芒果皮提取物合成纳米银及抑菌性研究

以芒果皮提取物作为还原剂,采用生物法合成纳米银粒子。研究了合成过程中pH值、芒果皮提取物添加量和硝酸银浓度对合成粒径和形貌的影响,研究结果通过紫外可见分光光度法、X射线衍射和透射电镜进行了表征。通过表征,分析得到合成的纳米银的粒径介于7～27nm之间,其结晶为立体对称晶体,pH值为11,芒果皮提取物的添加量为0.1mL,硝酸银溶液浓度为0.5mM,反应条件为80℃,水浴15min时,合成的纳米银粒径最小。试验结果表明,生物合成的纳米银粒子的抗菌性良好。

Mango Peel Extract Mediated Novel Route for Synthesis of Silver Nanoparticles and Antibacterial Application of Silver Nanoparticles

Silver nanoparticles were successfully synthesized from aqueous silver nitrate through a simple green route using the extract of mango peel as a reducing as well as capping agent.The effects of various operational parameters,such as pH value,the amount of the mango peel extract and the content of silver nitrate on the synthesis of the particle size and morphology were investigated.The results from UV-vis spectrum,X-ray diffraction(XRD),and Transmission electron microscope(TEM) revealed that the biosynthesized silver nanoparticles are in the size range of 7-27 nm and are crystallized in the centered cubic symmetry.When the reaction conditions were at pH 11.0 with 0.1 mL of the extract,0.5 mM silver nitrate concentration and 80 ℃ incubation temperature for 15 min,silver nanoparticles were in minimum size.Further,the antibacterial activity of these biologically synthesized silver nanoparticles was studied and the results showed that biosynthesized silver nanoparticles displayed excellent antibacterial function.