Octahedral-like magnetite was fabricated using an ethylenediamine tetraacetic acid (EDTA)-assisted route under mild conditions. The as-prepared powders were characterized in detail by conventional techniques such as X-ray diffraction (XRD) and scanning electron microscopy (SEM). On the basis of these methods, the growth mechanism was discussed. EDTA plays important roles in the formation of the products. This method can be easily controlled and is expected to be applicable for the preparation of other metal oxides with special morphologies. Also, the magnetic properties of the samples were characterized on a vibrating sample magnetometer (VSM). The sample exhibits a high first discharge capacity of 884 mAh/g, which enables it to be used for a lithiumion battery.
Novel hierarchical nanostructures of nickel, which were assembled by well-aligned hexagonal nanoplatelets,
were fabricated through a simple solution method. The process involved the reduction of nickel dimethylglyoximate with hydrazine under controlled conditions. Based on a series of contrast experiments, the formation
mechanism of the flowers was proposed, which could be ascribed to the cooperative effect of the complexant
of dimethylglyoxime, a proper reaction rate, and inherent magnetic interactions. The present work provided
an example for the synthesis of magnetic assembly nanostructures through properly selection of the reaction
conditions, which were independent of any surfactants or external magnetic field.
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