Počet záznamů: 1
The application of high-resolution IR spectroscopy and isotope labeling for detailed investigation of TiO2/gas interface reactions
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SYSNO ASEP 0394510 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název The application of high-resolution IR spectroscopy and isotope labeling for detailed investigation of TiO2/gas interface reactions Tvůrce(i) Civiš, Svatopluk (UFCH-W) RID, ORCID, SAI
Ferus, Martin (UFCH-W) ORCID, RID
Zukalová, Markéta (UFCH-W) RID, SAI, ORCID
Kavan, Ladislav (UFCH-W) RID, ORCID
Zelinger, Zdeněk (UFCH-W) RID, ORCIDZdroj.dok. Optical Materials. - : Elsevier - ISSN 0925-3467
Roč. 36, č. 1 (2013), s. 159-162Poč.str. 4 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova isotope exchange ; titania ; isotope labeling Vědní obor RIV CF - Fyzikální chemie a teoretická chemie CEP GAP208/10/2302 GA ČR - Grantová agentura ČR GA13-07724S GA ČR - Grantová agentura ČR Institucionální podpora UFCH-W - RVO:61388955 UT WOS 000327232600030 EID SCOPUS 84886307294 DOI 10.1016/j.optmat.2013.04.009 Anotace The main motivation for the synthesis of Ti18O2 was the investigation of surface effects during titania/gas interaction. The interaction with carbon dioxide was investigated with the aim to explore oxygen isotope exchange at the Ti18,17O2/CO2 interface. For this purpose, high-resolution Fourier transform infrared spectroscopy of the gas phase was adopted. In the present study, we have explored the oxygen isotope exchange between gaseous C16O2 and solid Ti18O2 or Ti17O2. The present measurement in dark mixtures has, as its primary goal, the determination of the time-scale of the spontaneous isotope exchange between carbon dioxide and solid TiO2. The profiles of the individual lines of selected isotopologues (isolated lines in the spectrum) were fitted and quantified. The quantification of the spectra was carried out on the basis of calibration measurements of the absorption spectra of individual isotopologues (reference gases) of carbon dioxide at different pressures. The concentrations of individual isotopologues determined from the intensity profiles of the individual rotation–vibration lines are characterized by the exponential decrease of the 16O–C–16O isotopologue and the exponential increase of the 18O–C-18O isotopologue. The 18O–C–16O acts as an intermediate in the mixture and its concentration remains almost constant. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2014
Počet záznamů: 1