Hydrothermal Synthesis and Magnetic Property of Monodisperse Plate-Like α-Fe2O3 Nanoparticles

Abstract

Monodisperse plate-like α-Fe2O3 nanoparticles have been successfully prepared by hydrothermal synthetic route using Fe(NO3)3, NaOH, and KBH4 reacted at 180°C for 12 h. From the investigation of X-ray diffraction and FT-IR spectra, the α-Fe2O3 nanoparticles can be directly prepared by the hydrothermal method. Transmission electron microscope and scanning electron microscope observation revealed that the α-Fe2O3 nanoparticles had average diameters were about 150 nm. Magnetic properties have been detected by a vibrating sample magnetometer at room temperature. The nanoparticles exhibited a ferromagnetic behavior and the coercive force (Hc), saturation magnetization (Ms), and remanent magnetization (Mr) were 344.75 Oe, 0.534 emu/g, and 0.012 emu/g, respectively.