▎ 摘　　要

The graphene/carbon aerogels material was prepared by sol-gel method. The composite aerogels with different hierarchical micro-nanostructures and high conductivity were prepared. Releasing composite aerogels powder in air, the optic attenuation performance of aerogels was measured at infrared, visible and millimeter waves. The results indicated that the shielding ratio of 7%G-CA powder was above 97% and 94%, correspondingly, at the beginning of release and after 20 min, both in infrared and visible wave band. For millimeter wave band, the shielding ratio of 7% G-CA powder is above 75% and 65%, at the beginning of release and after 10 min, respectively. The study is expected to extend application of smoke jamming.