关键词: 白炭黑;锌;铕;无机抗菌材料;杀菌率

Abstract: Zinc-europium antimicrobial white carbon black was prepared by sol-gel method.The product is a new kind of inorganic antimicrobial material containing rare earth europium ions.Compared with the single-loading zinc-containing antimicrobial white carbon black,the antibacterial property of the new inorganic antimicrobial was more remarkable.The effects of concentration of zinc ion,concentration of europium ion and reaction time on the bactericidal rate were investigated by single factor experiments.The optimum preparation conditions were obtained: the concentration of zinc ion was 0.8 mol·L-1,europium ion was 0.005 mol·L-1 and the reaction time was 1 h.The zinc-europium-antimicrobial white carbon black with excellent antibacterial properties was prepared under the optimum conditions and characterised though FTIR,SEM and ICP-OES.FTIR results show that the addition of zinc ions and europium ions don't change the basic structure of the carrier silica.SEM and ICP-OES analysis show that zinc-europium antimicrobial silica has smaller particle size,better dispersibility and both zinc and europium ions are supported on the carrier silica.

Key words: white carbon black;zinc;europium;inorganic antibacterial material;sterilizing rate