▎ 摘　　要

NOVELTY - Supported graphene-based material comprises a three-dimensional graphene material and a rare earth-based basic nanomaterial supported on it. USE - The graphene-based material is useful for the removal of the high-activity polonium-210 aerosol in the lead-bismuth eutectic (LBE) fast reactor (claimed). ADVANTAGE - The supported graphene-based material: has the curing removal rate of polonium-210 not greater than 99%, and has application prospect. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparation of the supported graphene-based material comprising (1) preparing a rare earth nitrate solution, or optionally preparing or preparing a nitrate solution of an alkali metal or alkaline earth metal, (2) mixing at least one of the rare earth nitrate solution of step (1) and optionally at least one of the alkali metal or alkaline earth metal nitrate solution of step (1) with an organic amine including n-butylamine and continuously stirring to form a uniform mixed solution, and (3) using the resulting mixed solution and the three-dimensional graphene material, adding into a stainless steel hydrothermal kettle lined with polytetrafluoroethylene, heating to a specific temperature and keeping for a specific period of time to obtain the supported graphene-based material; (2) curing polonium-210 in polonium-210 aerosol in lead-bismuth eutectic (LBE) fast reactor comprising using the supported graphene-based material, where the rare earth-based basic nano material in the supported graphene-based material is used as a trapping agent for polonium-210; and (3) polonium-210 device for eliminating aerosol in lead-bismuth eutectic fast reactor comprising a numerical control moving bed, the moving bed is provided with at least one ceramic film tube, filling in the ceramic film tube made by the method according to any one of the supported graphene-based material, preferably, in the moving bed is provided with at least three ceramic membrane pipe, and further preferably, at least four ceramic film tube.