▎ 摘　　要

NOVELTY - A nitrogen-doped reduced graphene oxide aerogel absorbing material comprises three-dimensional network structure formed by self-assembly of a two-dimensional nitrogen-doped reduced graphene oxide sheet. USE - Nitrogen-doped reduced graphene oxide aerogel absorbing material for electromagnetic absorption and electromagnetic shielding application. ADVANTAGE - The nitrogen-doped reduced graphene oxide aerogel absorbing material is environmentally-friendly, prepared by simple and economical process under mild reaction conditions, has no toxic by-products, strong electromagnetic wave absorbing ability, wide absorbing frequency bandwidth, low density, low fill ratio, and achieves effective absorption of electromagnetic waves in different wavelength bands, by adjusting the nitrogen doping amount and the thickness of the absorbing coating. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of nitrogen-doped reduced graphene oxide aerogel absorbing material, which involves (S1) taking 4-00 mL beaker, adding 30 mL deionized water, then adding 60 mg graphite oxide, ultrasonically processing for 1 hour, vigorously stirring for 30 minutes to obtain graphene oxide aqueous dispersion with concentration of 2 mg/mL, (S2) slowly dripping 180, 240, 300, 360 mu L ethylenediamine and continuously stirring for 30 minutes, (S3) pouring the reaction solution into 50 mL reaction vessel and hydrothermally reacting at 120 degrees C for 12 hours, (S4) obtaining nitrogen-doped reduced graphene oxide hydrogel, slowly adding hydrogel to 100 mL of 10 vol.% aqueous solution of ethanol, dialyzing for 24 hours and changing the aqueous ethanol solution for every 6 hours, (S5) pre-freezing dialyzed hydrogel in a refrigerator for 12 hours and freeze-drying for 36 hours.