Photodegradation of azo dyes: photocatalyst and magnetic investigation of CoFe_2O_4-TiO_2-Ag nanocomposites

摘要

Abstract In the first step, CoFe~(2)O~(4)nanostructures were synthesized via a facile precipitation method without using any surfactant. The CoFe~(2)O~(4)-TiO~(2)nanocomposites were then prepared using the sol–gel method. The silver nanoparticles were produced by reducing silver nitrate (AgNO~(3)) with sodium borohydride (NaBH~(4)). By adding a reducing agent, CoFe~(2)O~(4)–TiO~(2)–Ag was produced by a simple precipitation method. The prepared products were characterized by X-ray diffraction and scanning electron microscopy. The vibrating sample magnetometer shows the ferromagnetic property of ferrite nanostructures. The photocatalytic behavior of the CoFe~(2)O~(4)–TiO~(2)–Ag nanocomposites was evaluated using the degradation of three dyes (acid violet, methyl orange, and acid blue) method ultraviolet light irradiation. The results showed a nanocomposite with an applicable magnetic and photocatalytic performance.