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化学学报
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化学学报 ›› 2004, Vol. 62 ›› Issue (12): 1158-1161. 上一篇    下一篇

研究论文

以树形分子为模板制备银纳米颗粒

李国平, 罗运军, 谭惠民   

  1. 北京理工大学材料科学与工程学院, 北京, 100081
  • 投稿日期:2003-10-09 修回日期:2004-02-20 发布日期:2014-02-17
  • 通讯作者: 罗运军,E-mail:yjluo@bit.edu.cn E-mail:yjluo@bit.edu.cn
  • 基金资助:
    教育部跨世纪优秀人才基金和国防科工委基础研究计划资助项目(No.J1500E002).

Preparation of Silver Nanoparticles Using Dendrimer as Template

LI Guo-Ping, LUO Yun-Jun, TAN Hui-Min   

  1. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081
  • Received:2003-10-09 Revised:2004-02-20 Published:2014-02-17

PDF

770

被引次数

167

以硝酸银为原料,硼氢化钠为还原剂,PAMAM树形分子为模板兼稳定剂,制备出粒径分布范围在4～7 nm的银纳米颗粒.实验发现,其他条件相同时,银纳米颗粒的粒径随着Ag+/树形分子摩尔比的增加而增加,并且树形分子代数越高,所起的模板作用越显著.还研究了溶液pH值的影响,发现当溶液pH值在7左右时,可以制得粒径较小、分散性较好的银纳米颗粒.用紫外-可见光谱,透射电镜(TEM)以及原子力显微镜(AFM)等测试手段对所制得的银纳米颗粒进行了表征.

关键词: PAMAM树形分子, 模板合成, 银纳米颗粒, 树形分子纳米复合材料

In this paper, we prepared Ag nanoparitcles with a diameter of 4～7 nm by reduction of AgNO3 with NaBH4 in the presence of PAMAM dendrimer as template. When the other conditions were identical, the size of particles increased with the increase of the molar ratio of Ag+ to dendrimer and when the generation of dendrimer was too higher, its role as template was more remarkable. The influence of pH of solution on the structure of nanoparticales was studied and the results showed that when pH was at 7.0±0.3, the silver nanoparticles which are well-stabilized with well-degree of dispersion and smaller in diameter, can be obtained. The silver nanoparticles were characterized by UV-visible absorption, transmission electron microscopy (TEM), automatic force microscope (AFM) and as well.

Key words: poly(amidoamine)(PAMAM)dendrimer, template, silver nanoparticle, dendrimer nanocomposite