▎ 摘　　要

NOVELTY - A silver/ceria/graphene aerogel is obtained by dispersing silver and ceria nanoparticles in three-dimensional porous graphene aerogel, subjecting mixture to photocatalytic degradation of dye molecules and antibacterial sterilization dual function, dispersing and loading ceria-and-silver nanoparticles in carrier, controlling mixture by dilution-concentration process and two-step reduction method. The small size of assembly of nano-silver particles and three-dimensional porous structure is controlled. USE - Silver/ceria/graphene aerogel is used for nanomaterial, catalytic material and biological material. ADVANTAGE - The silver/ceria/graphene aerogel has excellent antibacterial property. DETAILED DESCRIPTION - A silver/ceria/graphene aerogel is obtained by dispersing silver and ceria nanoparticles in three-dimensional porous graphene aerogel, subjecting mixture to photocatalytic degradation of dye molecules and antibacterial sterilization dual function, dispersing and loading ceria-and-silver nanoparticles in carrier, controlling mixture by dilution-concentration process and two-step reduction method. The small size of assembly of nano-silver particles and three-dimensional porous structure is controlled. The material adsorbs dye molecules in three-dimensional porous graphene with strong adsorbent. The adsorbed dye molecules are degraded using ceria nanoparticle photocatalyst. The bioactivity of small-sized nano-silver particles is used to achieve antibacterial and bactericidal properties. An INDEPENDENT CLAIM is included for preparation of silver/ceria/graphene aerogel, which involves preparing silver ion (Ag+)/ceria/graphene precursor by dilution-concentration method and adding ceria sol and silver nitrate aqueous solution to aqueous solution of graphene oxide and magnetically stirring mixture, diluting silver ion/ceria/graphene oxide precursor with deionized water and ultrasonically dispersing mixture to obtain diluted precursor, centrifuging diluted precursor to obtain silver ion/ceria/graphene oxide precursor with high concentration and ultrasonically dispersing mixture to obtain precursor (p1), preparing silver ion/ceria/graphene aerogel by ultrasonically chemical assisted reducing and gelating mixture under continuous ultrasonic condition, adding predetermined amount of strong reducing agent comprising sodium borohydride to precursor (p1), subjecting mixture to ultrasonic chemical assisted reaction, to obtain silver ion/ceria/graphene aqueous solution, adding ascorbic acid to silver ion/ceria/graphene aqueous solution, ultrasonically dispersing mixture, sealing solution and placing mixture in water bath, maintaining mixture at 90 degrees C for 4 hours to obtain hydrogel and freeze-drying hydrogel.