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化学学报
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化学学报 ›› 2005, Vol. 63 ›› Issue (5): 396-400. 上一篇    下一篇

研究论文

苯基磺酸官能化中孔硅基材料的制备及催化性能研究

杨建明，寇联岗，吕剑*   

  1. (西安近代化学研究所　西安 710065)
  • 投稿日期:2004-03-16 修回日期:2004-11-10 发布日期:2010-12-10
  • 通讯作者: 吕剑

Preparation and Catalytic Performance of Phenylsulfonic Acid Functionalized Mesoporous Silica

YANG Jian-Ming, KOU Lian-Gang, LÜ Jian*   

  1. (Xi′an Modern Chemistry Research Institute, Xi′an 710065)
  • Received:2004-03-16 Revised:2004-11-10 Published:2010-12-10
  • Contact: Lü Jian

PDF

1266

被引次数

55

通过溶胶-凝胶法制得了苯基聚硅氧烷, 进一步磺化制备了苯基磺酸官能化的中孔硅基催化材料, 并通过BET, SEM和固体核磁技术对其进行了表征. BET结果表明, 该催化剂比表面积为722 m2/g, 平均孔径为9.06 nm, 孔容0.59 mL/g. 13C CPMAS NMR和29Si CPMAS NMR表征显示磺酸基键合于苯环间位, 苯基以共价方式进入无机-有机杂化硅基材料的内部结构. 该固体酸的活性中心磺酸基在表面呈均匀分布, 在芳族羧酸和取代酚的直接酯化反应中表现出优异的催化性能.

关键词: 有机-无机杂化材料, 中孔硅基材料, 固体酸, 酯化

Phenylsulfonic acid functionalized mesoporous silica as catslyst was synthesized by sol-gel technique to form a precursor bearing phenyl groups followed by further sulfonation, and characterized by BET, SEM and solid NMR. The nitrogen adsorption-desorption isotherms indicated that the specific area of the catalyst was 722 m2/g, the average pore size ca. 9.06 nm and pore volume 0.59 cm3/g. 13C and 29Si CPMAS NMR spectra showed that the phenyl ring bonded with sulfonic acid group in meta-position covalently interacts with the framework of the hybrid materials. With an even distribution of active sites for the sulfonic acid groups, the catalyst showed a highly catalytic performance in esterification of various aromatic carboxylic acids with substituted phenol.

Key words: organic-inorganic hybrid material, mesoporous silica, solid acid, esterification