▎ 摘　　要

NOVELTY - Preparing composite absorbing material containing graphene coated iron(II,III) oxide nano-particles comprises e.g. dissolving iron(II,III) oxide nanoparticles in deionized water, and then subjecting to ultrasonic dispersion to obtain dispersion A, adding dispersion A into dispersion B, drying to obtain product of iron(II,III) oxide nano-particles first coated with graphene, then dissolving 80 mg graphite oxide in 80 ml ethanol to obtain aqueous ethanol solution of graphene, and dispersing the iron(II,III) oxide nano-particles coated with graphene in 80 ml graphene. USE - The method useful for preparing composite absorbing material containing graphene coated iron(II,III) oxide nano-particles(claimed). ADVANTAGE - The method has simple preparation process and material has strong absorbing property. DETAILED DESCRIPTION - Preparing composite absorbing material containing graphene coated iron(II,III) oxide nano-particles comprises dissolving iron(II,III) oxide nanoparticles in deionized water, and then subjecting to ultrasonic dispersion, ultrasound for 10-20 minutes to obtain dispersion A; dissolving graphene in deionized water, and then subjecting to ultrasonic dispersion, ultrasound for 10-20 minutes to obtain dispersion B; (i) adding dispersion A into dispersion B obtained in step (ii), then stirring to obtain the mixed solution, where the mixture is centrifuging at 5000-10000 revolutions per minute for 10-20 minutes obtain black precipitate using vacuum filtration, washing with deionized water, drying under vacuum at 40-60 degrees C to obtain product of iron(II,III) oxide nano-particles first coated with graphene, then 80 mg of graphite oxide dissolving in 80 ml ethanol and water in a volume ratio of 1: 1 of an aqueous ethanol solution, to obtain aqueous ethanol solution of graphene, and (iii) dispersing the iron(II,III) oxide nano-particles coated with graphene in 80 ml of graphene in an aqueous ethanol solution to obtain uniform mixture, then adding into high-pressure reactor, then carrying out the hydrothermal reaction at 180 degrees C for 6-12 hours, then vacuum filtrating, washing with deionized water, and drying under vaccum at 45 degrees C, to obtain product of iron(II,III) oxide nano-particles second coated and final product.