催化学报

催化学报 ›› 2007, Vol. 28 ›› Issue (10): 875-879.

• 研究论文 • 上一篇    下一篇

硫醚功能化离子液体固定纳米金粒子的制备及其催化性能

李标模1,喻宁亚1,王平军1,金勇1,2,银董红1,2   

  1. 1 湖南师范大学精细催化合成研究所, 湖南长沙 410081; 2 湖南中烟工业公司技术中心, 湖南长沙 410001
  • 收稿日期:2007-10-25 出版日期:2007-10-25 发布日期:2011-10-28

Preparation and Catalytic Performance of Gold Nanoparticles Stabilized by Thioether-Functionalized Ionic Liquid

LI Biaomo1, YU Ningya1*, WANG Pingjun1, JIN Yong1,2, YIN Donghong1,2*   

  1. 1 Institute of Fine Catalysis and Synthesis, Hunan Normal University, Changsha 410081, Hunan, China; 2 Technology Center, China Tobacco Hunan Industrial Corporation, Changsha 410001, Hunan, China
  • Received:2007-10-25 Online:2007-10-25 Published:2011-10-28

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摘要： 合成了一种新型的硫醚功能化离子液体(TFIL), 以其为稳定剂在1-甲基-3-丁基咪唑六氟磷酸离子液体中制备了TFIL固定的纳米金粒子(GNP-TFIL)催化剂. 采用红外光谱、紫外-可见光谱和透射电子显微镜等方法对GNP-TFIL催化剂进行了表征. 结果表明, TFIL在固定纳米金粒子之后仍保持着离子液体的基本结构; 纳米金粒子的分布均匀,粒径为2.0～3.6 nm. GNP-TFIL催化剂对苯乙烯环氧化反应具有较高的催化活性,且可以重复使用. 在45 ℃下反应6 h时,苯乙烯的转化率和环氧苯乙烷的选择性分别可达100%和88.5%.

关键词: 硫醚功能化离子液体, 纳米金粒子, 苯乙烯, 环氧化, 环氧苯乙烷

Abstract: A novel thioether-functionalized ionic liquid (TFIL) was synthesized and applied as a stabilizer for the preparation of gold nanoparticles (GNP) in the ionic liquid of 1-n-butyl-3-methylimidazolium hexafluorophosphate. GNP stabilized by TFIL (GNP-TFIL) were characterized by Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy, and transmission electron microscopy. GNP-TFIL remained the structure of TFIL after GNP was stabilized by TFIL. GNP-TFIL displayed an interface resonance absorption appearing around 526 nm, which suggests the formation of GNP. GNP stabilized by TFIL could be dispersed uniformly with the particle size of2.0-3.6nm. GNP exhibited high catalytic activity in the epoxidation of styrene and could be reused. The conversion of styrene and the selectivity for styrene oxide were as high as 100% and 88.5%, respectively, when the reaction was performed at 45 ℃ for6 husing 3-chloroperoxybenzoic acid as the oxidant.

Key words: thioether-functionalized ionic liquid, gold nanoparticle, styrene, epoxidation, styrene oxide