Magnetically recyclable 1 T-2 H MoS2/Fe3O4 hybrids with photothermal-promoted photo-Fenton catalytic performance

Abstract

The transition metal sulfide MoS2 has attracted great interest from the scientific community as an excellent co-catalyst for promoting Fe2+/Fe3+ cycling in advanced oxidation processes to enhance the efficiency of H2O2 decomposition. A photothermal-enhanced photo-Fenton pollutant degradation strategy was proposed. Hybrids of magnetically recyclable Fe3O4 fabricated 1 T-2 H MoS2 (1 T-2 H MoS2 @Fe3O4) with excellent photothermal conversion efficiency were fabricated to overcome the limitations of relatively low catalytic activity and cycling stability in Fenton reaction. XRD, Raman, TEM and hysteresis loop were employed to evaluate the heterogeneous phase 1 T-2 H MoS2 nanoflowers as well as the magnetic property. The 1 T-2 H MoS2 @Fe3O4 hybrids with excellent photothermal conversion efficiency not only enhance the reaction temperature of the Fenton reaction occurring on the material surface, but also demonstrate an effective interfacial photothermal water evaporation efficiency. Due to the synergistic effect of photocatalysis and photo-Fenton catalytic reaction, a quick degradation of simulated pollution were achieved in 5 mins with 98.3% degradation, which could be further improved to 99% due to the photothermal promoting reaction. The 1 T-2 H MoS2 @Fe3O4 hybrids exhibit good magnetic recyclability, cyclic stability and photothermal performance, which endow it a wide potential application in the field of environmental remediation and the field of water evaporation at the photothermal interface, etc.