▎ 摘　　要

NOVELTY - Graphene-iron oxide complex comprises graphene and needle-like iron oxide nanoparticles grown on a surface of the graphene. USE - The graphene-iron oxide complex is useful in a purification filter for removal of heavy metals (claimed). ADVANTAGE - The graphene-iron oxide complex has increased adsorption of heavy metals by virtue of a high specific surface area (more than 200 m2/g), flexibility and an effective selective separation. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) a purification filter for removal of heavy metals comprising employing the graphene-iron oxide complex as a membrane filter; (2) a method for fabricating the graphene-iron oxide complex comprising: (a) preparing a reduced graphene dispersed solution; (b) mixing the dispersed solution with a solution containing iron oxide precursors to prepare a mixture; (c) stirring the mixture to prepare a graphene-iron oxide complex dispersed solution containing the graphene iron oxide complex so that needle-like iron oxide nanoparticles are grown on the surface of the graphene; and (d) separating the graphene-iron oxide complex from the graphene-iron oxide complex dispersed solution; (3) removing heavy metals comprising: bonding the fabricated graphene-iron oxide complex, to heavy metals contained in contaminated water; forming a magnetic field; and separating the heavy metal-bonded graphene-iron oxide complex; (4) fabricating the purification filter for removal of heavy metal comprising employing the fabricated graphene-iron oxide complex, as a membrane filter; and (5) removing heavy metals comprising rendering contaminated water containing heavy metals flow through the fabricated purification filter for removal of heavy metals, in a contact state with each other, so as to remove the heavy metals.