A high recombination rate and low charge collection are the main limiting factors of copper oxides (cupric and cuprous oxide) for the photocatalytic degradation of organic pollutants. In this paper, a high performance copper oxide photocatalyst was developed by integrating cupric oxide (CuO) and cuprous oxide (Cu₂O) thin films, which showed superior performance for the photocatalytic degradation of methylene blue (MB) compared to the control CuO and Cu₂O photocatalyst. Our results show that a heterojunction photocatalyst of CuO-Cu₂O thin films could significantly increase the charge collection, reduce the recombination rate, and improve the photocatalytic activity.
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Khiavi et al. (2019) studied this question.
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