In the field of environmental science, the ideal Fenton reaction is, by definition, Fe2+ catalyzed H2O2 to produce hydroxyl radicals. However, in reality, most of the reported Fenton reactions are not real catalytic reactions but redox processes. This is mainly because when Fe2+ activates H2O2, it becomes Fe3+. It is difficult for Fe3+ to return to Fe2+, so iron is not a real catalyst. However, the introduction of a cocatalyst can solve this problem. Recently, we have developed a new strategy to promote the efficient iron cycle and the decomposition of H2O2 in Fenton-like reactions through the cocatalytic effect of MoS2. It is found that, i) the highly efficient iron circulation can be realized by the metal reduction center on the surface of inorganic co-catalyst, contributing to the inhibition of iron sludge production; ii) the hydrolysis reaction between iron ion and OH– on Fenton catalyst surface has been well inhibited by controlling the surface microenvironment of catalyst via loading co-catalyst, which leads to the efficient degradation of organic pollutants under neutral and alkaline conditions; iii) the utilization rate of oxidant in co-catalytic Fenton has been significantly improved by the synergistic effect of 1O2 and surface adsorbed ●OH in promoting benzene and heterocycle ring-opening reactions. At present, we are actively promoting the commercialization of three-dimensional cocatalytic Fenton-like technology for the treatment of industrial wastewater.

Cocatalytic fenton reaction for pollutant control

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