MoS₂/FeS Nanocomposite Catalyst for Efficient Fenton Reaction

Nanocomposites containing FeS as catalyst and MoS₂ as cocatalyst have been synthesized toward efficient heterogeneous Fenton reaction. The deposition of FeS nanoparticles in situ on the surface of MoS₂ nanosheets creates strong contact between the two components and generates a large number of exposed Mo⁶⁺ sites and sulfur vacancies, which contribute to the enhanced degradation rate by accelerating Fe³⁺/Fe²⁺ cycling and ensuring rapid electron transfer. In addition, the MoS₂/FeS nanocomposite catalysts exhibit the best performance at near-neutral conditions (pH 6.5), which solves the challenges in conventional Fenton reactions such as leaching of metal ions, the formation of iron slurry, and the need of adjusting solution pH. Further, the nanocomposite can maintain high efficiency after many recycling experiments. It is believed that the MoS₂/FeS nanocomposite represents an efficient heterogeneous Fenton catalyst that can greatly promote the performance of advanced oxidation processes (AOPs) for solving practical environmental issues.