Ionic Immobilization of Silicotungstic Acid on Amine-Functionalized Zirconia: A Mesoporous Catalyst for Esterification of Maleic Acid

被引：6
|
作者：
Ramalingam, Meenakshi [1 ]
Manickam, Sundar [1 ]
Srinivasalu, Kutti Rani [1 ]
Ismail, Mohammed Bilal [1 ]
Deivanayagam, Easwaramoorthy [1 ]
机构：
[1] BS Abdur Rahman Univ, Dept Chem, Madras 600048, Tamil Nadu, India
来源：
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2016年 / 11期
关键词：
Silicotungstic acid; Mesoporous materials; Zirconia; Polyoxometallates; Electrostatic interactions; Supported catalysts; SURFACE FUNCTIONALIZATION; TRANSITION; LIQUID; 3-AMINOPROPYLTRIETHOXYSILANE; NANOCRYSTALS; DISPERSION; CHEMISTRY;
D O I：
10.1002/ejic.201501422
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Silicotungstic acid (H4SiW12O40) has been immobilized onto the mesopores of amine-functionalized zirconia by exploitation of electrostatic interactions. The ionic grafting of silicotungstic acid was confirmed by XPS, FTIR, UV/Vis-DRS and TGA analysis. The mesoporosity of the material was confirmed through N-2 adsorption/desorption analysis. The morphology of the material was established by TEM analysis. The immobilized silicotungstate material was found to be an efficient heterogeneous catalyst for selective esterification of maleic acid with butan-1-ol. A 98 % level of conversion of maleic acid and 82 % selectivity for dibutyl maleate within 5 h at 95 degrees C was achieved. The catalyst could be reused thrice without loss of activity.
引用
收藏
页码：1697 / 1705
页数：9
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