In the present work, multi-walled carbon nanotubes (MWCNTs) were used as support material for impregnation of metallic nanoparticles (MNPs) produced by green synthesis. The influences plant extracts (pomegranate (Punica Granatum), Eucalyptus, and pecan (Carya illinoinensis, leaves), metal species (copper iron), concentrations, type functionalization (OH COOH) on characteristics obtained materia...