Optimisation of the surface properties of SBA-15 mesoporous silica for in-situ nanoparticle synthesis
Language
en
Article de revue
This item was published in
Microporous and Mesoporous Materials. 2009, vol. 120, n° 1-2, p. 2-6
Elsevier
English Abstract
Various methods proposed for preparing nanoparticles within porous matrices involve generally the impregnation of the matrix with a solution of precursors followed by reduction based on chemical, thermal, radiolytic, or ...Read more >
Various methods proposed for preparing nanoparticles within porous matrices involve generally the impregnation of the matrix with a solution of precursors followed by reduction based on chemical, thermal, radiolytic, or photochemical process. In most cases, the amount of solution impregnated is small and not uniformly distributed in the matrix, with a yield less than 30% and concentrated around the matrix surface. We have developed a novel method for preparing composite materials, combining impregnation under partial vacuum with radiolytic reduction. This method has enabled us to obtain SBA-15 mesoporous silicas with 50–70% impregnation and to control the nanoparticle size.Read less <
English Keywords
TEM
Mesoporous silica
Bismuth nanoparticles
Radiolysis
XPS
Origin
Hal imported