The CeCoO3/MoS2 heterojunction was successfully prepared through the hydrothermal method. The synthesized heterojunction structure was charac- terized by various techniques and applied to the conversion of methylene blue (MB) under irradiation of visible light. To characterize the new heterojunction structure, Fourier transformed infrared (FT-IR), field emission scanning elec- tron microscope (FE-SEM), energy-dispersive X-ray spectroscopy (EDXS), X- ray diffraction (XRD), photoluminescence spectroscopy (PL), differential reflectance spectroscopy (DRS), and transmission electron microscopy (TEM) analyses were used. The FE-SEM images illustrated the successful deposition of MoS2 flower-like on the surface of CeCoO3 perovskite with 46 nm as an average size. The influence of the amount of catalyst, temperature, pH, and electron acceptor were investigated. By CeCoO3/MoS2 heterostructures photo- catalyst, the conversion rate of MB reached 98% within 20 min, whereas by CeCoO3 perovskite no significant conversion was observed in MB. The higher photocatalytic performance of CeCoO3/MoS2 heterostructures is assigned to their lower charge recombination compared to CeCoO3 perovskite. Moreover, the photocatalytic mechanism and recycling experiments of CeCoO3/MoS2 het- erostructures are discussed in detail. The CeCoO3/MoS2 heterostructures are thus promising photocatalysts for the cleanup of polluted water.
