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制备特定尺寸形貌的纳米金颗粒方法及性能表征

发表时间:2010-10-31  浏览量:2331  下载量:1197
全部作者: 郑海霞,黄博能,胡君曼,龚煈
作者单位: 北京服装学院材料科学与工程学院
摘 要: 通过化学还原法制备出不同粒径的纳米金颗粒,利用紫外可见分光光度计和透射电子显微镜(transmission electron microscopy, TEM)对纳米金颗粒的形貌及尺寸进行表征。讨论了还原剂种类、还原剂用量、试剂加入顺序、反应温度等因素对纳米金稳定性、粒径、形貌和分散性的影响。结果表明:Na3C6H5O7为还原剂制得纳米金颗粒粒径在15~20 nm之间,NaBH4为还原剂制得的纳米金颗粒粒径在3~10 nm之间;柠檬酸钠与氯金酸的摩尔比为1.5∶1时最佳;Na3C6H5O7为还原剂时,采用HAuCl4溶液加入到加热的Na3C6H5O7与聚乙烯吡咯烷酮(poly vingl pyrrolidone, PVP)混合溶液比Na3C6H5O7溶液加入到加热的HAuCl4与PVP混合溶液制得的纳米金溶胶的颗粒分散性好,粒径小且更均一。
关 键 词: 材料合成与加工纳米金制备;柠檬酸钠还原剂;硼氢化钠还原剂;聚乙烯吡咯烷酮;透射电子显微镜
Title: Synthesis and characterization of nano-gold particles with specified diameter and shape
Author: ZHENG Haixia, HUANG Boneng, HU Junman, GONG Yan
Organization: College of Material Sciences and Engineering, Beijing Institute of Fashion Technology
Abstract: Nano-gold particles with different diameters were prepared by chemical reduction, and UV-Vis spectroscopy and transmission electron microscopy(TEM)were used to characterize the morphology and size of the prepared gold nanoparticles. The factors, such as the type of the reducing agent, the amount of the reducing reagent, reagent adding order and reaction temperature, influencing the stability, radius, morphology and dispersion of gold nanoparticles have been studied. The results showed that Au nanoparticles prepared with Na3C6H5O7 as a reductant was within the size of 10-20 nm and prepared with NaBH4 as a reducing agent was within the size of 3-10 nm. The optimum molar ratio of Na3C6H5O7 and HAuCl4 was 1.5∶1. The nano-goad particles prepared after adding HAuCl4 to the hot mixture of Na3C6H5O7 and poly vingl pyrrolidone (PVP) solution were better dispersed, smaller and more uniform than the nano-goad particles prepared after adding Na3C6H5O7 to the hot mixture of HAuCl4 and PVP solution.
Key words: materials synthesis and processing; preparation of nano-gold particles; sodium citrate reducing agent; sodium borohydride reducing agent; poly vingl pyrrolidone; transmission electron microscopy
发表期数: 2010年10月第20期
引用格式: 郑海霞,黄博能,胡君曼,等. 制备特定尺寸形貌的纳米金颗粒方法及性能表征[J]. 中国科技论文在线精品论文,2010,3(20):2130-2136.
 
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