▎ 摘　　要

NOVELTY - Preparation of graphene filter material involves using mixture of coal-based activated carbon, molecular sieve and/or activated carbon fiber as a porous carrier, performing powder removal treatment on the porous carrier, preheating the porous carrier, preparing graphene oxide aqueous solution by taking concentrated sulfuric acid and placing in corrosion-resistant reaction kettle, adding crystalline flake graphite to concentrated sulfuric acid and stirring, adding obtained solution to solution made by mixing potassium permanganate and nano-silver or nano-titanium dioxide, adding hydrogen peroxide to the solution, stirring, turning the solution from soil yellow to golden yellow, centrifuging the golden yellow solution to obtain a viscous yellow colloidal substance, placing the colloidal substance in sodium dodecylsulfonate solution and dispersing into a modified solution, and using the modified solution to modify the porous carrier. USE - Preparation of graphene filter material. ADVANTAGE - The method is capable of realizing function of sieving the porous carrier, and solving the problem that residual impurities on surface of the porous carrier and poort modification and processing effect of the porous carrier. DETAILED DESCRIPTION - Preparation of graphene filter material involves using mixture of one or more of coal-based activated carbon, molecular sieve or activated carbon fiber as a porous carrier, putting the porous carrier into inside of powder removal component and performing powder removal treatment on the porous carrier to reduce impact of impurities on the processing of activated carbon, putting the porous carrier after powder removal treatment into blast heater to preheat the porous carrier, preparing graphene oxide aqueous solution required for modification by taking 45-75 pts. wt. of 98% concentrated sulfuric acid and placing in 500 mL flask or other corrosion-resistant reaction kettle under ice-bath condition for 15-30 minutes, taking 10-30 pts. wt. crystalline flake graphite and slowly adding to concentrated sulfuric acid and stirring container under ice bath conditions for 35-60 minutes, slowly adding internal solution in the container to solution made by mixing 55-100 pts. wt. potassium permanganate and 2-6 pts. wt. nano-silver or nano-titanium dioxide and keeping the solution to stir, at this time the solution will gradually turn green, placing obtained solution in a water bath at 40℃, stirring and reacting for 11-20 hours until the solution turns into yellow viscous slurry and turning into a paste, removing the water bath after completely changing the substance into a paste, adding pure water to the solution in 3-5 times, where the amount of pure water added each time is 70-120 pts. wt., in the process of adding pure water, slowly adding under stirring conditions to avoid the temperature increase exceeding 80℃, heating the solution in water bath at 40℃ for 1-2 hours, and in the process of heating in the water bath, continuously stirring the solution, adding 35-50 pts. wt. of 30% hydrogen peroxide to the solution, stirring for 30 minutes, turning the solution from soil yellow to golden yellow and taking out the solution, centrifuging the golden yellow solution at a speed of 3500-4500 rpm for 10-30 minutes to obtain a viscous yellow colloidal substance, washing the colloidal substance with 5% dilute hydrochloric acid and distilled water successively, placing the colloidal substance in a 0.1-1 wt.% sodium dodecylsulfonate solution and dispersing into a modified solution with a content of 3-5% by ultrasonic waves, and using the modified solution to modify the porous carrier by spraying, heating and drying. An INDEPENDENT CLAIM is included for a graphene filter material preparation device, which includes powder removal component comprising a powder removal filter cartridge, where bottom of the powder removal filter cartridge is provided with a rotating base, a rotating sleeve is affixed to top of the rotating base, the powder removal filter cartridge is rotatably connected to inside the rotating sleeve, a driving motor is fixedly connected to side wall of the rotating sleeve, output end of the driving motor is fixedly connected with a driving gear, the side of the driving gear is meshed with a driven gear, the driven gear is arranged at a position corresponding to center of the powder removal filter cartridge, the side of the driven gear is fixedly connected with fan blades through the rotating shaft, pushing teeth meshed with the driving gear are fixedly connected to inner side wall of the powder removal filter cartridge, filter screen frames are fixedly connected between the fan blades and the inner cavity of the powder removal filter cartridge, and a filter screen is fixedly connected between the filter screen frames, a feed port and a discharge port are provided on other side wall of the powder removal filter cartridge, guide blocks are fixedly connected to the side wall of the powder removal filter cartridge, guide grooves corresponding to the guide blocks are opened inside the rotating base and the rotating sleeve, and a powder collecting box is slidably connected to inside the rotating base.