▎ 摘　　要

NOVELTY - Preparing graphene and ultra-thin manganese dioxide nanosheet hybrid aerogel comprises (i) dissolving 0.15-3 mmol surfactant in 30 ml deionized water, adding 240-267 ml deionized water, 1.8-18 ml 5-50 mM divalent manganese salt aqueous solution and 1.2-12 ml 5-50 mM heptavalent manganese brine solution, mixing uniformly, heating at 100-110 degrees C for 2 to 5 hours and filtering to obtain a dark brown manganese dioxide nanosheet precipitate, (ii) obtaining a brown ultra-thin manganese dioxide nanoplatelet colloidal solution, (iii) obtaining a graphene oxide by a modified Hummer method, purifying and ultrasonically dispersing to obtain an aqueous dispersion of graphene oxide, (iv) obtaining the black graphene and ultra-thin manganese dioxide nanosheet hybrid hydrogel and (v) freezing the hybrid hydrogel obtained in the step (iv), freeze-drying the frozen sample in a vacuum freeze dryer to obtain a reduced graphene and ultra-thin manganese dioxide nanosheet hybrid aerogel. USE - The method is useful for preparing graphene and ultra-thin manganese dioxide nanosheet hybrid aerogel. DETAILED DESCRIPTION - Preparing graphene and ultra-thin manganese dioxide nanosheet hybrid aerogel comprises (i) dissolving 0.15-3 mmol surfactant in 30 ml deionized water, adding 240-267 ml deionized water, 1.8-18 ml 5-50 mM divalent manganese salt aqueous solution and 1.2-12 ml 5-50 mM heptavalent manganese brine solution, mixing uniformly, heating at 100-110 degrees C for 2 to 5 hours and filtering to obtain a dark brown manganese dioxide nanosheet precipitate, (ii) washing the precipitate of the manganese dioxide nanosheet obrtained in the step (i) with ethanol and deionized water, purifying, adding 1.5-25 ml deionized water into the precipitate, carrying out ultrasonication for 5-10 minutes to obtain a brown ultra-thin manganese dioxide nanoplatelet colloidal solution, (iii) obtaining a graphene oxide by a modified Hummer method, purifying and ultrasonically dispersing to obtain an aqueous dispersion of graphene oxide, (iv) mixing the aqueous graphene oxide dispersion obtained in step (iii) with the ultra-thin manganese dioxide nanosheet colloidal solution obtained in step (ii), sonicating the mixed solution to a uniform no precipitation, adding the mixed solution to a polytetrafluoroethylene high pressure reactor for hydrothermal reaction and obtaining the black graphene and ultra-thin manganese dioxide nanosheet hybrid hydrogel and (v) freezing the hybrid hydrogel obtained in the step (iv), freeze-drying the frozen sample in a vacuum freeze dryer to obtain a reduced graphene and ultra-thin manganese dioxide nanosheet hybrid aerogel. An INDEPENDENT CLAIM is also included for the graphene and ultra-thin manganese dioxide nanosheet hybrid aerogel is obtained by the above mentioned methos.