PVP作为保护剂制备Ag纳米粒子

摘要

With PVP as dispersing agent and protective agent,and ethanol and macromolecular polyethy-lene glycol(PVA)as a reducing agent to prepared silver nanoparticles. By controlling the experiment time,PVP and PVA and the concentration of silver nitrate concentration,at 90 ℃ and under reflux condi-tions to obtained Ag nanoparticles. The structure of the polymer was characterized by a Fourier transform infrared spectroscope,the effect of size distribution by UV-visible spectra characterization of reactant con-centration on the preparation of size distribution of silver nanoparticles,using transmission electron micro-scopic to observed silver nanoparticles and polymer networkes morphology,by using X-ray diffraction to analysed crystal structure of nanosilver nanoparticles.%以聚乙烯吡咯烷酮（ PVP）为分散剂和保护剂，分别用乙醇和高分子化合物聚乙烯醇（ PVA）作还原剂制备银纳米粒子，通过控制反应时间、PVP和PVA的含量及硝酸银的浓度，在90℃回流条件下得到纳米银颗粒。采用红外光谱对聚合物结构进行表征，紫外-可见光谱表征反应物浓度对制备银纳米粒子尺寸分布的影响，扫描电镜观察纳米粒子和聚合物网络形貌，X射线衍射分析银纳米粒子的晶体结构。