科研之友
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摘要
Fe-ethylene glycol (Fe-EG) complex was synthesized using a facile and surfactant-free solvothermal method, and was characterized by field emission scanning electron microscopy (SEM), bright field transmission electron microscopy(TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), thermal gravimetric analysis (TGA) and X-ray photoelectron spectroscopy (XPS). The obtained Fe-EG complex was an excellent candidate for synthesis of various iron oxides micro/nanostructures by a simple calcination approach. In an air atmosphere, gamma-Fe2O3, gamma-Fe2O3/alpha-Fe2O3 nanocomposites, and alpha-Fe2O3 micro/nanostructures were successfully prepared by controlling the calcination temperature. Fe3O4 micro/nanostructures were also synthesized by calcination the Fe-EG complex under an argon atmosphere. The magnetic properties of the obtained series of iron oxides micro/nanostructures were studied, and the saturation magnetisation of the obtained gamma-Fe2O3 and Fe3O4 were 65.91 and 100.20 emu g(-1), respectively. The results of the work put forward a simple and effective approach for the synthesis of iron oxides micro/nanostructures with controlled chemical composition and good magnetic properties.
