▎ 摘　　要

NOVELTY - Nano-complex material comprises a matrix and nano-particle loaded on the surface of the substrate, the substrate comprises a graphene and/or graphene derivatives and the nanoparticle comprises iron oxide and magnesium hydroxide. USE - The nano-complex material is useful in water treatment (claimed). ADVANTAGE - The nano-complex material has removal rate of cupric ion, silver ion and zinc ion in the nanocomplexes can reach to 99.9%, 99.9%, 88% and 85% respectively for the initial concentration of 50 ppm. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the nano-complex material comprising (a) mixing the base material with water-soluble ferrous salt, soluble ferric salt, water soluble magnesium salt and water, to obtain mixed solution and (b) adding the alkali solution and carrying out precipitating reaction.