A novel magnetic silica supported spinel ferrites NiFe2O4 catalyst for heterogeneous Fenton-like oxidation of rhodamine B

A series of spinel ferrites magnetic nanoparticles NiFe₂O₄ were synthesized as the heterogeneous Fentonlike catalyst by hydrothermal method and then NiFe₂O₄@SiO₂ catalysts were obtained by the modification of NiFe₂O₄ via micro emulsion method. XRD, VSM, FTIR, SEM, TEM, BET and XPS were carried to analyze the difference between the above two catalysts. NiFe₂O₄@SiO₂ catalyst exhibited the higher catalytic activity than NiFe₂O₄ for the degradation of Rhodamine B owe to the outer SiO₂ layers surface, the more important is both of them showed the better catalytic performance when at neutral pH environment.