▎ 摘　　要

NOVELTY - Preparing a three-dimensional oriented porous airgel loaded hollow oxide nanocube comprises (1) preparing chitosan/graphene oxide airgel by directional freezing method, and carbonizing chitosan/graphene oxide airgel to obtain carbon/reduced graphene oxide airgel, (2) loading zeolitic imidazolate framework-67 (ZIF-67) nanocube with hollow structure on carbon/reduced graphene oxide airgel, and (3) processing airgel obtained in step (2) using the solution containing M metal ion, drying, and annealing to obtain three-dimensional oriented porous airgel loaded hollow oxide nanocube, where the M metal ion is at least one of nickel ion, ferrous ion, copper ion, zinc ion and manganese ion. USE - The three-dimensionally oriented porous aerogel is useful in the field of wave absorption (claimed). ADVANTAGE - The three-dimensional oriented porous airgel has three-dimensional ordered carbon-based channels. The hollow oxide nanocube and heterogeneous carbon/reduced graphene oxide interface prepares wave-absorbing materials with low density, low filling ratio, strong absorption and Ultra-wideband (UWB) absorption. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for three-dimensionally oriented porous aerogel.