具有核壳结构的纳米二氧化钛负载银离子掺杂稀土离子抗菌剂的合成、表征及抑菌活性研究  

Synthesis,Characterization and Antibacterial Properties of Core-shell Structure Ag^+-Loaded Nano-Titania Doped with Rare Earth Ion Antibacterial Agent

作　　者：徐燕鸣[1] 郁慧[1] 何其庄[1] 夏庆春[1] 

机构地区：[1]上海师范大学生命与环境科学学院,上海200234

出　　处：《稀土》2009年第2期65-70,共6页Chinese Rare Earths

基　　金：上海市科学技术委员会项目资助(0652nm045)

摘　　要：以纳米TiO2粉体和硝酸银及稀土硝酸盐(RE=Ce4+、La3+、Nd3+、Sm3+、Er3+)为原料,采用浸渍法制备了5种具有核壳结构的纳米二氧化钛负载银离子掺杂稀土离子抗菌剂。通过固体紫外-可见光谱、X-射线粉末衍射光谱、X-Ray光电子衍射光谱、透射电镜分析证明掺杂Ce4+的抗菌剂具有核壳结构。采用培养基扩散法、营养肉汤稀释法及贴膜试验对这五种抗菌剂进行了抑菌活性研究,最终证明其具有很好的抑菌性。With nano- titania and AgNO3 and rare earth nitrate （RE=Ce^4＋、La^3＋、Nd^3＋、Sm^3＋、Er^3＋）as raw materials, five kinds of core - shell structure Ag^＋ - loaded nano - titania doped with rare earth ion antibacterial agents have been prepared by the impregnation technique.The core- shell structure has been verified by UV- Vis,XRD,XPS,TEM in the Ag ＋ - loaded nano- titania doped with Ce^4＋ antibacterial agent. Outstanding antibacterial activities of the five core - shell antibacterial agents have been studied and vervified.

关 键 词：核壳结构抗菌剂 纳米二氧化钛 银 稀土 抑菌活性 

分 类 号：S482.2[农业科学—农药学] O614.33[农业科学—植物保护]