NiFe2O4/SiO2/NiO magnetic was successfully synthesized using NiFe2O4, SiO2, and NiO as the core, interlayer, shell, respectively. under UV light irradiation used for photocatalytic degradation of methyl orange dye with different pH, catalyst dose, initial concentration. This composite characterized by X-ray Diffraction (XRD), Fourier Transform Infra-Red (FTIR), Scanning Electron Microscopy-Elec...