[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.
Research center :
Laboratoire de Chimie Inorganique Structurale (LCIS, ULiège) Groupe de Recherche en Energie et ENvironnement à partir des MATériaux (GREEnMat, ULiège) Institut de Physique Nucléaire, Atomique et de Spectroscopie (IPNAS, ULiège)
Disciplines :
Chemistry Physics
Author, co-author :
Dubreuil, Olivier ; Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT
Dewalque, Jennifer ; Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT
Chene, Grégoire ; Université de Liège - ULiège > Département de physique > Physique nucléaire, atomique et spectroscopie
Mathis, François ; Université de Liège - ULiège > Centre européen en archéométrie
Spronck, Gilles ; Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT
Strivay, David ; Université de Liège - ULiège > Département de physique > Physique nucléaire, atomique et spectroscopie
Cloots, Rudi ; Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT
Henrist, Catherine ; Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT
Language :
English
Title :
TiO2 mesoporous thin films studied by Atmospheric Ellipsometric Porosimetry: A case of contamination
Publication date :
2011
Journal title :
Microporous and Mesoporous Materials
ISSN :
1387-1811
eISSN :
1873-3093
Publisher :
Elsevier Science
Volume :
147
Pages :
1-8
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
PHOTOCEL-0616464/0616465 - INANOMAT-P6/17
Funders :
DGTRE - Région wallonne. Direction générale des Technologies, de la Recherche et de l'Énergie [BE]
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