摘要
以DMAc为溶剂和还原剂,高分子量PVP为稳定剂,在中温条件下制备稳定、高度分散且均匀细小的球形金属银纳米粒子(AgNPs)。运用X射线衍射分析(XRD)、红外光谱(FT-IR)、紫外光谱(UV-vis)和透射电镜(TEM)等表征方法,研究纳米粒子的化学结构、形貌、尺寸分布、光学性质和抗菌性能。结果表明:所制备的银纳米粒子为面心立方结构,其尺寸分布均匀,并且能稳定存在于溶液中。通过控制反应时间和PVP与AgNO3的摩尔比,可得到不同粒径的球形银纳米粒子。采用纸片法测试抗菌性能,发现制得的银纳米粒子浓度达到0.5μg/m L时,对金葡萄球菌的抑菌和抗菌作用非常明显,亦即该研究已制备出绿色环保、反应条件温和、抗菌性能良好的银纳米粒子。
To further explore the antimicrobial properties of Ag nano particles （AgNPs）, the well monodispersed AgNPs were synthesized through reducing silver nitrite by N, N-dimethylacetamide （DMAc） solvent with high-molecular-mass fraction PVP at mildly temperature. In the present study, different reducing agents and protective agents were used to prepare silver nanoparticles using chemical reduction. The morphologies of silver nano particles （AgNPs） were characterized by XRD, FTIR, UV, and TEM. The antibacterial properties of the samples were also studied. The results show that the obtained AgNPs have a face-centered cubic crystalline structure and significant stability in solvent. The antimicrobial properties of AgNPs were tested by disk diffusion method. The results illustrate that AgNPs have a remarkable antimicrobial and antibacterial effects on Staphylococcus aureus when the concentration increases to 0.5 μg/mL. The prepared AgNPs have the advantages of environment protection, mild reaction conditions and excellent antimicrobial properties.
出处
《粉末冶金材料科学与工程》
EI
北大核心
2015年第4期555-561,共7页
Materials Science and Engineering of Powder Metallurgy
基金
湖南省自然科学基金资助项目(10JJ5057)
