▎ 摘　　要

NOVELTY - Preparing graphene aerogel with absorptive properties comprises (a) dispersing the chitosan powder in acetic acid solution, stirring until all is dissolved, and marking as solution A, (b) dispersing graphite oxide and metal salt in water, sonicating to completely dissolve, and marking as solution B, (c) mixing solution-A and solution-B, stirring well, and mixing evenly, (d) transferring the mixed solution to a plastic freezing mold, and starting freeze-drying under the condition of liquid nitrogen refrigeration, after the upper surface of the liquid in the plastic mold is frozen, transferring to a lyophilizer with a preset temperature until it is completely lyophilized to obtain a dry gel, and (e) annealing the dry gel at 800 degrees C for 2 hours under argon atmosphere to obtain a nitrogen-doped three-dimensional ordered pore reduced graphene oxide aerogel with embedded metal nanoparticles. USE - The method is useful for preparing graphene aerogel with absorptive properties. ADVANTAGE - The method is simple, economical and suitable to prepare in largescale.