Synthesis and characterization of nanoparticles core@shell Fe3O4- ZnO for photodegredation Eosin B

In this study, the photocatalytic properties of the Fe3O4@ZnO core / shell nanoparticles have been investigated. The production of these nanoparticles in order to degradation of the chemical contaminants in the effect Light radiation is possible. For this purpose, nanoparticles of pure ZnO and magnetic nanoparticles of Fe3O4 @ ZnO core / shell were synthesized in a sedimentary method. The structure, morphology and photocatalytic performance of these nanoparticles were investigated by X-ray, X-ray diffraction scanning electron microscopy (SEM) and spectrophotometer (UV-Vis), respectively. The reduction in the size of the ZnO particles, which, as a n-type semiconductor with a width of 3.2eV, does not only increase the reactive level to absorb light, but also increases the physical, chemical and optical properties. In order to reuse zinc oxide and due to the difficulty of separating it in order to degrade the photocatalytic colors, we decided to apply magnetic properties to restore this valuable material, because Fe3O4 nanoparticles have extraordinary magnetic properties. And it catalyzes the catalyst and restores it. After making various molar percentages of 1: 4 _1: 5 _1: 8_ 1: 10 1: 15, from Fe3O4 @ ZnO nanoparticles , the molar ratio of 1:15 was selected as the optimum percentage. Because in addition to maintaining its magnetic properties, it increased the photocatalytic properties of nanoparticles of zinc oxide. After performing the experiments under the same conditions and continuing the experiments with this optimal percentage, we achieved a maximum degradation value of 98% in 90 min, which is compared to the pure nanoparticles of ZnO under identical conditions, 60 per cent showed a favorable trend in testing