Metalloporphyrins immobilized on CeO2@SiO2 core-shell nanoparticles were synthesized by a double-coating method and used for catalytic oxidation of diphenyl methane. A variety of characterization techniques including FT-IR, UV-vis, SEM, TEM, XRD, N-2 adsorption-desorption and TGA were employed. The results show that the catalyst consists of regular nanoparticles (around 400 nm) with core-shell structure and metalloporphyrins were immobilized on CeO2@SiO2 core-shell nanoparticles via amide bonds. Moreover, these new developed catalysts for solvent-free selective oxidation of diphenyl methane exhibited an excellent catalytic activity, selectivity and stability. Furthermore, these catalysts could be reused 6 times without significant loss of their catalytic activity and the used catalysts maintained nearly the same physicochemical properties as the fresh. (C) 2011 Elsevier B.V. All rights reserved.