Yolk-shell structured CoFe2O4 microspheres as novel catalysts for peroxymonosulfate activation for efficient degradation of butyl paraben

Three-dimensional yolk-shell structured CoFe2O4 microspheres were successfully prepared by hydrothermal method coupled calcination. The obtained magnetic yolk-shell microspheres exhibit excellent ability to activate peroxymonosulfate for efficient degradation of butyl paraben in wastewater followed by easy magnetic separation.