微波法快速制备单分散纳米银溶胶  

Rapid Preparation of Monodisperse Nano-Silver Colloids Using Microwave Irradiation

作　　者：徐光年[1] 乔学亮[2] 邱小林[3] 陈建国[2] 

机构地区：[1]皖西学院安徽仿生传感与检测技术省级实验室,安徽六安237012 [2]华中科技大学,湖北武汉430074 [3]南昌理工学院,江西南昌330013

出　　处：《稀有金属材料与工程》2012年第3期531-534,共4页Rare Metal Materials and Engineering

基　　金：安徽省教育厅自然科学基金(KJ2007B161)

摘　　要：不添加任何还原剂,在PVP保护下通过微波辐射[Ag(NH3)2]OH络合物水溶液激发自由电子还原Ag+形成纳米银溶胶。UV-Vis吸收光谱测试表明,胶态纳米银粒子的吸光度随微波辐射时间的延长而增加,但最大吸收波长基本不变。当Ag+/PVP质量比为1:8,微波辐射时间为5min时,吸光度趋于稳定。TEM观测和图像分析结果表明,纳米银粒子的形貌为球形、单分散、平均粒径1.36nm、标准偏差0.54nm。The Ag^＋ were reduced to elemental silver by free-electron from microwave radiation [Ag（NH3）2]OH complex aqueous solution without any reducing agent, and the nano-silver sol was formed under the protection of PVP. UV-Vis absorption spectra show that the absorbance of the colloidal silver nanoparticles increases with the radiation time, but the maximal absorption wavelength does not change. The absorbance keeps stable when the microwave radiation time is up to 5 min at the mass ratio of Ag^＋/PVP=1：8. TEM observation and image analysis results show that the morphology of nano-silver particles are spherical and monodisperse, with an average diameter of 1.36 nm and the standard deviation of 0.54 nm.

关 键 词：[Ag(NH3)2]OH络合物 微波辐射 还原 单分散 纳米银溶胶 

分 类 号：TB383.1[一般工业技术—材料科学与工程]