▎ 摘　　要

NOVELTY - Preparing graphene-aluminum oxide porous composite material comprises (i) adding ammonium bicarbonate or ammonium carbonate into 0.05-0.15 g/l graphene oxide dispersion solution to dissolve, forming mixed slurry of ammonium bicarbonate or ammonium carbonate content of 1-3 wt.%, (ii) using a vacuum coating process, coating the mixed slurry on the inner and outer surfaces of the porous alumina sheet, then performing heat treatment, and repeatedly coating-heat treatment to obtain the graphene oxide-alumina porous composite material, and (iii), carrying out thermal reduction of graphene oxide-alumina porous composite material under the hydrogen atmosphere to obtain the product. USE - The graphene-aluminum oxide porous composite material is useful in capacitor de-ionized electrode for sea water desalination and salt-containing waste water treatment (claimed). ADVANTAGE - The graphene-aluminum oxide porous composite material has high specific surface area, good hole structure and mechanical strength, and good conductivity, has excellent removing performance. The method is simple, economical, excellent performance, easy control operation condition. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the graphene-aluminum oxide porous composite material.