Flower-like FeMoO₄@1T-MoS₂ micro-sphere for effectively cleaning binary dyes via photo-Fenton oxidation

Right here, flower-like FeMoO₄@1T-MoS₂ composites were prepared by modifying FeMoO₄ microspheres with two-dimensional lamellar 1T-MoS₂ as co-catalyst, which was used for photo-Fenton catalysis degradation of binary dyes mixed with methylene blue (MB) and rhodamine B (RhB). Then various parameters affecting the generation of ·OH in the system were investigated. Systematic research shows that the degradation efficiency of MB and RhB can reach 99.8% in 18 min when the Mo/Fe molar ratio of the composite is 1:1. Furthermore, these experiments data were fitted by pseudo-first order kinetics model and pseudo-second order kinetics model. Subsequently the density functional theory (DFT) simulation results showed that FeMoO₄ exhibited excellent adsorption for H₂O₂, and the introduction of 1T-MoS₂ played a certain role in the adsorption and activation of H₂O₂. Finally, the degradation pathways of MB and RhB were proposed to determine intermediates during photo-Fenton process by LC-MS and the reaction mechanism was detailed investigated by quenching experiment of active free radicals. FeMoO₄@1T-MoS₂ has also excellent stability and highlights the potential and prospect of the composite for dye wastewater treatment.