▎ 摘　　要

NOVELTY - Preparing lanthanum-loaded graphene aerogel phosphorus adsorbent comprises preparing hydrated lanthanum oxide sol comprising (i) dissolving lanthanum nitrate hexahydrate in deionized water, obtain lanthanum nitrate hexahydrate solution, introducing aqueous ammonia dropwise to the lanthanum(III) nitrate solution, introducing hydrated lanthanum oxide powder to deionized water and sonicating, obtaining hydrated lanthanum oxide sol, and (ii) centrifuging milky white solution, preparing lanthanum-loaded graphene aerogels by (a) introducing sodium ascorbate to the graphene oxide aqueous solution and dissolving, introducing hydrated lanthanum oxide sol, stirring well, (2) introducing sodium hydroxide solution dropwise to obtain mixed solution after adjusting the pH, (3)a graphene hydrogel loaded with hydrated lanthanum oxide is obtained, (iv) washing graphene hydrogel loaded with hydrated lanthanum oxide several times with deionized water and ethanol successively, and freeze-drying. USE - The method is useful for preparing lanthanum-loaded graphene aerogel phosphorus adsorbent. ADVANTAGE - The method overcomes problem of existing powder adsorbent has low utilization rate, small adsorption amount, easy to flow loss, difficult to recycle and solve the problem of the existing lanthanum load method is not uniform, lanthanum ion is easy to dissolve, and complex preparation method. DETAILED DESCRIPTION - Preparing lanthanum-loaded graphene aerogel phosphorus adsorbent comprises (i) preparing hydrated lanthanum oxide sol comprising (i) dissolving lanthanum nitrate hexahydrate in deionized water, obtain lanthanum nitrate hexahydrate solution, under stirring conditions and in an ice-water bath, introducing aqueous ammonia dropwise to the lanthanum(III) nitrate solution until the pH was 9-11 to obtain a milky white solution, (ii) centrifuging milky white solution to obtain a white precipitate, washing white precipitate and freeze-dried to obtain hydrated lanthanum oxide powder, (iii) introducing hydrated lanthanum oxide powder to deionized water and sonicating, obtaining hydrated lanthanum oxide sol; where mass ratio of the hydrated lanthanum oxide powder to the volume of deionized water is 1 g: 100-200 ml, (ii) preparing lanthanum-loaded graphene aerogels by (a) introducing sodium ascorbate to the graphene oxide aqueous solution and dissolving, introducing hydrated lanthanum oxide sol, stirring well at room temperature to obtain mixed solution, where the concentration of described graphene oxide aqueous solution is 1-5mg/l, the volume ratio of described graphene oxide aqueous solution and hydrated lanthanum oxide sol is 1:0.2-0.5; the volume of described graphene oxide aqueous solution and the mass ratio of sodium ascorbate are 1 ml: 5-15 mg; (2) introducing sodium hydroxide solution dropwise to the mixed solution until the pH is 11-12 to obtain the mixed solution after adjusting the pH, (3) Under the condition of temperature of 80-90degrees Celsius, the pH-adjusted mixed solution was heated for 3-5 hours, A graphene hydrogel loaded with hydrated lanthanum oxide is obtained, (iv) washing graphene hydrogel loaded with hydrated lanthanum oxide several times with deionized water and ethanol successively, and freeze-drying.