Intact Fe3O4/polyaniline (PANI) composite hollow microspheres were prepared by using hollow glass microspheres (HGS) as substrate. Fe3O4 nanoparticles were synthesized by adding surfactant of sodium dodecyl-benzenesulfonate (SDBS). HGS was pretreated by silane coupling agent, and consequently adsorbed magnetic iron oxide. A successive coating of polyaniline layer on HGS/Fe3O4 was involved through polymerization of aniline with HCl as dopant, and finally the multifunctional composite hollow microspheres (HGS/Fe3O4/PANI) were obtained.The morphology analysis by SEM revealed that the composite microspheres were formed by a layer of dense Fe3O4 nanoparticles and a layer of PANI on HGS. It was found that the conductivity of the prepared HGS/Fe3O4/PANI was about 10-3S/cm, and the magnetization was of 5.60 emu/g, indicating the composite microspheres were multifunctional with conductive and magnetic properties.
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