Enhanced Catalytic Peroxymonosulfate Activation over Carbon Shell Encapsulating Cobalt Ferrite via Radical and Nonradical Routes

A well-defined carbon shell encapsulating CoFe2O4 deliver superior performance in catalytic PMS activation for organics degradation with reaction rate constant of 0.269 min-1, 4.7 times of the hollow CoFe2O4 and 2.7 times of the solid carbon spheres encapsulated one. This is attributed to the comprehensive effects of the Co2+ and C=O active sites for free radical and nonradical mechanisms. This nanostructured material outperformed most of the carbon- or CoFe-based catalysts.