Fe2SiS4 nanoparticle-A new heterogeneous Fenton reagent

The heterogeneous Fenton system has become the hotspot in the decontamination field due to the effective Fenton activity with a wide pH range compared with the homogeneous Fenton system. The unstable chemical properties of pyrite leaded to the flourishing investigation of the candidates for the heterogeneous Fenton catalysts. In this article, Fe2SiS4 nanoparticles with better thermodynamic stability were prepared, and its potential as Fenton reagent was investigated. It was found that the polar surface consisted by the unsaturated iron atoms in the Fe2SiS4 crystalline configuration resulting in the realization of Fenton reaction. Meanwhile, sunlight irradiation could promote the reduction of ferric ions and further enhance the Fenton effect.