ORBi: Bodson Céline - Relations entre la structure et la texture poreuse de xérogels de TiO2 dopés au phosphore et leurs propriétés photocatalytiques

Reference : Relations entre la structure et la texture poreuse de xérogels de TiO2 dopés au phosphor...


	Document type :	Scientific congresses and symposiums : Paper published in a book
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Chemistry Engineering, computing & technology : Chemical engineering Engineering, computing & technology : Materials science & engineering
	To cite this reference:	http://hdl.handle.net/2268/118834

Title :	Relations entre la structure et la texture poreuse de xérogels de TiO2 dopés au phosphore et leurs propriétés photocatalytiques
Language :	French
Alternative title :	[en] Relation between the structure and the texture of phosphorus doped TiO2 xerogels and their photocatalytic properties
Author, co-author :	Bodson, Céline [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Nanomatériaux et interfaces >]
	Cattoën, Xavier [ENSCM Montpellier > > > >]
	Bied, Catherine [ENSCM Montpellier > > > >]
	Wong Chi Man, Michel [ENSCM Montpellier > > > >]
	Pirard, Jean-Paul [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Génie catalytique >]
	Heinrichs, Benoît [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Nanomatériaux et interfaces >]
	Lambert, Stéphanie [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Génie catalytique >]
Publication date :	2011
Main document title :	Récents Progrès en Génie des Procédés, Lavoisier Technique et Documentation, Volume 101, 6 p. (CD-ROM)
Publisher :	Société Française de Génie des Procédés
Peer reviewed :	Yes
On invitation :	No
Audience :	International
ISBN :	2-910239-75-6
City :	Paris
Country :	France
Event name :	13e Congrès de la Société Française de Génie des Procédés
Event date :	29 novembre - 1e décembre 2011
Event organizer :	Société Française de Génie des Procédés
Event place (city) :	Lille
Event country :	France
Keywords :	[fr] Procédé sol-gel ; TiO2 ; porosité ; photocatalyse
Abstract :	[en] The sol-gel process is used to prepare phosphorus (P)-doped TiO2 xerogels by cogelation of Ti(O-iPr)4 with a functionalized P-based alkoxide : NH2-(CH2)2-NH-(CH2)2-P(O)-(OEt)2, in various alcohols. These xerogels were dried under vacuum at 150°C during 12 h, and calcined under air for 5 h at 350 °C, 450 °C, 550 °C and 650 °C. The samples obtained were characterized by X-ray diffraction, nitrogen adsorption-desorption isotherms and diffuse reflectance spectroscopy in UV/Vis region. The presence of phosphorus in the samples leads to a significant increase of their specific surface area, proportionally to the amount of phosphorus in the sample. Furthermore, the doping of the TiO2 by a phosphonate compound increases the thermal stability of the TiO2 and delays the phase transformation from amorphous to anatase. The diffuse reflectance measurements clearly show the translation of absorption peak of TiO2 towards the visible region when the content in phosphorus increases. Indeed, it is observed a degradation of the p-nitrophenol under visible light by using these P-doped TiO2 xerogels, which means that the P-doping enhances the photocatalytic activity in the visible region.
Funders :	Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS ; Fonds de la Recherche Fondamentale Collective - FRFC ; Interuniversity attraction pole IAP-P6/17 ; PHC Tournesol
Permalink :	http://hdl.handle.net/2268/118834

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