substance to stand, and defoaming to obtain coating film solution, where mass ratio between polyvinyl alcohol and N- beta -(aminoethyl)- gamma -aminopropyltrimethoxysilane silane coupling agent is 1:0.01-1, and (iv) (either) coating the coating film solution directly on the support after allowing to stand and defoaming until a membrane is obtained, allowing to stand at room temperature for 1-48 hours to separate membrane from the support, then drying the membrane at 20-80 degrees C for 1-48 hours, and cooling to obtain hybrid membrane without a support, (or) coating the coating film solution directly on the support after allowing to stand and defoaming until a membrane is obtained, then drying the support and membrane together at 10-80 degrees C for 1-48 hours, and cooling to obtain hybrid membrane with a support.