▎ 摘　　要

NOVELTY - Preparing composite wave absorbing film material comprises (i) adding copper nitrate trihydrate and trimesic acid with mass ratio of 1.1-1.5:1 into equal volumes of deionized water and ethanol respectively, stirring and dissolving and mixing to obtain liquid A, (ii) adding graphite oxide hydrosol into ethanol and ultrasonically dispersing to obtain a 0.4-0.6 mg/ml graphene oxide solution, (iii) adding graphene oxide solution to liquid A of equal volume and stirring to obtain the liquid B, (iv) suction filtering liquid B to obtain suction filtration membrane attached with HKUST-1/graphene oxide composite film, (v) drying the suction filter membrane in the air, and the attachments fall off naturally to obtain the HKUST-1/graphene oxide composite film, and (vi) obtaining HKUST-1/graphene oxide composite film by subjecting the HKUST-1/graphene oxide composite film to high temperature treatment of 300-900°C for 2-4 hours in nitrogen atmosphere. USE - The method is useful for preparing composite wave absorbing film material used for gas adsorption. ADVANTAGE - The method: is simple; prepare composite film in air without heating and an external electric field, which is more energy-saving and efficient, and is favorable for industrialized mass production. The composite absorbing film after high temperature treatment has good comprehensive absorbing performance, and the maximum electromagnetic wave absorption rate can reach 94.4%. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for composite wave absorbing film material, prepared by above method.