H3PW12O40 immobilized on silylated palygorskite and catalytic activity in esterification reactions

被引：71
|
作者：
Zhang, Lixia [1 ]
Jin, Qingzhe [1 ]
Shan, Liang [1 ]
Liu, Yuanfa [1 ]
Wang, Xingguo [1 ]
Huang, Jianhua [1 ]
机构：
[1] Jiangnan Univ, Sch Food Sci & Technol, State Key Lab Food Sci & Technol, Wuxi 214122, Jiangsu, Peoples R China
来源：
APPLIED CLAY SCIENCE | 2010年 / 47卷 / 3-4期
基金：
中国国家自然科学基金;
关键词：
Heteropolyacid (HPA); Phosphotungstic acid (HPW); Palygorskite; Aminosilane; Immobilization; Esterification; HETEROPOLYACID CATALYST; HIGHLY EFFICIENT; BISPHENOL-A; CLAY; SURFACE; SILICA; OXIDATION; SEPIOLITE; KEGGIN; AREA;
D O I：
10.1016/j.clay.2009.10.014
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The surface of acid-activated palygorskite (Pa) was modified by grafting 3-aminopropyltriethoxysilane (APTES) (the silylated Pa denoted Pa-APTES) for immobilization of phosphotungstic acid (H3PW12O40, HPW). The samples were characterized by Fourier transform infrared spectroscopy (FTIR), N-2 adsorption-desorption, X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS). The catalytic activity was tested for the esterification of n-butanol with acetic acid. Both HPW/Pa-APTES and HPW/Pa showed high and specific catalytic activity on the first use. Repeated use, decreased the catalytic activity of HPW/Pa-APTES Slowly, that of HPW/Pa strongly. Due to its unique properties, low cost and ready availability, HPW/Pa-APTES provides a satisfactory option for catalyzing esterification reactions. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：229 / 234
页数：6
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