Intrinsically formed trivalent titanium ions in sol-gel titania

Citation
E. Munoz et al., Intrinsically formed trivalent titanium ions in sol-gel titania, J AM CERAM, 84(2), 2001, pp. 392-398
Citations number
29
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
ISSN journal
0002-7820 → ACNP
Volume
84
Issue
2
Year of publication
2001
Pages
392 - 398
Database
ISI
SICI code
0002-7820(200102)84:2<392:IFTTII>2.0.ZU;2-X
Abstract
Electron paramagnetic resonance (EPR) room-temperature observation of triva lent titanium in sol-gel titania has been reported, This unprecedented dete ction of stable paramagnetic signals in this titania, which was treated at 200 degrees -800 degreesC, occurred regardless of whether the atmosphere wa s reducing, inert, or oxidating, The possibility that the paramagnetic sign als may originate from an metal impurity other than titanium was completely excluded by analyzing the samples using three different ion-beam-analysis techniques: Rutherford backscattering spectroscopy, particle-induced X-ray emission resonance, and energy-recoil detection analysis. The paramagnetic signals appeared at precisely the temperature range of the sample dehydroxy lation, which suggests a mechanism for explaining these Ti3+ EPR spectra.