▎ 摘　　要

NOVELTY - Preparing emulsion purifying filter screen comprises e.g. using improved Hummers method to prepare graphene oxide (GO), mixing graphene oxide and de-ionized water to obtain graphene oxide dispersion liquid, stirring and mixing the graphene oxide dispersion liquid and silver ammonia solution, pacing in water bath pot for reacting, then adding glucose aqueous solution, heating the water bath pot to, and continuously stirring and reacting, after the reaction solution is naturally cooled, washing and filtering for many times, then placing the precipitate in the vacuum under the vacuum to obtain the GO-Ag composite nano particle, using solvent to dilute the graphene oxide solution to obtain the graphene oxide solution, GO-Ag composite nano-particles, the graphene oxide solution and ascorbic acid are mixed uniformly, adding the mixed liquid after uniformly mixing into the mold, and placing the mold into the water bath pot. USE - The method is useful for preparing emulsion purifying filter screen. ADVANTAGE - The method: can prepares GOAg composite nanoparticles and adding them to the graphene aerogel, which ensures that the bacteria in the emulsion can be better killed; can oxidizes graphene aerogel i.e. activated and oxidized to improve oil absorption by preparing GOAg composite nanoparticles when particles are added to the graphene aerogel, and the bacteria in the emulsion can be better killed; and ensures that graphene aerogel is activated and oxidized to improve oil absorption. DETAILED DESCRIPTION - Preparing emulsion purifying filter screen comprises (i) using improved Hummers method to prepare graphene oxide (GO), mixing 10-1000 mg graphene oxide and 100-1000 ml de-ionized water to obtain graphene oxide dispersion liquid, stirring and mixing the graphene oxide dispersion liquid and silver ammonia solution, pacing in 20-70 degrees C water bath pot for reacting for 5-200 minutes, then adding 100-1000 ml glucose aqueous solution, heating the water bath pot to 85-100 degrees C, and continuously stirring and reacting for 5-200 minutes, after the reaction solution is naturally cooled, washing and filtering for many times, then placing the precipitate in the vacuum 20-80 degrees C for 10-100 hours under the vacuum to obtain the GO-Ag composite nano particle; (ii) using solvent to dilute the graphene oxide solution to obtain the graphene oxide solution with concentration of 0.01-100 mg/ml, GO-Ag compositenano-particles prepared in the step (i), the graphene oxide solution and ascorbic acid are mixed uniformly, adding the mixed liquid after uniformly mixing into the mold, then placing the mold into the water bath pot, heating to 50-100 degrees C, and keeping the temperature for 1-6 hours to obtain the graphene hydrogel; (iii) freezing graphene hydrogel prepared in the step (ii) and drying method to remove the water content in graphene hydrogel, obtaining the porous graphene aerogel; and (iv) performing activation-oxidation treatment to the graphene aerogel prepared in the step (iii).