Preparation method and application of boron adsorbent aerogel

The invention discloses a boron adsorbent aerogel preparation method, which comprises: (1) sequentially adding a reducing agent and a carbon nano tube aqueous solution into a graphene oxide aqueous solution, adding meglumine, stirring to dissolve, transferring to a hydrothermal reaction kettle, reacting, and cooling to the room temperature to obtain meglumine/graphene/carbon nano tube hydrogel; (2) taking out the hydrogel obtained in the step (1), washing with water, and freeze-drying to obtain aerogel; and (3) immersing the aerogel obtained in the step (2) in an epichlorohydrin liquid, transferring into a hydrothermal reaction kettle, cooling to room temperature after reaction, opening the kettle, pouring and transferring the epichlorohydrin liquid in the system, repeatedly soaking and leaching the obtained solid with DMF until leacheate is colorless, then soaking and leaching with deionized water to obtain hydrogel, and freeze-drying. The boron adsorption aerogel prepared by the invention has a reinforced c