Substituted Co–Cu–Zn nanoferrites: synthesis, fundamental and redox catalytic properties for the degradation of methyl orange

Co 0.6 Zn 0.4 Cu 0.2 M x Fe 1.8−x O 4 (M = Zn 2+ , Co 2+ , Ni 2+ and Mn 3+ . x = 0.2, 0.4, 0.6 and 0.8) magnetically recyclable catalysts have been synthesized via a sol–gel auto combustion method.