乳化/还原反相胶束制备金纳米颗粒及光谱分析  

Emulsification / Reduction Preparation of Gold Nanoparticles by Reverse Micelles and Spectroscopic Analysis

作　　者：顾晓龙[1] 张睿[1] 蒋建国[1] 

机构地区：[1]扬州职业大学生物与化工工程学院,江苏扬州225009

出　　处：《广州化工》2016年第10期115-117,共3页GuangZhou Chemical Industry

摘　　要：使用司盘20作为乳化剂制备了氯金酸-十二烷反相胶束。在胶束生长的过程中,司盘20的亲水端与扩散进胶束的氯金酸发生氧化还原反应生成了单质金,并使用紫外-可见光谱法分析了粒径和粒径分布。由于司盘20对胶束的稳定化作用,胶束之间无法发生聚并,阻碍了单质金的生长,从而获得了金纳米颗粒。廉价的司盘20本身既充当了乳化剂又充当了还原剂。反应条件温和、时间短,从原料到过程到产品均符合绿色化学要求。同时通过调节加料比例,金纳米颗粒大小可控。HAuCl_4/ Dodecane reverse micelles were prepared using Span 20 as the surfactant. During the growth of reverse micelles,the hydrophilic end of Span 20 reduced the HAuCl_4 to form gold nanoparticles within the micelles. UV-vis was used to characterize the size and size distribution. The fusion between micelles was hindered due to the stability effects of Span 20,thus the gold nanoparticles were not able to merge and grow. Span 20 itself behaved as both the emulsifier and the reductant. The fast reaction rate and the mild reaction condition met the requirement of Green Chemistry. The size of gold nanoparticles can be controlled by varying the ratio of reagents.

关 键 词：纳米材料 金纳米颗粒 反相胶束 紫外-可见光谱 粒径 

分 类 号：TF831[冶金工程—有色金属冶金]