水相中银纳米粒子的制备及动力学行为研究  

Preparation and Kinetics Behavior Study of Silver Nanoparticles in Aqueous Phase

作　　者：陈延明[1] 韩娇[1] 

机构地区：[1]沈阳工业大学石油化工学院,辽阳111003

出　　处：《材料导报（纳米与新材料专辑）》2012年第2期69-71,88,共4页

基　　金：辽宁省科技厅博士基金(200644)

摘　　要：以油酸钠为表面活性剂、AgNO3为前驱剂、N,N-二甲基甲酰胺(DMF)为还原剂,在水相体系制备银纳米粒子。采用紫外-可见分光光度计测定了不同反应时间银纳米粒子的吸收曲线,系统地考察了反应温度以及DMF加入量等因素对银纳米粒子生成过程动力学行为的影响。结果表明,未加DMF时,该反应体系不能生成银纳米粒子,随着DMF加入量的增加和反应温度的升高,体系中银纳米粒子的吸收强度逐渐增大,在100℃、DMF加入量为3mL时,银纳米粒子的吸收强度大幅度提高。透射电子显微镜的结果表明,所得的银纳米粒子具有球形形貌,且具有较窄的尺寸分布。Silver nanoparticles were synthesized by using sodium oleate as stabilizer, silver nitrate as precursor and N, N-dimethylformamide as ruductant in aqueous phase. The kinetic process for the formation of silver nanoparti- cles were studied by changing reaction temperature and DMF addition amounts, and with the aid of UV-vis absorption spectrum measurement at different reaction time. The results show that silver nanoparticles could not be obtained if DMF are not added. The absorption strength increases as the reaction temperature and DMF addition amounts in- crease, and the absorption strength increases remarkably when the reaction temperature reaches 100℃ and DMF a- mount is 3mL. TEM results show that the obtained silver nanoparticles exhibit spherical morphology with narrow size distribution.

关 键 词：银纳米粒子 油酸钠 动力学行为 

分 类 号：TQ326[化学工程—合成树脂塑料工业]