单分散球形纳米银粒子的制备新方法及其抗菌性能  

New Method about the Preparation of Single Dispersion Spheric Silver Nanoparticles and Its Antibacterial Property

作　　者：徐光年[1] 乔学亮[1] 邱小林[2] 陈建国[1] 

机构地区：[1]华中科技大学 [2]南昌理工学院,江西南昌330013

出　　处：《稀有金属材料与工程》2008年第9期1669-1672,共4页Rare Metal Materials and Engineering

基　　金：安徽省教育厅自然科学基金项目(KJ2007B161)

摘　　要：通过紫外光照射[Ag(NH3)2]+溶液激发光电子还原Ag+为单质银,不添加任何还原剂,在PVP的保护下形成纳米银溶胶。UV-Vis吸收光谱测试表明,胶态的纳米银粒子的吸光度随紫外照射时间的延长而增加,但最大吸收波长不变,当照射时间达12h时,吸光度值趋于稳定。TEM观测结果表明,纳米银粒子的形状为球形、单分散、粒径5nm左右。抗菌性能测试表明,当纳米银粒子浓度为5μg/mL时,对大肠杆菌的杀灭率达100%。The Ag^＋ were reduced to Ag by photoelectron from Ultra-Violet radiation Ag（NH3）^2＋ solution and without any reducing agent, the silver nanoparticles sol was formed with the protection of PVP. UV-Vis absorption spectrum showed that the absorbance of the colloidal silver nanoparticles increased with the radiation time, but the maximal absorption wavelength did not change, the absorbance kept stable when the radiation time was more than 12 hours. TEM showed that silver nanoparticles were spherical shape, single dispersion and about 5 nm in particle size. The antibacterial property of the silver nanoparticles indicated the E.coli was completely killed when the concentration of the silver nanoparticles was 5 μg/mL

关 键 词：银氨络离子 光电子 还原 纳米银 抗菌 

分 类 号：O614.122[理学—无机化学]