THE STATE OF TI IN TITANOALUMINOSILICATES ISOMORPHOUS WITH ZEOLITE-BETA

被引：345

作者：

BLASCO, T ^{[1
]}

CAMBLOR, MA ^{[1
]}

CORMA, A ^{[1
]}

PEREZPARIENTE, J ^{[1
]}

机构：

[1] UNIV POLITECN QUIM VALENCIA,CSIC,INST TECNOL QUIM,CNO VERA S-N,E-46071 VALENCIA,SPAIN

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 1993年 / 115卷 / 25期

关键词：

D O I：

10.1021/ja00078a020

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A large-pore Ti-containing zeolite, which is active for hydrocarbon oxidation at mild conditions, has been obtained by direct synthesis. This is isomorphous with zeolite beta, and the crucial effect of alkali metal cations on the product has been described. By means of IR spectroscopy, XRD, thermal analysis, XPS, EXAFS-XANES, and DRS-UV techniques, it has been shown that the synthesis carried out without alkali metal cations leads to zeolite beta with Ti located in the framework positions. The results allow us to propose a model which explains the varying Ti coordination for as-made and calcined samples, hydrated and dehydrated. The model is consistent with the literature data on TS-1 and TS-2 structures.

引用

页码：11806 / 11813

页数：8

共 38 条

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