Highly efficient co-catalytic activation of peroxomonosulfate by hybrid-phase 1T/2H-MoS2 nanoflowers combined with Fe2+ in the fenton-like process

Abstract

Activation of peroxymonosulfate (PMS) by Fe2+ is widely used for oxidizing organic pollutants, but the slow cycling of Fe3+/Fe2+ has been considered as the bottleneck limiting the Fenton-like technology. Herein, the hybrid-phase 1T/2H-MoS2 nanoflowers have been applied to co-activate PMS with Fe2+ in the Fenton-like process. Benefiting from the increase of layer spacing, specific surface area, surface unsaturated S, and Fe3+/Fe2+ cycling, 1T/2H-MoS2 assisted Fe2+/PMS system exhibited a remarkable catalytic activity over a wide pH range and high stability towards Rhodamine (RhB) degradation. The rapid removal of RhB mainly contributed to the 1O2-dominated non-radical mechanism and the strong adsorption by 1T/2H-MoS2 surface.