▎ 摘　　要

NOVELTY - Preparing double-channel 3D graphene ball using chemical vapor deposition (CVD) method comprises e.g. (i) respectively adding sodium carbonate particles and magnesium chloride particles into de-ionized water, stirring uniformly, slowly dripping sodium carbonate solution into magnesium chloride solution under stirring, and filtering the obtained milk-white magnesium carbonate solution, washing with deionized water, repeating for three times, spraying and drying the obtained solution to obtain powder particles, (ii) placing the powder particles in muffle furnace for pre-treat, carrying out CVD catalysis, introducing argon in the whole process, introducing acetonitrile, changing carbon source, closing acetonitrile, introducing methane, and naturally cooling to room temperature, and (iii) etching the sample by hydrochloric acid, removing the impurity, repeatedly etching and washing for 3 times, filtering and drying to obtain 3D graphene powder. USE - The double-channel 3D graphene ball is useful in the milk liquid separation. ADVANTAGE - The graphene ball has good reusability, is cycled 10 times, has high-efficiency emulsion separation ability, recovers toxic and volatile oils and organic solvents, and solves environmental pollution caused by the experiment. The graphene material has emulsion separation efficiency of not greater than 95%. DETAILED DESCRIPTION - Preparing double-channel 3D graphene ball using chemical vapor deposition (CVD) method comprises (i) respectively adding sodium carbonate particles and magnesium chloride particles into de-ionized water, stirring uniformly, slowly dripping sodium carbonate solution into magnesium chloride solution under stirring, and filtering the obtained milk-white magnesium carbonate solution, washing with deionized water, repeating for three times, spraying and drying the obtained solution to obtain powder particles, (ii) placing the powder particles in muffle furnace for pre-treat, carrying out CVD catalysis, introducing argon in the whole process, introducing acetonitrile, changing carbon source, closing acetonitrile, introducing methane, and naturally cooling to room temperature, (iii) etching the sample by hydrochloric acid, removing the impurity, repeatedly etching and washing for 3 times, filtering and drying to obtain 3D graphene powder, (iv) mixing the oil and water in a volume ratio of 1: 9, stirring at 25-30degrees Celsius for 2 hours to obtain non-surfactant oil water emulsion, dissolving sodium dodecyl sulfate (SDS) in water as emulsifier, adding the related oil into water, where the volume ratio of oil and water is 1: 99, stirring at 25-30degrees Celsius for 1 hours to obtain oil-water emulsion with stable surfactant, and (v) adding the two kinds of emulsion obtained in step (iv) into 3D graphene powder, stirring for 10 minutes, filtering, and observing the emulsion separation effect.