Studies on the solid-state ion exchange of nickel ions into zeolites using DRS technique

被引：21

作者：

Zanjanchi, MA ^{[1
]}

Ebrahimian, A ^{[1
]}

机构：

[1] Univ Guilan, Fac Sci, Dept Chem, Rasht 41335, Iran

来源：

JOURNAL OF MOLECULAR STRUCTURE | 2004年 / 693卷 / 1-3期

关键词：

solid-state ion exchange; Ni2+ cation; zeolite; diffuse reflectance spectroscopy; dehydrated;

D O I：

10.1016/j.molstruc.2004.03.004

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 coordination of Ni2+ ions in the dehydrated nickel-exchanged zeolites was investigated from the analysis of diffuse reflectance spectra. Solid-state ion exchange method was used to prepare nickel-containing mordenite, Y, L and mazzite zeolites. In the dehydrated mordenite and zeolite Y, nickel cations are presented in both forms of tetrahedral and distorted tetrahedral symmetries. The relative amount of tetrahedral and distorted tetrahedral nickel species are related to the heating temperature and heating time used for calcinations. In the dehydrated zeolite L and mazzite, Ni2+ ions are mainly in the distorted octahedral symmetries. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：211 / 216

页数：6

共 37 条

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[Anonymous], ADV MAT

[2]

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