▎ 摘　　要

NOVELTY - Method for preparing uniformly dispersed zinc oxide-multilayer graphene composite material by (i) dissolving anhydrous zinc nitrate and polyvinylpyrrolidone in an alcoholic organic solvent, and uniformly mixing them to obtain a solution, (ii) stirring the solution prepared in the step (i) at a high temperature until the mixture is evenly mixed, during the stirring process, dripping the mixture of ethanol and ethylene glycol to obtain a sol-gel system, and (iii) transferring the sol-gel system obtained in the step (ii) into a porcelain boat for drying, calcining and heat-treating under inert gas to obtain a black powdery material. USE - The composite material is used as an electromagnetic wave absorber (claimed). ADVANTAGE - The method has simple process, adjusts the zinc oxide particle size, dispersion density and thickness of the multilayer graphene, has excellent electromagnetic wave absorption performance, and properties in different thicknesses, and achieves absorption intensity and absorption bandwidth. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for adjusting the particle size of zinc oxide using above-mentione method by adjusting the raw material mixing ratio (V) ethanol and (V) ethylene glycol.