Preparation and characterization of microporous SiO2-ZrO2 pillared montmorillonite

被引：12

作者：

Han, YS

Yamanaka, S

机构：

[1] Nanospace Co Ltd, Business Incubator, Korea Inst Ceram Engn & Technol, Seoul 153801, South Korea

[2] Hiroshima Univ, Fac Engn, Dept Appl Chem, Higashihiroshima 739, Japan

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2006年 / 179卷 / 04期

关键词：

clays; pillaring; microporosity; nanoparticle; zirconia;

D O I：

10.1016/j.jssc.2006.01.013

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

SiO2-ZrO2 pillared montmorillonite (SZM) was prepared by the reaction of Na-montmorillonite with colloidal silica-zirconia particles which were prepared by depositing zirconium hydroxy cations on silica particles. By pillaring with the colloidal particles., the basal spacing of montmorillonite was expanded to ca. 45 angstrom and the calcined SZM samples showed large specific surface areas up to 320m(2)/g at 400 degrees C. In spite of large interlayer separation,. adsorption results indicated the presence of micropores generated between the colloidal particles. The microporous structure was maintained at least up to 600 degrees C and exhibited specific shape selectivity for the adsorption of large organic molecules, especially between toluene and mesitylene. According to the temperature-programmed-desorption (TPD) spectra of ammonia, the calcined SZM showed weakly acidic sites. (c) 2006 Elsevier Inc. All rights reserved.

引用

页码：1146 / 1153

页数：8

共 38 条

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