物理化学学报 >> 2006, Vol. 22 >> Issue (04): 513-516.doi: 10.3866/PKU.WHXB20060424

研究简报 上一篇    

微波法合成纳米金胶体颗粒的调控研究

杨立平;涂伟霞   

  1. 北京化工大学化学工程学院分子与材料模拟实验室, 纳米材料先进制备技术与应用科学教育部重点实验室, 北京 100029
  • 收稿日期:2005-09-19 修回日期:2005-11-16 发布日期:2006-04-10
  • 通讯作者: 涂伟霞 E-mail:tuwx@mail.buct.edu.cn

Studies on Au Colloidal Nanoparticles Synthesized by Microwave Irradiation

YANG Li-Ping;TU Wei-Xia   

  1. Key Laboratory for Nanomaterials of Ministry of Education, Division of Moleoular and Materials Simulation, Department of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China
  • Received:2005-09-19 Revised:2005-11-16 Published:2006-04-10
  • Contact: TU, Wei-Xia E-mail:tuwx@mail.buct.edu.cn

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摘要： 用微波法制备高分子聚合物稳定的纳米金胶体颗粒, 制得的金纳米颗粒的平均粒径在5～120 nm之间. 考察了醇还原剂以及碱对金颗粒形成的影响, 使用透射电子显微镜、紫外可见分光光度计进行表征. 结果表明, 微波法制备的金胶体颗粒具有粒径小、分散性好的特点. 金颗粒的尺寸和形状随醇还原剂的种类及碱(NaOH)用量的不同而有明显的变化. 紫外可见吸收光谱表明, 在反应物中加入碱的体系, 金颗粒的形成速度明显加快, 且利于圆球形金颗粒的形成.

关键词: 微波法, 纳米颗粒, 金胶体, 聚乙烯基吡咯烷酮(PVP)

Abstract: Polymer-stabilized Au colloidal nanoparticles were prepared by microwave irradiation. Size of the Au particles varied from 5 nm to 120 nm along with different reactive conditions. Effects of the alcohol reducing agent and NaOH on particle size and shape were investigated. The prepared Au nanoparticles were characterized by transmission electron microscope (TEM) and ultraviolet-visible (UV-Vis) spectrophotometer. The Au nanoparticles prepared by microware irradiation have small particle size and good size distribution. The nanoparticle size and shape are highly dependent on the nature of the reducing agent and concentration of NaOH. Using UV-Vis spectra, it was found that the velocity of the formation of the Au nanoparticles in the reactive system with adding of NaOH was obviously faster and easier to form spherical particles than that without NaOH.

Key words: Microwave irradiation:Nanoparticle, Au colloid:Poly(1-vinylpyrrolidone)