Hostname: page-component-cd9895bd7-dzt6s Total loading time: 0 Render date: 2024-12-27T02:35:52.915Z Has data issue: false hasContentIssue false
  • English
  • Français

Chemical Characterization by FT-IR Spectrometry and Modification of the Very First Atomic Layer of A TiO2 Nanosized Powder

Published online by Cambridge University Press:  03 September 2012

M.-I. Baraton ,
L. Merhari ,
F. Chancel  and
J. Tribout
M.-I. Baraton
Affiliation:
LMCTS, Faculté des Sciences, 123 avenue Albert Thomas, F-87060 Limoges cedex, (France), [email protected]
L. Merhari
Affiliation:
CERAMEC R&D, 64 avenue de la Libération, Limoges, F-87000, (France)
F. Chancel
Affiliation:
LMCTS, Faculté des Sciences, 123 avenue Albert Thomas, F-87060 Limoges cedex, (France), [email protected]
J. Tribout
Affiliation:
LMCTS, Faculté des Sciences, 123 avenue Albert Thomas, F-87060 Limoges cedex, (France), [email protected]
Get access

Abstract

Nanosized powders exhibit high specific surface areas resulting in enhanced reactivities. Surface tailoring by controlled adsorption of molecules can thus be conveniently performed and more easily monitored by surface-sensitive techniques. In situ and ex situ grafting procedures of hexamethyldisilazane (HMDS) on nanosized titania (n-TiO2) powder were carried out and studied by Fourier transform infrared spectrometry (FT-IR). In addition to a decrease of the hydrophilic OH groups, the vibration analysis revealed hydrophobic CH3 groups on the grafted samples. Co-adsorption of CO and H2O on the differently grafted samples showed a large reduction of water effect compared to the as-received n-TiO2 powder. Modulation of infrared transmitted energy by controlled adsorption of O2 and CO made it possible to qualitatively compare the electronic properties of the surface-tailored samples.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 448: Symposium M – Control of Semiconductor Surfaces and Interfaces , 1996 , 81
Copyright
Copyright © Materials Research Society 1997

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1 Harrick, N.J. in Internal Reflection Spectroscopy, Interscience, Wiley, New York, 1967. Second printing by Harrick Scientific Corporation, Ossining, N.Y. 1979, and references therein.Google Scholar
2 Heinrich, V.E. and Cox, P. A. in The Surface Science of Metal Oxides, Cambridge University Press, 1994, and references therein.Google Scholar
3 Baraton, M.-I., J. High. Temp. Chem. Processes 3, 545 (1994).Google Scholar
4 Baraton, M.-I., Sensors Actuators B 31 (1–2), 33–38 (1996).Google Scholar
5 Baraton, M.-I., Chancel, F. and Merhari, L., Nanostruct. Mat. (1996), in press.Google Scholar
6 Chabal, Y.J., Surface Science Reports, 8, 211 (1988).Google Scholar