Abstract
Ni0.3Zn0.5Fe2O4/polyethylene glycol (PEG) hybrid hollow nanospheres have been successfully prepared using a facile synthesis method. Their shape, size and structure have been characterized by transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM) and X-ray diffraction (XRD). The determination from inductively coupled plasma (ICP) indicates that the atomic ratio of Ni/Zn/Fe is 3:5:20, the results from fourier transform infrared (FTIR) spectra and thermogravimetric analysis (TGA) show that the PEG is also contained by the nanospheres, and thus an expression of Ni0.3Zn0.5Fe2O4/PEG is presented. A formation mechanism is suggested according to FTIR, XRD, TGA, TEM and selected area electron diffraction (SAED) with different reaction time: 4, 6, 8, 10, and 12h. The magnetic measurement of the Ni0.3Zn0.5Fe2O4/PEG nanospheres reveals that the saturation magnetization is 86.26emug−1. The sample of 35% volume fraction (Ni0.3Zn0.5Fe2O4/PEG/paraffin containing Ni0.3Zn0.5Fe2O4/PEG nanospheres) exhibits a minimum reflection loss (RL) of −50.15dB at about 8.8GHz in the range of 2–18GHz. The Ni0.3Zn0.5Fe2O4/PEG nanospheres show unique morphology, favorable magnetism, as well as excellent microwave absorbing properties.
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