▎ 摘　　要

NOVELTY - Preparing a metal organic frame-derived γ-ferric oxide-carbon/reduced graphene oxide composite gas gel material comprises (i) carrying out solvothermal reaction of iron salt, surfactant and organic ligand to prepare metal organic framework MIL101 precursor; and (ii) mixing the precursor and graphene oxide in a solvent evenly, freeze-drying, and calcining at high temperature at 400-800℃, heating rate of 1-5℃/min for 0.5-4 hours. USE - The method is useful for preparing a metal organic frame-derived γ-ferric oxide-carbon/reduced graphene oxide composite gas gel material is useful in the preparation of electromagnetic wave absorbing devices (claimed). ADVANTAGE - The method prepares metal organic frame-derived γ-ferric oxide-carbon/reduced graphene oxide composite gas gel material with strong reflection loss, low filling amount, wide frequency bandwidth and light weight and used for electromagnetic wave absorption with good impedance matching performance, strong electromagnetic wave loss capability, and a strong absorbing properties. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a metal organic frame-derived γ-ferric oxide-carbon/reduced graphene oxide composite gas gel material, prepared as mentioned above.