Fe3+-substituted silicate gels

Precursors for zeolite-based catalysts

T. Pannaparayil, R. Marande, Sridhar Komarneni

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In order to investigate the possibility of isomorphous substitution of Fe3+ for Si4+ in the tetrahedral silicate network, two Fe-substituted silicate gel samples with Si/Fe atom ratios of 50 and 25 were prepared by the solution-sol-gel processing technique. The samples were characterized by magnetization and Mössbauer spectroscopic measurements over the temperature range 293-4.2 K. The magnetic moment of the Fe ions and Mössbauer isomer shifts were used to determine the valence state and coordination symmetry of the Fe species present in these gel samples. It has been found that iron enters substitutionally into the tetrahedral silicate structure, especially at low concentrations. This result is of importance, since Fe substituted silicates can be used as catalyst precursors in several technologically relevant chemical reactions.

Original languageEnglish (US)
Pages (from-to)6010-6012
Number of pages3
JournalJournal of Applied Physics
Volume69
Issue number8
DOIs
StatePublished - Dec 1 1991

Fingerprint

silicates
gels
catalysts
low concentrations
chemical reactions
isomers
magnetic moments
substitutes
valence
iron
magnetization
shift
symmetry
atoms
ions
temperature

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Pannaparayil, T. ; Marande, R. ; Komarneni, Sridhar. / Fe3+-substituted silicate gels : Precursors for zeolite-based catalysts. In: Journal of Applied Physics. 1991 ; Vol. 69, No. 8. pp. 6010-6012.
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Fe3+-substituted silicate gels : Precursors for zeolite-based catalysts. / Pannaparayil, T.; Marande, R.; Komarneni, Sridhar.

In: Journal of Applied Physics, Vol. 69, No. 8, 01.12.1991, p. 6010-6012.

Research output: Contribution to journalArticle

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T1 - Fe3+-substituted silicate gels

T2 - Precursors for zeolite-based catalysts

AU - Pannaparayil, T.

AU - Marande, R.

AU - Komarneni, Sridhar

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