Abstract
A series of zinc (Zn) doped Fe3O4 nanoparticles with different Zn concentrations represented as ZnxFe3–xO4 (0 < x ≤ 1) were synthesized by the chemical coprecipitated technique mainly in the presence of sodium dodecyl benzene sulfonate (SDBS) as one of the surface modifiers. The prepared zinc-doped Fe3O4 nanoparticles were characterized by a vibrating sample magnetometer (VSM), wide-angle X-ray diffraction (WAXD), and transmission electron microscopy (TEM). The VSM measurements showed that magnetization vs applied magnetic field for zinc-doped particles showed an increasing curve with very small hysteresis and that the saturation magnetization (Ms) of ZnxFe3–xO4 reached a maximum 80.93 emu/g at x = 0.2. The experimental result exhibited that Zn0.2Fe2.8O4 nanoparticles coated with different surface modifiers give good dispersivity and outstanding stability in the organic dispersed phase compared with noncoated particles. The value of Ms decreased with further increase in x beyond 0.2. Such decreasing behav...
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