摘要
采用银晶种为引导剂,以高浓度硝酸银溶液为银源,乙二醇为还原剂,聚乙烯吡咯烷酮为盖帽剂,大规模制备银纳米棒。用扫描电镜,元素分析和X射线衍射对银纳米棒进行表征。结果表明,通过预加银晶种的方式替代添加金属盐类,最佳的反应条件为:搅拌速度为350 r/min,反应温度为160℃,硝酸银浓度不高于0.50mol/L,采取体积放大6倍高浓度硝酸银制备银纳米棒时,需要提高银晶种的浓度为9.81 mmol/L,PVP/AgNO3摩尔比为1.3,该方法利用银晶种的引导作用,调控硝酸银的还原速度使之与银纳米棒的生长速度相匹配。
Silver nanorods were prepared in large scale by using silver crystal as guide agent,high concentration of silver nitrate solution as silver source,ethylene glycol as reducing agent,polyethylene pyrrolidone as cap agent.The prepared silver nanorods were characterized by scanning electron microscope,Elemental analysis and X-ray diffraction.The results showed that the optimum preparation conditions for the method by pre-adding silver seeds are:stirring speed of 350 r/min,reaction temperature of 160℃,silver nitrate concentration of not more than 0.50 mol/L.When the volume of silver nitrate solution is enlarged by 6 times,the concentration of silver seed needed to improve to 9.81 mmol/L,and the molar ratio of PVP/AgNO3 was 1.3.The method utilizes the guiding action of silver seeds to regulate the reduction rate of silver nitrate to match the growth rate of silver nanorods.
作者
陈勇
官建国
谭晓明
朱琼
谢洪泉
CHEN Yong;GUAN Jianguo;TAN Xiaoming;ZHU Qiong;XIE Hongquan(College of Chemical Engineering and Pharmacy,Jingchu University of Technology,Jingmen 448000,Hubei,China;State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China;Hubei Benxin Environmental Protection Hi-tech Co.Ltd.,Wuhan 430074,China;Department of Chemistry,Huazhong University of Science and Technology,Wuhan 430074,China)
出处
《贵金属》
CAS
CSCD
北大核心
2018年第4期32-38,共7页
Precious Metals
基金
荆楚理工学院引进人才启动项目(QDB201604)
荆楚理工学院大学生创新创业训练项目(KC2016012
KC2017010)
湖北省教育厅科学研究计划指导性项目(B2017250)
荆门市科技计划项目(2018YFYB048)
湖北省大学生创新创业训练项目(201611336016
201711336006)
关键词
金属材料
银纳米棒
银晶种
多元醇
制备条件
metallic materials
silver nanorod
silver seed
polyol
preparation condition
