Synthèse Verte et application de Nanocomposites silice argent

Abstract

Nanostructural metal particles in the form of quantum dots have attracted the interest of many scientists, in recent years due to their unique properties attributed to quantum confinement or surface effects, which underlie their future applications in catalysis as well as in miniaturized electronic and optical devices. Hexagonal MCM-41 mesoporous silica is one of the commonly used hosts for the incorporation of silver nanoparticles, which provide pore channels and are suitable for the confinement of ultrathin metal nanostructures in its channels. Ag nanoparticles were confined inside the pore channels of MCM-41 by the biologicalin situ reduction method. XRD and UV-vis absorption spectroscopy were used to characterizethe MCM41-AgNPs composites. These MCM41-AgNPs catalysts showed excellent catalytic activity to remove the dyecompared to its absence in the reaction medium, the position of the plasmon band is between650 and 675 nm