Reference : TiO2 mesoporous thin films studied by Atmospheric Ellipsometric Porosimetry: A case of c...

	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics Physical, chemical, mathematical & earth Sciences : Chemistry
	To cite this reference:	http://hdl.handle.net/2268/89728

Title :	TiO2 mesoporous thin films studied by Atmospheric Ellipsometric Porosimetry: A case of contamination
Language :	English
Author, co-author :	Dubreuil, Olivier [Université de Liège - ULg > Département de chimie (sciences) > LCIS - GreenMAT >]
	Dewalque, Jennifer [Université de Liège - ULg > Département de chimie (sciences) > LCIS - GreenMAT >]
	Chene, Grégoire [Université de Liège - ULg > Département de physique > Physique nucléaire, atomique et spectroscopie >]
	Mathis, François [Université de Liège - ULg > > Centre européen en archéométrie >]
	Spronck, Gilles [Université de Liège - ULg > Département de chimie (sciences) > LCIS - GreenMAT >]
	Strivay, David [Université de Liège - ULg > Département de physique > Physique nucléaire, atomique et spectroscopie >]
	Cloots, Rudi [Université de Liège - ULg > Département de chimie (sciences) > LCIS - GreenMAT >]
	Henrist, Catherine [Université de Liège - ULg > Département de chimie (sciences) > LCIS - GreenMAT >]
Publication date :	2011
Journal title :	Microporous & Mesoporous Materials
Publisher :	Elsevier Science
Volume :	147
Pages :	1-8
Peer reviewed :	Yes (verified by ORBi)
Audience :	International
ISSN :	1387-1811
Keywords :	[en] Thin films ; Surface contamination ; Mesoporous anatase TiO2 ; Atmospheric Ellipsometric Porosimetry ; Photocatalytic activity
Abstract :	[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 units :	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)
Funders :	Région wallonne : Direction générale des Technologies, de la Recherche et de l'Energie - DGTRE
Name of the research project :	PHOTOCEL-0616464/0616465 - INANOMAT-P6/17
Target :	Researchers ; Professionals ; Students
Permalink :	http://hdl.handle.net/2268/89728
DOI :	10.1016/j.micromeso.2011.04.013
Commentary :	Thin films Surface contamination Mesoporous anatase TiO2 Atmospheric Ellipsometric Porosimetry Photocatalytic activity

	File(s) associated to this reference
	Fulltext file(s): File Commentary Version Size Access Restricted access MICMAT-S-11-00201-2.pdf Author preprint 1.67 MB Request copy

All documents in ORBi are protected by a user license.

 

© ULg Library Network |  Feedback |  ORBi legal notices

Dspace v1.5