Pentylcyanobiphenyl as test molecule for the acid sites of powdered titanium(IV) oxides: sensitivity of core levels to the local structure
- Pentylcyanobiphenyl was used successfully as a test molecule to show the acid sites upon some commercial nanoscaled titanium dioxide materials. The surface interactions were investigated in detail using methods sensitive to the surface or to the bulk material, e.g., X-ray photoelectron spectroscopy (XPS), infrared spectroscopy, and thermal analysis. Different oxidation states of surface Ti ions were revealed. Several species were found: the majority were bonded through the nitrogen lone pair of the cyano group, but bonding to the surface OH groups by benzene π electrons might also appear. The N 1s lines of adsorbed 5CB were able to distinguish between Lewis acid and relatively weak Brønsted acid sites.
Autor*innen: | F. Ungureanu, A.S. Manea, L. Frunza, S. Frunza, C.P. Ganea, F. Cotorobai, L. Diamandescu, Andreas SchönhalsORCiD |
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Dokumenttyp: | Zeitschriftenartikel |
Veröffentlichungsform: | Verlagsliteratur |
Sprache: | Englisch |
Titel des übergeordneten Werkes (Englisch): | Molecular crystals and liquid crystals: an internat. journal |
Jahr der Erstveröffentlichung: | 2012 |
Verlag: | Taylor & Francis |
Verlagsort: | Philadelphia, PA, USA |
Jahrgang/Band: | 562 |
Ausgabe/Heft: | 1 |
Erste Seite: | 200 |
Letzte Seite: | 217 |
Freie Schlagwörter: | Infrared spectra; Pentylcyanobiphenyl; Size dependence; Titanium dioxide; XPS |
DOI: | 10.1080/15421406.2012.697416 |
ISSN: | 1542-1406 |
ISSN: | 0026-8941 |
Verfügbarkeit des Dokuments: | Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access") |
Bibliotheksstandort: | Sonderstandort: Publica-Schrank |
Datum der Freischaltung: | 19.02.2016 |
Referierte Publikation: | Ja |
Datum der Eintragung als referierte Publikation: | 03.09.2012 |