▎ 摘　　要

NOVELTY - Preparing graphene cigarette smoke filter screen comprises (a) dispersing graphene oxide in water to form a graphene oxide solution, adding calcium chloride and sodium carbonate to the graphene oxide solution, mixing, reacting, adding ethanol, ammonia and ethylenediamine, reacting at 90-100 degrees C for 5-6 hours, adding hydrochloric acid, filtering, washing, drying to obtain porous graphene, (b) taking sodium hydroxide aqueous solution, adding terephthalic acid, stirring evenly, adding nickel ion salt solution, reacting at 50-100 degrees C for 4-5 hours, filtering, drying to obtain nickel metal organic framework solution, (c) taking activated carbon, porous graphene and nickel metal organic framework solution, mixing, stirring uniformly to obtain a mixed solution and (d) taking the honeycomb-shaped polypropylene substrate, placing in the mixed solution, soaking for 2-3 days, taking out substrate, allowing to stand for 30-60 minutes and drying to obtain the graphene cigarette smoke filter screen. USE - The method is useful for preparing graphene cigarette smoke filter screen. ADVANTAGE - The method ensures that the porous graphene and the nickel metal organic framework material with a large specific surface area adsorb a large amount of harmful gases, tar and heavy metals; decomposes harmful substances through catalysis; improves the filtration efficiency; extends the life cycle; reduces the amount of harmful substances in cigarette smoke through physical adsorption and chemical catalytic decomposition, where the amount of tar is reduced by 85%, the benzopyrene is 45.45%, the lead is 74.1%, the arsenic is 50% and the cadmium is 50%. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for filter screen obtained by the method for preparing a graphene cigarette smoke filter.