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

催化学报 , 2007, 28(10): 875-879.

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 ^2, , 王平军 ^3, , 金勇 ^4, , 银董红 ^5,

1.湖南师范大学精细催化合成研究所,湖南长沙,410081

2.湖南师范大学精细催化合成研究所,湖南长沙,410081

3.湖南师范大学精细催化合成研究所,湖南长沙,410081

4.湖南师范大学精细催化合成研究所,湖南长沙,410081;湖南中烟工业公司技术中心,湖南长沙,410001

5.湖南师范大学精细催化合成研究所,湖南长沙,410081;湖南中烟工业公司技术中心,湖南长沙,410001

基金项目: 教育部留学回国人员科研启动基金(2003-406)

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

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

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%.

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