Organic pollutants coming from various industry processes are harmful to the environment, and semiconductor heterostructure is a promising candidate catalyst for poisonous wastewater treatment in the future. In this study, CuO x /MnO 2 heterostructures were successfully constructed, using a facile and effective hydrothermal method and chemical both/calcination route, which exhibited higher photocatalytic activity towards the photodegradation of organic contaminants under visible-light driven irradiation. The resulting CuO x /MnO 2 heterostructures were systematically characterized using various microscopic and spectroscopic techniques. Morphological characterizations show that the CuO x nanoparticles are well anchored on the surface of the MnO 2 nanowires (NMs). The photocatalytic activity enhancement of the CuO x /MnO 2 heterostructures (M-4) could be ascribed to the introduction of CuO x on the surface of MnO 2 NWs and the efficient separation of the electron-hole pairs compared to other CuO x /MnO 2 heterostructures and pure MnO 2 NMs. These results show that CuO x /MnO 2 heterostructures can be a suitable candidate for efficient visible light photocatalysts.
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