Scalable and facile preparation of Fe3O4/2D-MoS2 and its application in peroxymonosulfate-based advanced oxidation processes for tetracycline degradation

Abstract

In this paper, a magnetic ferrosoferric oxide/two-dimensional molybdenum disulfide (Fe3O4/2D-MoS2) composite material was successfully prepared by combining liquid phase exfoliation and in-situ liquid phase co-precipitation methods with scalable and facile characteristics and applied to catalyze the degradation of tetracycline (TC) during the peroxymonosulfate-based advanced oxidation processes (PMS-AOPs), which is a typical and widely used antibiotic. The morphology and crystallinity of the composites were determined by scanning electron microscopy, transmission electron microscope and X-ray diffraction, respectively. And its BET surface area was tested by N2 adsorption and desorption curves. For the PMS-AOPs, the effects of iron loading, different systems, initial concentration of pollutants, dosage of the composites, concentration of peroxymonosulfate (PMS) and solution initial pH on the removal of TC were researched in details. The results showed that it could reach 89.0% degradation efficiency within 90 min for 50 mg/L TC with the as-prepared composites as catalyst, showing good catalytic performances. In addition, the mechanisms of the reaction were deduced by quenching experiments and X-ray photoelectron spectroscopy analysis. It was turned out that the as-synthsized material has a broad applying prospect in PMS-AOPs.