Degradation of methylene blue by Co3O4 with activation of bisulfite

Co3O4 was synthesized by hydrothermal method followed by calcination and theCo(3)O(4)/bisulfite system was investigated to degrade MB to determine the chemo-catalytic property of Co3O4. A removal rate of 93.9% was achieved in 2h with this system and the excellent stability and recyclability of Co3O4 was confirmed by recycling tests. The possible mechanism of chemo-catalytic degradation of dyes by Co(3)O(4 )was proposed.