Reference : Relations entre la structure et la texture poreuse de xérogels de TiO2 dopés au phosp...
Scientific congresses and symposiums : Paper published in a book
Physical, chemical, mathematical & earth Sciences : Chemistry
Engineering, computing & technology : Chemical engineering
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/118834
Relations entre la structure et la texture poreuse de xérogels de TiO2 dopés au phosphore et leurs propriétés photocatalytiques
French
[en] Relation between the structure and the texture of phosphorus doped TiO2 xerogels and their photocatalytic properties
Bodson, Céline mailto [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 mailto [ENSCM Montpellier > > > >]
Pirard, Jean-Paul mailto [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Génie catalytique >]
Heinrichs, Benoît mailto [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Nanomatériaux et interfaces >]
Lambert, Stéphanie mailto [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Génie catalytique >]
2011
Récents Progrès en Génie des Procédés, Lavoisier Technique et Documentation, Volume 101, 6 p. (CD-ROM)
Société Française de Génie des Procédés
Yes
No
International
2-910239-75-6
Paris
France
13e Congrès de la Société Française de Génie des Procédés
29 novembre - 1e décembre 2011
Société Française de Génie des Procédés
Lille
France
[fr] Procédé sol-gel ; TiO2 ; porosité ; photocatalyse
[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.
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
http://hdl.handle.net/2268/118834

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