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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]
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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

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References

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