摘要
本论文采用多元醇还原法制备出形貌均匀的银纳米线,并详细讨论了PVP与硝酸银物质的量比、卤化物Fe Cl3、温度对银纳米线生长的影响。结果表明:PVP浓度适量能够有效抑制银纳米线侧向生长,形成较细较长的银纳米线。Fe3+能够消耗银纳米线表面的氧,也可去除吸附在银颗粒上的氧气;Cl-能够有效的均衡反应前期和后期体系中的Ag+浓度,有利于形成形貌均一的银纳米线。反应温度过低难以形成银纳米线;温度升高,银纳米线直径和长度增加;温度过高时由于银晶体粒子的团聚明显,银纳米线产率严重下降。
The synthesis of silver nanowires is dicussed by investigating the growth mechanisms for silver nanowires produced through polyol process. Experimental parameter, such as the molar ratio between poly-（vinylpyrrolidone）（PVP, the capping agent） and AgNO3, salt precursor FeCl3, and temperature were found to affect the growth of silver nanowires. Moderate concentration of PVP can promote the anisotropic growth for silver. Fe（ Ⅲ） removes atomic oxygen from the surface of silver nanostructures. Reduction by polyol glycol competes with oxidation by atomic oxygen to form an equilibrium. The CI（ Ⅰ ） could equilibrate the Ag（ Ⅰ） concentration during the reaction process. Both the Fe（ Ⅲ） and CI（ Ⅰ） could attribute to the uniformity of silver nanostructure. At elevated reaction temperatures, the lengths of silver nanowires increased. When the temperature is too high, the lengths of AgNWs are nonuniformity and the yield of AgNWs decrease.
出处
《信息记录材料》
2017年第7期194-196,共3页
Information Recording Materials
