Heterogeneous activation of Oxone by CoxFe3−xO4 nanocatalysts for degradation of rhodamine B

► CoxFe3−xO4 magnetic nanoparticle showed high activities in Oxone for degradation of rhodamine B. ► Optimization of operating parameters on the decomposition of rhodamine B was investigated in the CoxFe3−xO4/Oxone process. ► Reaction mechanism and the stability of CoxFe3−xO4 NPs was studied.