High-Yield Synthesis of Well-Crystalline α-Fe2O3 Nanoparticles: Structural, Optical and Photocatalytic Properties
In this paper, the high-yield facile synthesis, detailed characterization and photocatalytic application of α-Fe2O3 nanoparticles are reported. The synthesis was done via simple hydrothermal process by using aqueous mixtures of iron chloride, hexamethylenediamine and NH3·H2O at 110 °C. The morphologies of the synthesized products were examined by using field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) which confirmed that the synthesized structures are almost spherical shaped nanoparticles with the average diameters of ∼35 ± 5 nm, and are grown in high yield. The detailed structural characterizations and composition of the as-synthesized nanoparticles were investigated by using X-ray diffraction (XRD), high-resolution TEM (HRTEM), energy dispersive spectroscopy (EDS) attached with FESEM and Fourier transform infrared spectroscopy (FTIR) which substantiated that the as-synthesized nanoparticles are well crystalline and pure α-Fe2O3. The UV-Vis absorption spectrum of the synthesized nanoparticles demonstrated the existence of two optical band gaps which correspond to direct and indirect transitions, respectively. The as-synthesized α-Fe2O3 nanoparticles exhibit good photocatalytic properties on photocatalytic degradation of methylene blue.
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Document Type: Research Article
Publication date: April 1, 2011
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