Tungstate ion-alumina interaction in a 188W → 188Re biomedical generator

E. Dadachova, S. Mirzadeh, R. M. Lambrecht

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The surface interaction between WO42 ions and the alumina support in the 188W → 188Re/Al2O3 biomedical generator system was examined by the dynamic adsorption method employing the 187W tracer and by FT-IR, Raman, 27Al MAS NMR, and XPS spectroscopic methods. These studies demonstrated the complex physical and chemical nature of WO42- ion adsorption on alumina. The dynamic adsorption studies indicated that the adsorption process includes several stages from initial monolayer formation to almost complete saturation of the alumina surface. FTIR, Raman, and 27Al MAS NMR data showed that adsorption of WO42- on the Al2O3 surface in slightly acidic solutions proceeds via formation of thermodynamically stable complexes of tetrahedrally coordinated aluminum atoms and WO42- tetrahedrons. Previously, these complexes were shown to form, and were identified, only under calcination conditions. Our conclusion on the nature of WO42--Al2O3 complex in aqueous solutions was further supported by the results from XPS studies where it was shown that W-containing species are strongly attached to the surface of alumina via W-O bonds.

Original languageEnglish (US)
Pages (from-to)10976-10981
Number of pages6
JournalJournal of Physical Chemistry
Volume99
Issue number27
StatePublished - Jul 6 1995
Externally publishedYes

Fingerprint

tungstates
Aluminum Oxide
Alumina
generators
aluminum oxides
Adsorption
adsorption
Ions
ions
interactions
X ray photoelectron spectroscopy
Nuclear magnetic resonance
nuclear magnetic resonance
Aluminum
tetrahedrons
Calcination
roasting
surface reactions
tracers
Monolayers

ASJC Scopus subject areas

  • Engineering(all)
  • Physical and Theoretical Chemistry

Cite this

Dadachova, E., Mirzadeh, S., & Lambrecht, R. M. (1995). Tungstate ion-alumina interaction in a 188W → 188Re biomedical generator. Journal of Physical Chemistry, 99(27), 10976-10981.

Tungstate ion-alumina interaction in a 188W → 188Re biomedical generator. / Dadachova, E.; Mirzadeh, S.; Lambrecht, R. M.

In: Journal of Physical Chemistry, Vol. 99, No. 27, 06.07.1995, p. 10976-10981.

Research output: Contribution to journalArticle

Dadachova, E, Mirzadeh, S & Lambrecht, RM 1995, 'Tungstate ion-alumina interaction in a 188W → 188Re biomedical generator', Journal of Physical Chemistry, vol. 99, no. 27, pp. 10976-10981.
Dadachova E, Mirzadeh S, Lambrecht RM. Tungstate ion-alumina interaction in a 188W → 188Re biomedical generator. Journal of Physical Chemistry. 1995 Jul 6;99(27):10976-10981.
Dadachova, E. ; Mirzadeh, S. ; Lambrecht, R. M. / Tungstate ion-alumina interaction in a 188W → 188Re biomedical generator. In: Journal of Physical Chemistry. 1995 ; Vol. 99, No. 27. pp. 10976-10981.
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