Ahmad, M. I. ; Fasel, C. ; Mayer, T. ; Bhattacharya, S. S. ; Hahn, H. (2011)
High temperature stability of nanocrystalline anatase powders prepared by chemical vapour synthesis under varying process parameters.
In: Applied Surface Science, 257 (15)
doi: 10.1016/j.apsusc.2011.02.121
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Systematic variation in the high temperature stability of nanocrystalline anatase powders prepared by chemical vapour synthesis (CVS) using titanium (IV) isopropoxide under varying flow rates of oxygen and helium was obtained by progressively shifting the decomposition product from C3H6 to CO2. The as-synthesised powders were characterised by high temperature X-ray diffraction (HTXRD), simultaneous thermo-gravimetric analyses (STA), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). It was observed that the anatase to rutile transformation temperature progressively increased for samples synthesised at higher O2/He flow rate ratios. The improved anatase stability was attributed to the presence of incorporated carbon within the titania structure and confirmed by a high temperature carbon desorption peak.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2011 |
| Autor(en): | Ahmad, M. I. ; Fasel, C. ; Mayer, T. ; Bhattacharya, S. S. ; Hahn, H. |
| Art des Eintrags: | Bibliographie |
| Titel: | High temperature stability of nanocrystalline anatase powders prepared by chemical vapour synthesis under varying process parameters |
| Sprache: | Englisch |
| Publikationsjahr: | 15 Mai 2011 |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Applied Surface Science |
| Jahrgang/Volume einer Zeitschrift: | 257 |
| (Heft-)Nummer: | 15 |
| DOI: | 10.1016/j.apsusc.2011.02.121 |
| Kurzbeschreibung (Abstract): | Systematic variation in the high temperature stability of nanocrystalline anatase powders prepared by chemical vapour synthesis (CVS) using titanium (IV) isopropoxide under varying flow rates of oxygen and helium was obtained by progressively shifting the decomposition product from C3H6 to CO2. The as-synthesised powders were characterised by high temperature X-ray diffraction (HTXRD), simultaneous thermo-gravimetric analyses (STA), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). It was observed that the anatase to rutile transformation temperature progressively increased for samples synthesised at higher O2/He flow rate ratios. The improved anatase stability was attributed to the presence of incorporated carbon within the titania structure and confirmed by a high temperature carbon desorption peak. |
| Freie Schlagworte: | Phase transition, Anatase, Chemical vapour synthesis, High temperature X-ray diffraction |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Gemeinschaftslabor Nanomaterialien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Oberflächenforschung 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 04 Apr 2012 11:13 |
| Letzte Änderung: | 26 Mär 2015 10:16 |
| PPN: | |
| Sponsoren: | DAAD, Bonn, Germany providing the financial support, Alexander von Humboldt Foundation, Bonn, Germany for providing financial support for a one-month stay for S.S. Bhattacharya |
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