▎ 摘　　要

NOVELTY - Preparing air purifying agent comprises e.g. (i) adding graphene oxide into solvent, ultrasonicating for 40-120 minutes to obtain oxidized graphene emulsion, (ii) adding dispersant into graphene oxide emulsion, adding photocatalyst to obtain mixed solution of graphene and photocatalyst, (iii) adding mixture of graphene oxide and photocatalyst into homogenizer, and homogenizing at 40-70 degrees C for 10-60 minutes under pressure of 15-35 MPa to obtain graphene and photocatalyst homogeneous solution, and (iv) adding flavor into graphene oxide and photocatalyst homogeneous liquid. USE - The method is useful for preparing air purifying agent (claimed). DETAILED DESCRIPTION - Preparing air purifying agent comprises (i) adding graphene oxide into solvent in a mass ratio of 1:10-30 and ultrasonicating for 40-120 minutes to obtain oxidized graphene emulsion, (ii) adding dispersant into graphene oxide emulsion, stirring, adding photocatalyst to obtain mixed solution of graphene and photocatalyst, where mass ratio between graphene emulsion, dispersant and photocatalyst is 100:0.1-0.5:5-30, (iii) adding mixture of graphene oxide and photocatalyst into homogenizer, and homogenizing at 40-70 degrees C for 10-60 minutes under pressure of 15-35 MPa to obtain graphene and photocatalyst homogeneous solution, and (iv) adding flavor into graphene oxide and photocatalyst homogeneous liquid to obtain air purifier, where mass ratio between graphene and photocatalyst homogenizer and flavor is 1000:0-2, the solvent is water, ethanol and glycerol, dispersant is sodium tripolyphosphate, polyacrylamide, sodium polyacrylate and sodium dodecyl sulfate and the photocatalyst is nano-titanium dioxide, nano zinc oxide, nano iron oxide, p25 and nano-zinc sulfide.