Oxygen Isotope Exchange between Carbon Dioxide and Solid Ti(18)O(2)

0377710 - ÚFCH JH 2013 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Civiš, Svatopluk - Ferus, Martin
Oxygen Isotope Exchange between Carbon Dioxide and Solid Ti(18)O(2).
13TH INTERNATIONAL CONFERENCE ON TRANSPARENT OPTICAL NETWORKS (ICTON). New York: IEEE, 2011, s. 1-3. ISBN 978-1-4577-0880-0.
[International Conference on Transparent Optical Networks (ICTON) /13./. Stockholm (SE), 26.06.2011-30.06.2011]
Grant CEP: GA AV ČR IAA400400705; GA AV ČR IAAX00100903
Výzkumný záměr: CEZ:AV0Z40400503
Klíčová slova: TiO2 * oxygen isotope exchange * Raman spectroscopy
Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie

Titanium dioxide is an attractive material for (photo) catalysis, solar cells, electrochromics and batteries [1], while various fundamental studies would benefit from the accessibility of a totally (18)O exchanged material. For instance, O-isotope labeling would allow deeper discussion of Raman spectra, because the presence of heavier oxygen atom in the crystal lattice of titania (anatase, rutile) influences differently various Raman active vibrations of the lattice. Second motivation for synthesis of Ti(18)O(2) was the investigation of surface effects during titania/gas interaction [2]. Here we report, for the first time, the preparation of pure Ti(18)O(2) both in anatase and rutile forms. Raman spectroscopy indicated various isotope shifts for the known vibration modes of titania (anatase, rutile). The interaction with carbon dioxide was investigated with the aim to explore oxygen isotope exchange at the Ti(18)O(2)/CO(2) interface. For this purpose, high-resolution Fourier transform infrared spectroscopy of the gas phase was adopted.
Trvalý link: http://hdl.handle.net/11104/0209802