▎ 摘　　要

NOVELTY - Preparation of manganese sulfide and graphene electromagnetic wave absorption composite material comprises mixing manganese (II) nitrate, cysteine and urea to graphene oxide (GO) dispersion for 20-40 minutes to obtain uniform mixed solution, sending mixed solution to Teflon lining, sealing in stainless steel reactor, reacting at 140-180 degrees C for 18-28 hours, cooling to room temperature in fume hood, centrifuging, cleaning reaction product with deionized water and absolute ethanol, freezing reaction product at - 10 to - 20 degrees C, freeze-drying at - 40 to - 60 degrees c to obtain preliminary reaction product, heating preliminary reaction product in argon for 2-6 hours at 400-600 degrees C and cooling to room temperature. USE - The preparation of manganese sulfide and graphene electromagnetic wave absorption composite material is used for electromagnetic wave absorption or electromagnetic protection facilities (claimed). ADVANTAGE - The material is simple, cost-effective, ultra-thin and light weight.