▎ 摘　　要

NOVELTY - Preparing graphene oxide/poly dopamine composite airgel comprises (i) dissolving dopamine powder in distilled water, adding graphene oxide, mixing to obtain a graphene oxide/dopamine mixed solution, (ii) stirring and dropping tris buffer, continuing stirring, allowing to stand, carrying out polymerization reaction of dopamine to obtain graphene oxide/poly dopamine composite hydrogel, (iii) placing the graphene oxide/poly dopamine composite hydrogel under -20 to -10 degrees C for 24-30 hours, freezing and drying. USE - The method is useful for preparing graphene oxide/poly dopamine composite airgel (claimed). ADVANTAGE - The gel has high porosity and excellent adsorption property. DETAILED DESCRIPTION - Preparing graphene oxide/poly dopamine composite airgel comprises (i) dissolving 0.15-0.7 g dopamine powder in 10-18 ml distilled water, adding 50-60 ml of 5-6 mg/ml graphene oxide, mixing to obtain a aqueous solution, stirring for 30-40 minutes to obtain graphene oxide/dopamine mixed solution, (ii) stirring and dropping 3-9 ml of 0.1-0.12 mol/l tris buffer, continuing stirring for 2-2.5 hours, allowing to stand, carrying out polymerization reaction of dopamine to obtain graphene oxide/poly dopamine composite hydrogel, (iii) placing the graphene oxide/poly dopamine composite hydrogel under -20 to -10 degrees C for 24-30 hours, freezing and drying.