Synthesis, characterization and ion exchange properties of the framework sodium titanium germanate Na3H(TiO)3(GeO)(GeO4)3·7H2O

A. Puziy; J. García

doi:10.1007/bf02349862

Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 240: Issue 3

Synthesis, characterization and ion exchange properties of the framework sodium titanium germanate Na₃H(TiO)₃(GeO)(GeO₄)₃·7H₂O

Authors:

A. Puziy

A. Puziy Institute for Sorption & Problems of Endoecology Naumov Str. 13 252164 Kiev Ukraine

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J. García

J. García Universidad de Oviedo Departamento de Química Orgánica e Inorgánica 33071 Oviedo Spain

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Pages:: 851–857

Online Publication Date:: 10 Apr 2006

Publication Date:: 17 Jun 1999

Article Category:: Research Article

DOI:: https://doi.org/10.1007/bf02349862

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Abstract

Sodium titanium germanate with a semicrystalline framework (STG) of the formula Na₃H(TiO)₃(GeO)(GeO₄)₃·7H₂O was synthesized under mild hydrothermal conditions and its proton form, H₄(TiO)₃(GeO)(GeO₄)₃·8H₂O (STG-H), was prepared by acid treatment of the sodium compound. The STG was characterized by elemental analysis, TGA, FT-IR, and X-ray powder diffraction. A comparative ion exchange examination of the STG-H towards alkali and alkaline earth metals in a broad pH and concentration range was carried out. It was found that the STG is a moderately weak cation exchanger, possessing high ion exchange capacity (up to 4.0 meq/g) and showing preference for heavy alkali and alkaline earth metals. The STG selectivity towards Cs⁺ and Sr²⁺ ions in the presence of competitive metal ions and certain organic compounds was also studied. The data obtained suggest that the sodium titanium germanate is a more selective exchanger for Sr²⁺ ion than its titanium silicate analogue, K₃H(TiO)₄(SiO₄)₃·4H₂O.

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Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5731 (Print)
ISSN	1588-2780 (Online)