▎ 摘　　要

NOVELTY - Magnetically separable ferroferric oxide/phosphorized graphene complex nanomaterial, is claimed. The complex nanomaterial is prepared by e.g. (i) ultrasonically dispersing graphene oxide to the mixed solution of anhydrous tetrahydrofuran and triethylamine to obtain oxidized graphene suspension in ice water bath, (ii) adding mixed solution of anhydrous tetrahydrofuran and phosphorus trichloride, stirring and refluxing, cooling, and ultrasonically dispersing filter cake with water, (iii) hydrolyzing the obtained dispersion, ultrasonically dispersing in water to obtain fluffy powdered phosphorylated graphene, (iv) adding anhydrous sodium acetate to form mixture of polyethylene glycol 600, adding stearic acid, ferric chloride hexahydrate, ferric chloride tetrahydrate to form mixed ionic solution, (v) dispersing ultrasonically with absolute ethanol, cooling, washing until the washing liquid is colorless, separating by using magnet and vacuum drying. USE - The complex nano material is useful for enrichment and recovery of rare earth gadolinium ions (claimed). ADVANTAGE - The material: has high-efficiency adsorption of gadolinium ions and recycling of adsorbent materials. DETAILED DESCRIPTION - Magnetically separable ferroferric oxide/phosphorized graphene complex nanomaterial, is claimed. The complex nanomaterial is prepared by (i) ultrasonically dispersing graphene oxide to mixed solution of anhydrous tetrahydrofuran and triethylamine according to volume ratio of 1-2 to obtain oxidized graphene suspension in ice water bath, (ii) adding mixed solution of anhydrous tetrahydrofuran and phosphorus trichloride according to volume ratio of 5-10 to obtain graphene oxide suspension, stirring at 80-90 degrees C for 12-36 hours, cooling and adding water to centrifuge to obtain clear filterate , ultrasonically dispersing the filter cake with water, (iii) hydrolyzing the obtained dispersion is at 60-70 degrees C for 1-2 hours, adjusting the pH value at 5-8 with 1 mol/l sodium hydroxide solution, washing and filtering, ultrasonically dispersing in water to freeze-drying to obtain fluffy powdered phosphorylated grapheme, (iv) adding anhydrous sodium acetate to the water to form uniform mixture of polyethylene glycol 600, adding stearic acid, ferric chloride hexahydrate, ferric chloride tetrahydrate to form mixed ionic solution, and (v) dispersing ultrasonically with absolute ethanol to obtain phosphorylated graphene, obtain dispersion is added to the mixed ionic solution for hydrothermal reaction at 150-180 degrees C for 6-8 hours, cooling at room temperature, washing with deionized water and absolute ethanol until the washing liquid is colorless, separating by using magnet, and vacuum drying at 50-70 degrees C for 12-24 hours.