In this thesis, copper and nickel complexes were synthesized by three dentate Schiff base ligands (ONO) with the general structure of [NiL(DMF)] and [CuL(DMF)] which L is 1-((2-amino-nitrophenylimino) methyl) naphthalene and characterized by FT-IR Spectroscopy. Then, [NiL(DMF)]/TiO 2 , [NiL]/TiO 2 /PPh 3 , [NiL]/TiO 2 /PBu 3 , [CuL(DMF)]/TiO 2 , [CuL(DMF)]/KIT-5, [CuL]/TiO 2 /PPh 3 and [CuL]/ KIT-5/PPh 3 catalysts were prepared from synthesized complexes, titanium dioxide nanoparticles, mesoporous silica KIT-5 and phosphine and characterized by FT-IR, XRD and FE-SEM methods. Afterwards, their catalytic activity in the reduction of para and ortho-nitrophenol to para and to ortho-aminophenol was followed via UV-Vis spectroscopy and their recyclability were investigated. The results showed that [NiL(DMF)]/TiO 2 and [CuL]/KIT-5/PPh 3 catalysts possess a higher efficiency in para and ortho-nitrophenol reduction respectively.