▎ 摘　　要

NOVELTY - Method for preparing a graphene oxide/gelatin composite filler, involves (a) washing the polypropylene, polyethylene, PVC or polyester fillers in an ultrasonic cleaner with acetone, absolute ethanol and deionized water in the same order to remove contaminants and impurities on the surface, and naturally drying, (b) putting the polyethylene filler treated in step (a) in a mixed solution of nitric acid and sulfuric acid, heating in the water bath to react, taking it out for washing, and drying, (c) dispersing graphene oxide into a gelatin solution to prepare a graphene oxide/gelatin dispersion, and (d) soaking the polyethylene filler in the glutaraldehyde solution, taking it out, then soaking it in the graphene oxide/gelatin solution, taking it out, washing, and drying to obtain the graphene oxide/gelatin composite filler. USE - Method for preparing a graphene oxide/gelatin composite filler. ADVANTAGE - The method uses the dipping method to load graphene oxide/gelatin on the surface of the filler, that increases the specific surface area and biological affinity of the filler, and adsorbs a large amount of organic matter. The composite filler has strong oxidation ability and strong impact resistance, enhances the adsorption effect of microorganisms, and achieves purification.