For comparison,another two compositions of PPy/Fe 3O4 nanocom posite were also prepared using method described above by varying the amount (0.2 g and 0.6 g) of Fe3O4 nanoparticles in the nanocomposite.The nanocomposites, synthesized with 0.2 g,0.4 g and 0.6 g of Fe3O4 nanoparticles were designated as NC1,NC2 and NC3,respectively.