Abstract
The non-homogeneous phase photo-Fenton technology exhibits significant promise for water treatment. Nevertheless, the development of photo-Fenton catalysts that are both extremely efficient and being reusable is still impeded. The hydrothermal technique was used to successfully synthesise a novel reusable Z-scheme oligomeric MoS2/Fe/Bi2MoO6 (OM/Fe/BMO) heterojunction in this study. The results indicate a significant enhancement in the photo-Fenton degradation effectiveness of antibiotic using the combination catalyst OM/Fe/BMO under visible light irradiation, achieving a 90.5 % removal rate within 120 min. This represents a 3-fold and 5.4-fold increase compared to OM and OBM, respectively. Moreover, the efficiency of photo-Fenton degradation for OM/Fe/BMO exceeded 85 % after all four cycles. The heterojunction was formed through the tightly connected interface between Fe-doped Bi2MoO6 and MoS2, which reduced the interfacial resistance and facilitated the separation and movement of light-generated charges. The heterojunction also enhances the Fe2+/Fe3+ cycle and promotes the decomposition of hydrogen peroxide, which leads to the generation of hydroxyl radicals that effectively destroy organic pollutants. The mechanism of the OM/Fe/BMO/Vis/H2O2 photo-Fenton degradation process has been elucidated through a series of characterizations and experiments. This study could inspire a water-treatment Z-scheme photo-Fenton catalyst.
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