纳米银粒子的化学法制备及其表征

Chemical Preparation and Characteristic of Silver Nanoparticles

采用化学还原法制备纳米银粒子,制备过程先后使用两种保护剂,用聚乙烯吡咯烷酮(PVP)作保护剂、N,N二甲基甲酰胺(DMF)作还原剂,还原硝酸银溶液得到纳米银粒子.该体系的还原主要通过煮沸法进行;以聚乙二醇(PEG)作为保护剂、还原剂、稳定剂和反应介质,还原硝酸银溶液得到纳米银粒子,并且对所制备的纳米银粒子分别用紫外光谱、荧光光谱、X射线衍射、做了详细地表征.

Silver nanoparticles were synthesized by using two stabilizer.In the case of using PVP as a stabilizer,silver nanoparticles were synthesized by boiling AgNO_3 in N,Ndimethyl formamide.Mixing the AgNO_3 and polyethylene glycol in the dark,silver nanoparticles were got due to the stabilization and reduction of polyethylene glycol.At last,silver nanoparticles were exactly characterized by UVVis spectrophotometry,fluorescence spectroscopy and XRD analysis.