Preparation for Magnetic Nanoparticles Fe 3 O 4 and Fe 3 O 4 @SiO 2 and Heterogeneous Fenton Catalytic Degradation of Methylene Blue

Dyestuff textile wastewater treatment has become a research hotspot due to its high chroma, poor biodegradability, and low toxicity characteristics. In this paper, we have synthesized magnetic Fe 3 O 4 and core‐shell Fe 3 O 4 @SiO 2 materials by hydrothermal methods. These materials were characterized by XRD, TEM, N 2 adsorption‐desorption and so on. These materials’ heterogeneous Fenton has been applied to dye wastewater treatment. Methylene blue was used as a typical target of dye wastewater. Decolorization ratios of methylene blue were determined by different nanostructure composites catalysts. A serious of results of study showed that decolorization ratios of magnetic nanoparticles and core‐shell composites arrived at above 90 % under the weakly acidic or neutral conditions and room temperature. When these catalysts were reused, the results show that Fe 3 O 4 @SiO 2 materials were possessed with good cycle performance.