▎ 摘　　要

NOVELTY - Preparation of airgel graphene comprises heating oxidized graphene; adding aqueous solution of sodium ion (Na+) and bicarbonate ion (HCO3-) to obtain hydrogel; heating hydrogel at 100-150 degrees C to obtain graphene hydrogel; soaking graphene hydrogel in deionized water; heating at stable temperature of 50-99 degrees C for 0.5-3 hours; conducting leaching or dialysis process to graphene hydrogel; freeze-drying or supercritical drying; and removing water in graphene hydrogel. USE - Method for preparing airgel graphene (claimed). ADVANTAGE - The method is simple; has mild reaction condition; uses non-toxic, pollution-free and easy to obtain raw material; and has low cost.