Preparation and photocatalytic properties of magnetically separated nitrogen-doped TiO2

A magnetically separated nitrogen-doped photocatalyst TiO2-xNx/SiO2/NiFe2O4 (TSN) with a typical ferromagnetic hysteresis was prepared by a simple process: the magnetic SiO2/NiFe2O4 (SN) dispersion and the visible-light-active photocatalyst TiO2-xNx were mixed, sonificated, dried, and calcined. The catalyst shows a photocatalytic activity for the degradation of methyl orange in water under visible light irradiation (lambda > 400 nm). X-ray diffractometer(XRD) and transmission electron microscope(TEM) were used to characterize the structure of photocatalyst TSN. The results indicate that the magnetic SN nanoparticles adhered to the surface of TiO2-xNx congeries. The degradation experiments of methyl orange indicate that the thin SiO2 tween NiFe(2)O(2)and TiO2-xNx could improve the photocatalytic activity of TSN.