Preparation of Coral-Like α-Fe2O3 Nanostructures and Magnetic Properties
Coral-like α-Fe2O3 nanostructures modified by surfactant CTAB have been successfully obtained via a solvothermal process by using FeCl3 6H2O and oxalic acid as the starting materials. The coral-like α-Fe2O3 nanostructures with good-crystalline consist of well-aligned α-Fe2O3 nanoflakes with an average thickness of about 40 nm growing radially from the center of the nanostructures. The obtained products are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), superconducting quantum interference device magnetometer (SQUID). Magnetic hysteresis measurements indicate that coral-like α-Fe2O3 superstructures show a normal ferromagnetic behavior with the remanence and coercivity of 0.2346emu/g and 1862Oe at room temperature. CTAB, the reaction temperature and solvent played an important role in controlling the final morphology of the products.
Jianmin Zeng, Taosen Li, Shaojian Ma, Zhengyi Jiang and Daoguo Yang
H. Wang et al., "Preparation of Coral-Like α-Fe2O3 Nanostructures and Magnetic Properties", Advanced Materials Research, Vols. 194-196, pp. 625-628, 2011