Projet de thèse en Chimie Séparative, Matériaux et Procédés
Sous la direction de Agnès Grandjean.
Cette thèse se propose de synthétiser des nanoparticules coeur-coquille pour décontaminer des effluents aqueux contaminés avec du césium radioactif. Il est ensuite prévu d'étudier le comportement de ces matériaux sous irradiation interne et/ou externe.
Synthesis of core-shell nanoparticles to entrap radioactive cesium
The topic oh this Ph-D is based on the synthesis and the study of core-shell nanoparticles able to entrap radioactive cesium. A sorption process of radioelements on inorganic solids, as silica monoliths, has already been described to capture radioactive cesium and to anchor it on a solid phase. Inorganic materials were therefore functionalized with Prussian Blue Analogous (PBA) nanoparticles (for example: K2Cu[Fe(CN)6]) that are well known to be highly selective towards Cs as described by J. Causse and al. (J. Mater. Chem. A, 2014, 2, 9461). However, these materials do not allow optimal Cs sorption because of strong aggregation of PBA nanoparticles. Thereby, to limit the aggregation, the solution developed is the use of core-shell nanoparticles; with a core made of PBA and a protective porous silica shell all around.