▎ 摘　　要

NOVELTY - The preparation method of iron cobaltate/reduction graphene composite absorbing material involves (i) preparing graphite oxide using Hummers method, and ultrasonically treating to obtain graphene oxide solution, (ii) dissolving ferrous salt and cobalt salt in distilled water, mixing, dripping into graphene oxide solution in an inert gas protection atmosphere, and mechanically mixing to obtain a mixed liquid, (iii) adding sodium borohydride into distilled water, adjusting to alkaline, mixing, adding into mixed liquid, reacting in an oil bath to obtain product (a). USE - Preparation of iron cobaltate/reduction graphene composite absorbing material (claimed). ADVANTAGE - The environmentally-friendly method enables the preparation of iron cobaltate/reduction graphene composite absorbing material in a short time with high efficiency, and high electromagnetic waves absorption intensity, and wide adsorption bandwidth. DETAILED DESCRIPTION - The preparation method of iron cobaltate/reduction graphene composite absorbing material involves (i) preparing graphite oxide using Hummers method, and ultrasonically treating to obtain 2-5 mg/ml graphene oxide solution, (ii) dissolving ferrous salt and cobalt salt in distilled water, mixing, dripping into graphene oxide solution in an inert gas protection atmosphere, and mechanically mixing to obtain a mixed liquid, (iii) adding sodium borohydride into distilled water, adjusting to alkaline, mixing, adding into mixed liquid, reacting in an oil bath at 60-120 degrees C for 1 hour to obtain product (a), adsorbing water with a magnet, washing with alcohol, adjusting pH to 7, and vacuum drying to obtain product (b), where the ratio of ferrous salt, cobalt salt, graphene oxide, and sodium borohydride is 1.2-6.0 g:1.4-7.2 g:100-140 ml:5.8-6.7 g, (iv) triturating the product (b), placing in a ceramic boat, adding into a tube furnace, heating in an inert gas protection atmosphere at 400-800 degrees C, and high temperature annealing for 1-2 hours.