Abstract
A facile method of synthesizing polycrystalline rod-like γ-Fe2O3 from inexpensive, nontoxic precursors FeC2O4 via a thermal decomposition reaction of 300–500°C for 1 h has been developed. A ligand directed growth mechanism was proposed for the magnetic anisotropic structure formation and the aspect heat treatment temperatures change. The morphology and structure of the synthesized rod-like γ-Fe2O3 were characterized by X-ray diffraction (XRD), field emission scanning electron microscope (FESEM) and transmission electron microscope (TEM). The results show that these rod-like γ-Fe2O3 presents cubic structure and typical diameters of 1.0–2.0 μm with a self-assembly of nanoparticles and average diameter of about 36 nm. The as-prepared rod-like γ-Fe2O3 have a high surface area of about 102.03 m2/g. Compared with previous methods; this present method shows an easy processing and can be applied on the large-scale produce of rod-like γ-Fe2O3.
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