Silver nanoparticles supported on modified montmorillonite clay (Ag-NPs@mont), were utilized as catalyst for the Baeyer-Villiger oxidation of various ketones with hydrogen peroxide as an oxidant under solvent free condition at room temperature. The modification of Montmorillonite K10 clay was carried out with HCl under controlled conditions for generating a high surface area porous matrix which acts as support for the in situ generation of Silver nanoparticles. The synthesized nanocomposite material was characterized by UV-Visible spectroscopy, powder XRD, SEM-EDX, TEM and N-2 adsorption-desorption analysis. The catalyst can be recycled and reused several times without significant loss of their catalytic activity. [GRAPHICS] .