Abstract
In this study, a novel iron-based composite was prepared by a simple solvothermal method on MIL-88B(Fe) precursor and applied to persulfate (PS) activator and photocatalysts to synergistic remove ibuprofen (IBP) from water. The characterization results showed that ReS2 nanoparticles were successfully anchored in MIL-88B(Fe) to form ReS2/MIL-88B(Fe) (ReSFe) heterojunctions. The loading of ReS2 led to the regular crack-like depressions appeared on the surface of hexagonal prism MIL-88B(Fe). With the visible light irradiation and PS, 2% content ReS2 of ReSFe (ReSFe-0.2) exhibited a best catalytic activation capacity for IBP degradation. This was due to ReSFe-0.2 possessed the improved electron transfer ability, higher utilization efficiency of visible light and stronger PS activation ability. Density functional theory (DFT) simulation demonstrated PS activation reaction on ReSFe occurred easier than that of ReS2 and MIL-88B(Fe). ReSFe-0.2 composite showed good stability and reusability in the catalytic process. Additionally, based on the results of experiments and DFT calculation, the reaction mechanism in ReSFe-0.2/PS/light system were proposed. This research provides a fresh approach to the reasonable design of ReSFe composites as photo-assisted Fenton-type catalysts with potential applications in wastewater treatment.
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