▎ 摘　　要

NOVELTY - Preparing graphene oxide composite filter material comprises (i) sieving zeolite powder through 100 meshes sieve to remove large particles, adding powder to 0.1-5 mol/l silver nitrate solution, uniformly stirring, filtering mixture to obtain solid, drying and sintering solid at 150-500 degrees C to obtain silver loaded zeolite particles, (ii) adding silver loaded zeolite particles to graphene oxide dispersion, ultrasonically stirring, spray drying the mixed solution to obtain graphene oxide coated silver loaded zeolite particle, (iii) uniformly mixing polypropylene powder and graphene oxide coated silver loaded zeolite particle powder, adding polyethyleneimine solution into mixed powder while stirring to form a paste, milling paste mixture to form uniform slurry, and (iv) placing mixed slurry in oven and drying to 80%, adding into grinding tool for extrusion molding and continue placing in oven until dry. USE - The material is useful in water purifying filter core (claimed). ADVANTAGE - The material solves the problem of easily peeling, scratching and amount of water discharge in water purification filter reverse osmosis membrane, and prolongs the life of reverse osmosis membrane filter and provides self-cleaning function. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for water purifying filter core, comprising casing, polypropylene cotton layer, activated carbon layer, graphene oxide composite filter material layer and reverse osmosis film layer arranged in order from the outside to inside, where the graphene oxide composite filter material layer is graphene oxide zeolite silver composite material.