反相微乳液中憎水性纳米金的原位还原法合成  

In situ reducing synthesis of hydrophobic gold nanoparticles in W/O microemulsion

作　　者：姚玉峰[1] 杨功俊[1] 朱靖[1] 沈明[1] 

机构地区：[1]扬州大学化学化工学院,江苏扬州225002

出　　处：《化学研究与应用》2008年第6期729-735,共7页Chemical Research and Application

基　　金：国家自然科学基金资助项目(20773105);胶体与界面化学教育部重点实验室(山东大学)开放课题基金资助项目(200702)

摘　　要：利用十八胺(C18NH2)/正丁醇/正庚烷/HAuCl4(aq)W/O型微乳液体系,在常温的碱促进条件下由正丁醇原位还原氯金酸合成了具有高度单分散的憎水性金纳米粒子。由C18NH2稳定的金纳米颗粒运用紫外可见光谱(UV-vis)、透射电镜(TEM)和X射线衍射(XRD)等分别进行了表征和分析,并探讨了微乳液体系各组分对形成金纳米粒子形貌、尺寸和单分散性的影响。结果显示,随十八胺/氯金酸摩尔比的增加,金粒子的尺寸逐渐减小而单分散性逐渐提高。在正丁醇原位慢还原氯金酸的过程中,实验所选W/O型微乳液模板和表面活性剂十八胺分子对憎水性金纳米粒子的形貌和尺寸仍具有良好的控制作用。The hydrophobic gold nanoparticles with high monodispersity are synthesized by using n -butanol reduction in situ under the condition of alkali promotion in octadecylamine（ C1sNH2 ）/n - butanol/n - heptane/HAuCl4 （aq） W/O mieroemulsion at room temperature. The CIaNH2 - stabilized gold nanoparticles are characterized by UV - vis, TEM and XRD, respectively, and the effects of components of the mieroemulsion system on the shape, size and monodispersity of gold nanopartieles are also explored. The results show that the particle size decreases, while the monodispersity of gold nanopartieles improves with the increase of the molar ratio of C,8 NH2/HAuCI4. In addition, the selected W/O microemulsion template and octadecylamine surfaetant molecules still have good controlling function for the morphology and size of hydrophobic gold nanoparticles even when n - butanol slowly reduces HAuCI4 in situ.

关 键 词：憎水性金纳米粒子 W/O型微乳液 十八胺 正丁醇 原位合成 

分 类 号：O614[理学—无机化学]