BOWL-SHAPED POLY(3,4-ETHYLENEDIOXYTHIOPHENE)/-Fe2O3 COMPOSITES WITH ELECROMAGNETIC FUNCTION

In this paper, electromagnetic poly(3,4-ethylenedioxythiophene)/-Fe2O3 (PEDOT/-Fe2O3) micro-bowls, 1-2 mm in diameter, were prepared by a simple environment-friendly process. In this method, the aqueous solution of cetyltrimethylammonium bromide (CTAB) instead of any organic solvent was used. FeCl3 acted as a source of FeIII for the formation of -Fe2O3 and as an oxidant for the polymerization of 3,4-ethylenedioxythiophene (EDOT). The bowl-shaped morphology of PEDOT/-Fe2O3 composites was strongly influenced by the concentration of CTAB, FeCl2, ammonia solution and the reaction temperature. The saturation magnetization of PEDOT/-Fe2O3 micro-bowls increased with the increase of FeCl2 concentration and reached 6.20 Am2/kg at the FeCl2 concentration of 0.30 mol/L. The conductivity of the PEDOT/-Fe2O3 composites was in the range of 101 S/cm. The electrical and magnetic sources of PEDOT/-Fe2O3 micro-bowls were confirmed by SEM-EDX, TEM, XRD and XPS spectra. And the possible formation mechanism of PEDOT//-Fe2O3 was proposed.