▎ 摘　　要

NOVELTY - Preparing air purifying material comprises soaking hydrogel of bacterial cellulose in deionized water, compacting for removing water, heating and dissolving polyacrylonitrile, performing electrostatic spinning to obtain polyacrylonitrile nanofibers, and dispersing in solvent, dispersing graphene oxide in deionized water, adding bacterial cellulose and polyacrylonitrile nanofibers, stirring, then transferring to hydrothermal stirred tank for performing hydrothermal reaction, and freeze-drying to obtain graphene-polyacrylonitrile-bacterial cellulose aerogel, adding graphene-polyacrylonitrile-bacterial cellulose aerogel to deionized water, stirring, continuing adding tetrabutyl titanate, manganese chloride and potassium permanganate solution, mixing, adding ammonia solution in a drop wise manner, and heating to obtain graphene-polyacrylonitrile-bacterial cellulose aerogel-chromium doped titanium dioxide-manganese oxide composite material. USE - The method is useful for preparing air purifying material. DETAILED DESCRIPTION - Preparing air purifying material comprises (a) soaking hydrogel of bacterial cellulose in deionized water, and compacting for removing water, (b) heating and dissolving polyacrylonitrile, performing electrostatic spinning to obtain polyacrylonitrile nanofibers, and dispersing in solvent, (c) dispersing graphene oxide ultrasonically in deionized water, then adding bacterial cellulose and polyacrylonitrile nanofibers, stirring, then transferring to hydrothermal stirred tank for performing hydrothermal reaction, and freeze-drying to obtain graphene-polyacrylonitrile-bacterial cellulose aerogel, and (d) adding graphene-polyacrylonitrile-bacterial cellulose aerogel to deionized water, then adding chromium source, stirring, continuing adding tetrabutyl titanate, manganese chloride and potassium permanganate solution, mixing, adding ammonia solution in a drop wise manner, and heating at 140-200 degrees C for reacting for 5-10 hours to obtain graphene-polyacrylonitrile-bacterial cellulose aerogel-chromium doped titanium dioxide-manganese oxide composite material. An INDEPENDENT CLAIM is also included for air purifying material prepared by the above method.