▎ 摘　　要

NOVELTY - Forming graphene nano alloy composite material involves uniformly mixing noble metal salt solution and transition metal salt solution at a concentration of 1 g/(100-1000 ml) with graphene oxide aqueous solution, adjusting pH at more than 10 by using alkali solution, then adding reducing agent at 80-100 degrees C and stirring for 3-10 hours, centrifuging, washing to neutral, drying at 60-120 degrees C and grinding to obtain black powder; and placing black powder in a tubular furnace, under protection of inert gas at 300-400 degrees C, followed by hydrogen reduction and subjecting to inert atmosphere. USE - For the preparation of graphene nano alloy composite material which is used as a carrier (claimed) for magnetic targeting material, catalyst, an electromagnetic wave shielding material, super capacitor electrode material and other related to functional material field. ADVANTAGE - The present composite material has high nano particles load flow; has stable and uniform structure; has good dispersibility; has strong bonding force; is cost-effective; prepared by simple technique and easy operation; and has low impurity content. DETAILED DESCRIPTION - Preparation of graphene nano alloy composite material as a carrier involves: adding noble metal (N') salt solution and transition metal (M') salt solution at a concentration of 1 g/(100-1000 ml) in graphene oxide aqueous solution and uniformly mixing, adjusting pH value at more than 10 by using alkali solution, then adding reducing agent at 80-100 degrees C to agitate and stirring for 3-10 hours, after finishing reaction, centrifuging, washing to neutral, drying at 60-120 degrees C and grinding to obtain black powder; and placing the black powder in a tubular furnace, under protection of inert gas at 300-400 degrees C, followed by hydrogen reduction for 60-120 minutes, and then subjecting to inert atmosphere at 450-600 degrees C for 60-130 minutes so as to obtain the nano N'-M'/graphene composite material, where the noble metal is Pd or Pt as a soluble bivalent salt, and the transition metal is Co, Ni or Cu as a soluble bivalent salt. The mol ratio of noble metal element and transition metal element is 0.1-10:1 to 1:2-400. The reducing agent is selected from sodium borohydride or hydrazine hydrate. The mass ratio of the sodium borohydride and graphene oxide is 1:5-10. The volume mass ratio of the hydrazine hydrate and the oxidized graphite alkene is 20-100 ml:1 g.