Structural and magnetic properties of porous FexOy nanosheets and nanotubes fabricated by electrospinning

Abstract 2D porous α-Fe 2 O 3 nanosheets and 1D porous Fe x O y nanotubes were synthesized using electrospinning technique under different conditions. XRD results show that the α-Fe 2 O 3 nanosheets are pure α-Fe 2 O 3 phase, and the Fe x O y nanotubes are mainly composed of α-Fe 2 O 3 phase accompanied by weak Fe 3 O 4 phase. The EDX mappings demonstrate that the elements of O and Fe were uniformly distributed in nanosheets and nanotubes. The valence of iron ion is pure 3 + in the α-Fe 2 O 3 nanosheets, and it shows 3 + with a small amount of 2 + in the Fe x O y nanotubes. Magnetic properties of the synthesized samples were studied by vibrating sample magnetometer and Mossbauer spectrometer, the results show that the α-Fe 2 O 3 nanosheets have the room temperature ferromagnetism and the Fe x O y nanotubes have a higher saturation magnetization of 18.91 emu/g. Mossbauer spectrometer proved further the microstructure of nanosheets and nanotubes, which are consistent with the results of XPS. Our results will be helpful for the application of nanoporous materials.