Abstract
Magnetic cobalt ferrites (CoFe2O4)/activated carbon (AC) nanocomposites were prepared by the hydrothermal method, and then the catalysis for potassium hydrogen persulfate (PMS) to degrade methylene blue (MB) was investigated. The results indicated that 9 wt% CoFe2O4 nanoparticles supplied the sufficient magnetic response for magnetic separation and activated PMS to generate SO4− radicals. The pore-structures of AC could adsorb the residual MB in high concentration near CoFe2O4 catalysts, and promoted MB degradation with SO4− radicals. CoFe2O4/AC nanocomposites presented the good stability and reusability. It was proved that the synergistic effect of PMS and CoFe2O4/AC nanocomposites could greatly improve the MB removal to 100% at the optimized conditions for 60 min.
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