Study on Magnetic Mn_(0.2)Co_(0.8)Fe_2O_4/Silicalite-2 Catalyst and its Electro-Catalytic Property

摘要

Silicalite-2 zeolite was hydrothermally synthesized and Mn_(0.2)Co_(0.8)Fe_2O_4 magnetic nano-particle based on the Silicalite-2 zeolite carrier was prepared by a coprecipitation-impregnation method. The morphologies and microstructures of synthesized samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM). The heterogeneous catalytic oxidation electrolysis system of Mn_(0.2)Co_(0.8)Fe_2O_4/silicalite-2 was built by dispersing the catalysts in glass reactor for treating cationic brilliant red X-5GN wastewater. The SEM images showed that the structure of silicalite-2 zeolite remained its original after the introduction of Mn_(0.2)Co_(0.8)Fe_2O_4 magnetic particle. The XRD patterns revealed that Mn_(0.2)Co_(0.8)Fe_2O_4 oxides could not be observed on the surface of the silicalite-2 zeolite carrier. The experimental results showed that the dye wastewater with a satisfied decolorization rate (79.1%) was obtained when the initial pH was 6, the magnetic catalyst dosage was 0.4g/L, the electrolysis voltage was 2V, electrolytic time was 45min, respectively.