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Ren L.-R.,Shanxi Institute of Coal CAS Chemistry | Ren L.-R.,University of Chinese Academy of Sciences | Ren L.-R.,National Engineeing Laboratory for Indirect Coal Liquefaction | Yan L.,Synfuels China Co. | And 11 more authors.
Chinese Journal of Inorganic Chemistry | Year: 2012

Goethite (a-FeOOH) nanorods with uniform sizes were successfully prepared by hydrothermal method in alkaline solutions at 120 °C. The effects of Mn-dopant on the phase structure and morphology were investigated systematically using X-ray diffraction (XRD), mossbauer spectroscopy (MES), fourier transform infrared spectroscopy (FTIR), field-emision scanning electron microscopy (FE-SEM), and high-resolution transmission electron microscope (HRTEM). It was found that the concentration of Mn2+ ion plays an important role in modulating the morphology and phase structure of a-FeOOH. The aspect ratio of nanorods increases with Mn ion concentration increasing. When the atomic ratio of Mn ion and Fe ion (nMn(II)/nFe(III)) is 0.30, the α-(Fe,Mn) OOH and MnFe2O4 mixture was formed with the morphology of irregular nanorods and nanoparticles. Source

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