Construction of a novel ferrihydrite/MoS2 heterogeneous Fenton-like catalyst for efficient degradation of organic pollutants under neutral conditions

In this work, we have fabricated a novel Fenton-like ferrihydrite/MoS 2 (Fh/MoS 2 ) composite and verified that the introduction of a small amount of iron on the surface of MoS 2 can directly promote the exposure of Mo 4+ , finally enhancing the catalytic activity of the catalyst. Even though the content of iron element is only 1.19% in the composite, the reaction rate constant of Fh/MoS 2 system for the degradation of environmental pollutants, such as organic dyes, antibiotic, and ionic liquid, is all much better than that of pure MoS 2 system, which is attributed to much more generation of reactive oxygen species derived from synergistic effect of Fe 3+ /Fe 2+ and Mo 4+ /Mo 6+ redox cycles. The results of XPS and low-temperature EPR confirm that the exposure amount of Mo 4+ active sites of 10% Fh/MoS 2 is greatly increased, which is conducive to the conversion of Fe 3+ to Fe 2+ in the reaction process, thus effectively promoting the activation of H 2 O 2 .