Synthesis of Zinc oxide nanostructures with iron impurities by sol-gel method and investigation of its properties

In this paper, the effect of impurity injection on the structural, optical and magnetic properties of ZnO nanostructures prepared by sol-gel method was investigated. The Ultraviolet spectroscopy (UV-Vis), X-ray diffractometer (XRD), scanning electron microscopy (SEM) and vibrometer magnetometer (VSM) were used to analyze the samples. The experimental results showed that the addition of impurities caused the displacement of the adsorption peak and the reduction of the band gap. From the XRD spectrum, it appears that all specimens are formed in the Versatite structure. No additional peaks are seen in the spectrum, indicating complete phase formation without creating any secondary phases. The absence of additional peaks indicates the high solubility of iron in oxidation, and the results show that the addition of impurities increased the size of the nanocrystals, while the increase in the percentage of impurities did not affect the size of the nanocrystals. Also, iron impurity has caused ferromagnetic properties in the samples so that with increasing the amount of impurity, the induction field decreases. Ultraviolet spectroscopy (UV-Vis), scanning electron microscopy (SEM) and vibrometer magnetometer (VSM) were used to analyze the samples.