
FT-IR spectra of synthesized polystyrene.

FT-IR spectra of nanocomposites with different Fe content: 6.5 % (a), 22.5 % (b) and 39.9 % (c).

Ratio of the peaks in the range of 1492 cm–1 to 570 cm–1 in the FT-IR spectra versus ICP results.

XRD pattern of Fe3O4 nanoparticles.

FESEM image of Fe3O4 nanoparticles.

FESEM images of nanocomposite containing 6.4 % (a) and 39.9 % (b) Fe3O4.

Cyclic voltammograms of polystyrene/Fe3O4 nanocomposite containing 39.9 % (a), 22.5 % (b), 16.4 % (c) and % (d) Fe.

Magnetization curves of nanocomposite containing 0.1 g (a) and 0.8 g (b) Fe3O4 nanoparticles.