A novel and facile wet-chemical method for synthesis of silver microwires  

一种新颖、简单的银微米线的湿化学制备方法(英文)

作　　者：翟爱霞[1] 蔡雄辉[2] 姜晓晔[2] 范国枝[1] 

机构地区：[1]武汉工业学院化学与环境工程学院,武汉430023 [2]武汉工业学院生物与制药工程学院,武汉430023

出　　处：《Transactions of Nonferrous Metals Society of China》2012年第4期943-948,共6页中国有色金属学报（英文版）

基　　金：Project (2011CDC114) supported by the Hubei Provincial Natural Science Foundation of China

摘　　要：A novel and facile wet-chemical method for synthesis of silver microwires was developed.The well-defined particles were prepared by adding an iron（Ⅱ） sulfate heptahydrate solution into a silver nitrate solution containing citric acid drop by drop at 50 °C.The resulting products were characterized by scanning electron microscopy and X-ray diffraction.It was found that the particles consisted of numerous silver microwires.The reaction temperature greatly affected the morphologies of the as-prepared particles.Both of the mean length and width of the silver microwires increased with the decrease of the concentration of silver nitrate.And the lower concentration was unfavorable for the formation of more silver microwires.Similar findings were also observed when the concentration of iron（Ⅱ） sulfate was decreased.The amount of citric acid also greatly affected the shape of the as-prepared particles.It was concluded that citric acid was the key role in the formation of silver microwires via the Oswald ripening mechanism.提供一种新颖简单的银微米线的湿化学制备方法。在反应温度为50℃的条件下,把硫酸亚铁溶液逐渐滴加到含有柠檬酸的硝酸银溶液中,合成银微晶体。采用扫描电镜(SEM)和X射线衍射仪(XRD)对所制备的银微晶体进行表征。结果表明:所制备的银微晶体主要由大量的银微米线组成;银微晶体的形态与反应温度有很强的联系;当硝酸银浓度降低时,银微米线的长度和直径都逐渐增大,且较低的硝酸银浓度不利于生成更多的银微米线。降低硫酸亚铁浓度时也出现类似的结果。柠檬酸的用量对银微晶体的微观形态有很大的影响。根据银微米线的形成机理,推断柠檬酸在Oswald熟化形成银微米线的过程中起着非常重要的作用。

关 键 词：silver microwires iron（Ⅱ） sulfate heptahydrate citric acid wet-chemical method 

分 类 号：O614.122[理学—无机化学] TB383.1[理学—化学]