▎ 摘　　要

NOVELTY - The preparation method of graphene-zirconia fiber composite aerogel involves adding zirconia fiber and dispersing agent to water and stirring, adding graphene oxide to zirconia fiber suspension, ultrasonically agitating to obtain graphene oxide-zirconia fiber dispersion liquid, adding graphene oxide-zirconia fiber dispersion liquid to reducing agent to obtain sample, washing sample with deionized water and aqueous ammonia and storing, and finally freeze-drying and supercritical drying. USE - The method is useful for preparing graphene-zirconia fiber composite aerogel (claimed). ADVANTAGE - The method enables preparation of graphene-zirconia fiber composite aerogel with excellent strength under mild conditions. DETAILED DESCRIPTION - The preparation method of graphene-zirconia fiber composite aerogel involves adding zirconia fiber and dispersing agent in weight ratio of 2-10:1 to water and stirring for 6-24 hours to obtain zirconia fiber suspension, adding graphene oxide to zirconia fiber suspension in mass ratio of 0.1-2:1, ultrasonically agitating to obtain graphene oxide-zirconia fiber dispersion liquid, adding graphene oxide-zirconia fiber dispersion liquid to reducing agent in weight ratio of 10-1:1, reducing the temperature to 80-180 degrees C for 1-24 hours to obtain sample, washing sample with deionized water and 10-28% aqueous ammonia and storing at 90 degrees C for 0.5-2 hours, and finally freeze-drying and supercritical drying. The dispersing agent is sodium dodecyl sulfate, Triton X-100 (RTM: Nonionic surfactant), polyethylene glycol and/or polymethyl methacrylate. The reducing agent is ammonium sulfide, sodium sulfide, sodium hydrosulfide, melamine, polyethyleneimine, spermine, hydrazine hydrate, sodium borohydride or hydrogen iodide.