Catalysis Letters

, Volume 26, Issue 1–2, pp 195–208

XAFS study of Ti-silicalite: structure of framework Ti(IV) in presence and in absence of reactive molecules (H2O, NH3)

  • S. Bordiga
  • F. Boscherini
  • S. Coluccia
  • F. Genonic
  • C. Lamberti
  • G. Leofanti
  • L. Marchese
  • G. Petrini
  • G. Vlaic
  • A. Zecchina
Article

DOI: 10.1007/BF00824045

Cite this article as:
Bordiga, S., Boscherini, F., Coluccia, S. et al. Catal Lett (1994) 26: 195. doi:10.1007/BF00824045

Abstract

X-ray absorption at the Ti K edge (both XANES and EXAFS) of a very pure Ti-silicalite containing a small fraction of Ti(IV) substituting Si(IV), has been performed in order to study the effect of the presence or absence of ligands such as H2O and NH3 on the Ti(IV) coordination sphere. In particular, the effect of an outgassing treatment at 400 K and of the interaction with NH3 has been studied and described in detail. It has been found that the Ti(FV) is fourfold coordinated in the samples outgassed at 400 K and expands its coordination sphere number under the action of adsorbates.

Keywords

zeolite Ti-silicalite XAFS XANES pre edge absorption EXAFS 

Copyright information

© J.C. Baltzer AG, Science Publishers 1994

Authors and Affiliations

  • S. Bordiga
    • 1
  • F. Boscherini
    • 2
  • S. Coluccia
    • 1
  • F. Genonic
    • 3
  • C. Lamberti
    • 1
    • 4
  • G. Leofanti
    • 3
  • L. Marchese
    • 1
  • G. Petrini
    • 3
  • G. Vlaic
    • 5
    • 6
  • A. Zecchina
    • 1
  1. 1.Dipartimento di Chimica InorganicaChimica, Fisica e Chimica dei MaterialiTurinItaly
  2. 2.INFN -LNFRomeItaly
  3. 3.Centro di Ricerche ENICHEM ANIC di BollateBollateItaly
  4. 4.INFN Sezione di TorinoTurinItaly
  5. 5.Dipartimento di Scienze ChimicheTrieste
  6. 6.Sincrotrone Trieste SCPATriesteItaly

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