In this paper,we report a simple chemical reduction method for synthesis of spherical Ag nanoparticles (average
size ~7 nm)with in mesoporous alumina matrix. Shape and size of the Ag nanoparticles and structure of the catalysts
are investigated by using high resolution transmission electron microscopy, diffuse reflectance spectroscopy,
N2 adsorption-desorption analysis, XRD and particle size analysis. The synthesized catalysts possess BET
surface area of 281.6 m2/g and average pore size 6.38 nm. The synthesized Ag nanoparticle loaded mesoporous
aluminas exhibit catalytic activity for the reduction of 4-nitrophenol to 4-aminophenol.