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A novel coupled system using Co-TiO2 was successfully designed which combined two different heterogeneous advanced oxidation processes,sulfate radical based Fenton-like reaction (SR-Fenton) and visible light photocatalysis (Vis-Photo),for degradation of organic contaminants.The synergistic effect of SR-Fenton and Vis-Photo was observed through comparative tests of 50 mg/L Rhodamine B (RhB) degradation and TOC removal.The Rhodamine B degradation rate and TOC removal were 100％ and 68.1％ using the SR-Fenton/Vis-Photo combined process under ambient conditions,respectively.Moreover,based on XRD,XPS and UV-DRS characterization,it can be deduced that tricobalt tetroxide located on the surface of the catalyst is the SR-Fenton active site,and cobalt ion implanted in the TiO2 lattice is the reason for the visible light photocatalytic activity of Co-TiO2.Finally,the effects of the calcination temperature and cobalt concentration on the synergistic performance were also investigated and a possible mechanism for the synergistic system was proposed.This coupled system exhibited excellent catalytic stability and reusability,and almost no dissolution of Co2+ was found.