期刊
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
卷 12, 期 3, 页码 2939-2942出版社
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2012.5684
关键词
Magnetic Materials; Microstructures; Oxidation
类别
资金
- National Key Program for Developing Basic Research [2010CB933903, 2007CB936104]
- NSFC [60927001, 60971045, 60801007, 41106091]
- Jiangsu Province Science and Technology project [BE2009147]
- Hunan Education Department
- Key Project in Hunan Science and Technology Pillar Program [2010SK2003]
Single-crystalline Fe3O4 microcubes were obtained through a green hydrothermal procedure using Fe3+, Fe2+ and H2O2 as starting materials. The structures and morphologies of the as-prepared samples were characterized in detail by X-ray diffraction (XRD), Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) respectively. Magnetite (Fe3O4) cubes averaging 3 mu m in diameter were synthesized by H2O2 oxidation of Fe3+ and Fe2+ under neutral conditions. The contrastive experiments were designed to elucidate the effects of Fe3+, Fe2+ and H2O2 on the morphology of the final products. Irregular and ellipsoidal Fe2O3 structures were obtained by H2O2 oxidation of Fe3+ and Fe2+ respectively. Meanwhile, Fe3O4 nanotubes and nanoparticles were obtained when H2O2 was replaced by NH4HCO3 and urea respectively. The results show that H2O2, Fe3+ and Fe2+ in the reactive system play critical roles in obtaining micrometric cube-like Fe3O4. While, other nanometric Fe2O3 and Fe3O4 particles with tube-like and other morphologies could also be developed by controlling the reaction parameters.
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