Spectroscopic studies of Fe(III) ion-exchanged ETS-10 and ETAS-10 molecular sieves

David A. Sommerfeld, Welther R. Ellis, Edward M. Eyring, S. M. Kuznicki, K. A. Thrush

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

Two new titanium silicate molecular sieves, designated ETS-10 and ETAS-10, have been ion-exchanged with Fe(III). Both products exhibit prominent EPR signals, at g = 6.0 and 4.3, that are assigned to populations of ferric iron on the surface and in the interior cavities, respectively, of the molecular sieve microcrystals. Corollary XPS measurements on these samples indicate that a substantial fraction of the surface iron is present as Fe(II). Chemical modification procedures have been explored in an effort to produce ion-exchanged materials containing no exterior iron. Acid treatment (pH 1.0) proved to be an effective means of achieving this goal in the case of ETS-10-based materials. ETAS-10-based samples do not retain their crystallinity under these conditions.

Original languageEnglish (US)
Pages (from-to)9975-9978
Number of pages4
JournalJournal of physical chemistry
Volume96
Issue number24
StatePublished - Dec 1 1992
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)
  • Physical and Theoretical Chemistry

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    Sommerfeld, D. A., Ellis, W. R., Eyring, E. M., Kuznicki, S. M., & Thrush, K. A. (1992). Spectroscopic studies of Fe(III) ion-exchanged ETS-10 and ETAS-10 molecular sieves. Journal of physical chemistry, 96(24), 9975-9978.