Reference : TiO2 mesoporous thin films studied by Atmospheric Ellipsometric Porosimetry: A case o...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/89728
TiO2 mesoporous thin films studied by Atmospheric Ellipsometric Porosimetry: A case of contamination
English
Dubreuil, Olivier mailto [Université de Liège - ULg > Département de chimie (sciences) > LCIS - GreenMAT >]
Dewalque, Jennifer mailto [Université de Liège - ULg > Département de chimie (sciences) > LCIS - GreenMAT >]
Chene, Grégoire mailto [Université de Liège - ULg > Département de physique > Physique nucléaire, atomique et spectroscopie >]
Mathis, François mailto [Université de Liège - ULg > > Centre européen en archéométrie >]
Spronck, Gilles mailto [Université de Liège - ULg > Département de chimie (sciences) > LCIS - GreenMAT >]
Strivay, David mailto [Université de Liège - ULg > Département de physique > Physique nucléaire, atomique et spectroscopie >]
Cloots, Rudi mailto [Université de Liège - ULg > Département de chimie (sciences) > LCIS - GreenMAT >]
Henrist, Catherine mailto [Université de Liège - ULg > Département de chimie (sciences) > LCIS - GreenMAT >]
2011
Microporous and Mesoporous Materials
Elsevier Science
147
1-8
Yes (verified by ORBi)
International
1387-1811
[en] Thin films ; Surface contamination ; Mesoporous anatase TiO2 ; Atmospheric Ellipsometric Porosimetry ; Photocatalytic activity
[en] Anatase mesoporous TiO2 thin films are frequently prepared by surfactant templating to control porosity
development and Atmospheric Ellipsometric Porosimetry is a reliable and fast technique allowing the
determination of the porosity of such films. After prolonged exposition to high-vacuum (6×10-6 mbar), the films porosity exhibits a degraded behavior during porosimetric measurements, indicating
a vacuum-induced modification. The main effect resulting from such exposition to high-vacuum is a wet-
tability modification of the films, resulting in an increase of the hydrophobic character of the TiO2 surface.
This evolution induces non-correct results in porosimetric measurements due to the fact that the contact
angle parameter needed to calculate the pore size distribution is highly different from the reference films.
A surface contamination explains such modifications and a restoration of the films is obtained by using
ultraviolet treatment.
Laboratoire de Chimie Inorganique Structurale (LCIS, ULg) ; Groupe de Recherche en Energie et ENvironnement à partir des MATériaux (GREEnMat, ULg) ; Institut de Physique Nucléaire, Atomique et de Spectroscopie (IPNAS, ULg)
Région wallonne : Direction générale des Technologies, de la Recherche et de l'Energie - DGTRE
PHOTOCEL-0616464/0616465 - INANOMAT-P6/17
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/89728
10.1016/j.micromeso.2011.04.013
Thin films
Surface contamination
Mesoporous anatase TiO2
Atmospheric Ellipsometric Porosimetry
Photocatalytic activity

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