Enhanced photocatalytic conversion of organic dyes using CeFe𝐎𝟑/𝐌𝐨𝐒𝟐heterojunction as a highly effective visiblelight-driven photocatalyst

The CeFeO۳/MoS۲ heterojunction was successfully prepared through the hydrothermalmethod. The synthesized heterojunction structure was characterized by various techniques andapplied to the conversion of methylene blue (MB) under irradiation of visible light. To characterizethe new heterojunction structure, Fourier transformed infrared (FT-IR), field emission scanningelectron microscope (FE-SEM), energy-dispersive X-ray spectroscopy (EDXS), Xray diffraction(XRD), photoluminescence spectroscopy (PL), differential reflectance spectroscopy (DRS), andtransmission electron microscopy (TEM) analyses were used. The FE-SEM images illustrated thesuccessful deposition of MoS۲ flower-like on the surface of CeFeO۳ perovskite with ۴۶ nm as anaverage size. The influence of the amount of catalyst, temperature, pH, and electron acceptor wereinvestigated. By CeFeO۳/MoS۲ heterostructures photocatalyst, the conversion rate of MB reached۹۸% within ۲۰ min, whereas by CeFeO۳ perovskite no significant conversion was observed inMB. The higher photocatalytic performance of CeFeO۳/MoS۲ heterostructures is assigned to theirlower charge recombination compared to CeFeO۳ perovskite. Moreover, the photocatalyticmechanism and recycling experiments of CeFeO۳/MoS۲heterostructures are discussed in detail.The CeFeO۳/MoS۲heterostructures are thus promising photocatalysts for the cleanup of pollutedwater.

کلیدواژه ها:

conversion of dyes ، heterojunction ، perovskite ، photocatalyst