XANES STUDY OF TI AND FE SUBSTITUTED SILICALITES IN PRESENCE AND IN ABSENCE OF NH3 AND COMPARISON WITH UV-VIS, IR AND RAMAN-SPECTRA

Authors
BORDIGA S GEOBALDO F LAMBERTI C ZECCHINA A BOSCHERINI F GENONI F LEOFANTI G PETRINI G PADOVAN M GEREMIA S VLAIC G
Citation
S. Bordiga et al., XANES STUDY OF TI AND FE SUBSTITUTED SILICALITES IN PRESENCE AND IN ABSENCE OF NH3 AND COMPARISON WITH UV-VIS, IR AND RAMAN-SPECTRA, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 97(1-4), 1995, pp. 23-27
Citations number
15
Categorie Soggetti
Physics, Nuclear","Nuclear Sciences & Tecnology","Instument & Instrumentation
Journal title
Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms → ACNP
ISSN journal
0168583X
Volume
97
Issue
1-4
Year of publication
1995
Pages
23 - 27
Database
ISI
SICI code
0168-583X(1995)97:1-4<23:XSOTAF>2.0.ZU;2-6
Abstract
The effects on the local environment of metal centres in Ti- and Fe-si licalites, induced by a vacuum treatment and by subsequent NH3 dosage, has been studied by means of XANES and UV-vis spectroscopies. The Ti( TV) environment is mainly tetrahedral in vacuo and becomes octahedral after interaction with NH3. Fe(III) is in tetrahedral coordination in presence of adsorbates, while in vacuo it is in a distorted tetrahedra l symmetry. These conclusions are qualitatively supported by IR and Ra man data.