Preparation and magnetic property of multi-walled carbon nanotube/α-Fe2O3 composites

摘要

In order to attain new functional nanomaterials with good magnetic property,multi-walled carbon nanotubes/hematite (MWNTs/α-Fe2O3) composites were synthesized using the co-deposition method.MWNTs/α-Fe2O3 composites were characterized by X-ray diffractometry (XRD),scanning electron microscopy (SEM),transmission electron microscopy(TEM),Raman spectroscopy and vibrating sample magnetometry (VSM).The experimental results show that the structure and magnetic properties of the MWNTs/α-Fe2O3 composites are related to the heat treatment temperature.MWNTs are modified by α-Fe2O3 nano-particles and α-Fe2O3 nanorods with a diameter of 10-50 nm after being treated at 450 °C.When the heat treatment temperature exceeds 600 °C,MWNTs are only modified by Fe3O4 particles.Furthermore,the MWNTs composites treated at 450 °C and 600 °C have good magnetic behaviour.