Fabrication of Magnetic Fe3O4 Nanotubes by Electrospinning

摘要:

利用静电纺丝法制备复合纤维前躯体，将前躯体烧结、还原后成功得到了Fe3O4纳米管。研究了电纺工艺参数（PVA浓度、电压、接收距离）对复合纤维前躯体的影响。采用XRD、SEM、TEM等手段对纳米管的物相、形貌进行表征，同时通过改变烧结工艺研究了Fe3O4纳米管的形成机理，并且研究了Fe3O4纳米管的磁性能。结果表明：纳米管均匀、连续，外径和内径分别大约为100和50 nm；Fe3O4纳米管的磁饱和强度、矫顽力和剩磁强度分别为54.2 A·m2/kg，215×79.6 A/m和12.8 A·m2/kg。

Abstract:

Ferroferric oxide nanotubes were prepared by calcining and reducing the composite nanofiber precursors fabricated by electrospinning. Influences of the electrospun parameters (PVA concentration of solution, applied voltage and collector distance) on the preparation of the composite nanofiber precursors were discussed. The structural properties of the obtained nanotubes were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The formation mechanism of the Fe3O4 nanotubes was investigated through the nonequilibrium heat-treatment procedure. Furthermore, the magnetic property of Fe3O4 was measured using a vibrating sample magnetometer. Results reveal that the tubes show a uniform and continuous morphology, whose outer and inner diameters are about 100 nm and 50 nm, respectively. Fe3O4 possesses saturation magnetization (Ms) of 54.2 A·m2/kg, coercivity (Hc) of 215×79.6 A/m and remanent magnetization (Mr) of 12.8 A·m2/kg, respectively.