Fabrication and Characterization of Iron oxide Nanoparticles and Iron oxide / Silicon Core/Shell In The Presence of Cationic Surfactants and Their Application To Improve The Degradation of Diazinon in Aqueous Solutions

In this paper, we used magnetic nanoparticles to improve the degradation of the diazinon. For this purpose, Iron oxide nanoparticles (Fe3O4) were synthesized by modified hydrothermal method. Subsequently, we used ultrasonic method and put a shell of the nanoparticles of the SiO2 on it. The obtained nanoparticles were then characterization using X-ray diffraction (XRD), Fourier transform infrared (FT-IR), Vibrational Sampler Magnetic Meter (VSM), Scanning Electron Microscopy (SEM) and Transmission Electron Microscope (TEM), Which is x- ray diffraction pattern the inverse spinel structure of nanoparticles, The residual curve of the pure iron oxide sample showed 74 emu⁄(g )saturation magnetization and for the core-shell the saturation magnetization was 42emu⁄(g ). Result confirmed the paramagnetic properties. These nanoparticles exhibit superparamagnetic properties. The results of the transient electron microscope indicate the formation of this shell on iron oxide nanoparticles. Finally, these nanoparticles were used to degradation of diazinon in aqueous solution with different concentrations. Cetyltrimethylammonium bromide (CTAB) was used as an organic cationic surfactant to improve the degradation of diazinon.