Abstracts Category : Other

Titania and silica based hybrid porous nanomaterials : from synthesis to applications : Nanomateriaux hybrides poreux base de silice et de dioxyde de titane : de la synthse aux applications

by Pengkun Chen

Mon doctorat se focalise sur la synthse, la caractrisation et les applications de matriaux poreux base de silice, dioxyde de titane et zolite. La silice poreuse, le dioxyde de titane et les zolites ont t synthtiss en utilisant des mthodologies diffrentes. Des matriaux de silice fonctionnaliss ont t utiliss pour des applications en adsorption de colorant, ce qui est utile pour le traitement de l'eau. Un nouveau systme rticul et un nouveau dispositif ont t crs pour amliorer la capacit d'adsorption et pour le traitement dune grande quantit d'eau. En tirant parti des pores, une nouvelle mthode de formation de clusters de Cu (0) a t tablie. Les proprits photophysiques ont t tudies, en utilisant plusieurs sources de cuivre et diffrents matriaux poreux. L'utilisation du confinement pour la dtection de petites molcules biologiques tels que les neurotransmetteurs a t dmontre. Plusieurs applications ont t dveloppes sur la base de ces rcepteurs de neurotransmetteurs artificiels. Un matriau de titane msoporeux multifonctionnalis a t utilis pour les applications en biologie. En comparaison avec la silice, plus couramment utilise, sa photoactivit pourrait apporter des avantages supplmentaires. Finalement, de nouveaux types de matriaux de type organotitanes hybrides ont t dvelopps, et leurs proprits photo-catalytiques ont t dmontres. My PhD research focus on the synthesis, characterization and applications of silica, titania and zeolite based porous materials. Porous silica, titania and zeolite have been synthesized using different methodologies. Functionalized silica materials have been used for dye adsorption application which is useful for water treatment. A new cross-linked system and device have been created to enhance the adsorption ability and for large quantity of water treatment. By taking advantage of the pores, new method for Cu(0) cluster formation have been established. The photophysics of the Cu(0) clusters reduced from different copper source in different porous materials has been investigated. The use of the confinement for sensing has been demonstrated for small bio molecules, such as neurotransmitters. Several applications have been developed based on this artificial neurotransmitter receptors. Multi-functionalized mesoporous titania material has been used for bio-applications. Compare to the widely used silica material, its photoactivity could bring extra advantages. Finally, new types of hybrid organotitanium materials have been developed and their photocatalytic properties have been investigated.Advisors/Committee Members: De Cola, Luisa (thesis director).