Synthesis and characterization of zirconium containing mesoporous silicas I. Hydrothermal synthesis of Zr-MCM-41-type materials

被引：84

作者：

Wang, XX

Lefebvre, F

Patarin, J

Basset, JM

机构：

[1] UMR CNRS 9986, CPE, Lab Chimn Organomet Surface, F-69616 Villeurbanne, France

[2] Ecole Natl Super Chim, URA CNRS 428, Lab Mat Mineraux, F-68093 Mulhouse, France

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2001年 / 42卷 / 2-3期

关键词：

mesoporous silica; zirconium; zirconyl; acidity;

D O I：

10.1016/S1387-1811(00)00329-2

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Zirconium containing MCM-41-type has been synthesized by a near neutral route. Various solids, with Si/Zr molar ratios ranging from 20 to infinity, were prepared. Ail these solids have high surface area and good crystallinity. Addition of zirconium results in a linear increase of both the Lewis and Bronsted acidities. At least one-third of zirconium is at the surface or near the surface, probably in the form of [(=Si-O)(3)Zr-O-] species. As a consequence, introduction of zirconium on the surface results in the appearance of a negative charge, compensated by sodium ions which can be exchanged. (C) 2001 Elsevier Science B.V. All rights reserved.

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页码：269 / 276

页数：8

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