| abstract |
The invention concerns a composite material consisting of a microporous or mesoporous matrix and metal or metal oxide nanoparticles. The material is characterized in that the matrix material is either disorganized, organized and optionally oriented, and in that the nanoparticles are i) monodispersed in size when the matrix material is organized and optionally oriented; ii) or monodispersed in size, or of size identical to that of the porosity of the matrix material, when said matrix material is disorganized. The method for preparing the material consists in impregnating a solid microporous or mesoporous material with a solution of nanoparticle precursors, then in reducing the precursors within the material forming the matrix. The impregnation is carried out under saturating vapour pressure and under reflux of the precursor solution, and the reduction is carried out by radiolytic process. |