Elaboration of microporous CeO2 thin layers having nanocrystallites network controlled by Pluronic P123: Impact of key experimental parameters - Université de Montpellier Accéder directement au contenu
Article Dans Une Revue Journal of Sol-Gel Science and Technology Année : 2019

Elaboration of microporous CeO2 thin layers having nanocrystallites network controlled by Pluronic P123: Impact of key experimental parameters

Résumé

Microporous ceria thin films having nanocrystallites network were synthesized by evaporation-induced self-assembly process, using P123 amphiphilic copolymer as structure-directing agent. The impact of key experimental parameters, i.e., the sol ageing, the relative humidity (RH), the thermal treatment, on the thin layer elaboration were investigated. The results show that the organization of the nanoparticles is possible for a sol ageing time lower than 16 days and that the size of the mesophase within the thin layer increases with the relative humidity fixed during the film deposition. Finally, an increase of the thermal treatment temperature from 300 to 1000 °C leads to the formation of fluorite-like dioxide material coupled with a loss of nanocrystallites organization and porosity due to the increase of the size of the crystallites. This loss of nanocrystallites organization is more drastic in the direction perpendicular to the surface and less pronounced along the surface. Thus, a compromise between the crystallization and the preservation of the porosity needs to be found.

Domaines

Chimie Matériaux
Fichier non déposé

Dates et versions

hal-02445278 , version 1 (20-01-2020)

Identifiants

Citer

Zijie Lu, Diane Rebiscoul, Jérémy Causse, X. F Le Goff, Nicolas Mollard, et al.. Elaboration of microporous CeO2 thin layers having nanocrystallites network controlled by Pluronic P123: Impact of key experimental parameters. Journal of Sol-Gel Science and Technology, 2019, ⟨10.1007/s10971-019-05147-4⟩. ⟨hal-02445278⟩
51 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More