Enhanced catalytic activity of Co/Fe co-doped MoS₂ catalyst as the peroxymonosulfate activator for organic pollutants degradation

Based on the strong capability of transition metal ions for peroxymonosulfate (PMS) activation and highly affinity of MoS2 towards PMS, thus decorating MoS2 with transition metal ions would efficiently activate PMS for degradation of organic pollutants. In this work, Co/Fe co-doped MoS2 catalyst were synthesized by simple chemical method. The prepared Co/Fe co-doped MoS2 catalyst displayed excellent catalytic activity for organic pollutant degradation. The removal efficiency of RhB and MB is 99% in 6 min and 98% in 15 min under PMS system, respectively. Both the capture experiment and EPR results verified that O-1(2) played an important role in the organic pollutant degradation process in PMS system. The catalytic mechanism revealed that the synergistic effect between Mo ion and Co/Fe ions is beneficial for boosting the catalytic properties of Co/Fe co-doped MoS2 catalyst. The cycle experiments confirmed that Co/Fe co-doped MoS2 possesses excellent chemical stability and re-usability.