Photocatalytic performance of Ag/CuBi2O4/TiO2 heterostructures

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In this study, CuBi2O4 materials were synthesized using a solid-state reaction method. CuBi2O4 and TiO2 materials were mixed in different proportions. After verifying that CuBi2O4 and TiO2 are in a 1:5 ratio, optimal photodegradation of methylene blue under UV light irradiation is achieved. Under the existing heterostructure nanocatalyst of CuBi2O4 and TiO2, when a little noble metal or rare earth element is doped, a little Ag is added to understand the changes in photocatalysis and its characteristics. The Ag-doped TiO2 powder was ground with the optimal quantitative ratio of CuBi2O4 powder to form Ag/TiO2/CuBi2O4 heterostructure catalysts for photocatalytic degradation evaluation. Photocatalytic behavior in methylene blue degradation under UV-light irradiation demonstrates that the Ag/TiO2/CuBi2O4 heterostructure nanocatalyst, doped with 11 wt.% Ag, achieves superior photocatalytic activity. The degradation efficiency reaches 82.65% after 2 hours, which is a significant improvement of 34.28% over the original CuBi2O4/TiO2’s 48.37%. Finally, the photocatalytic mechanism of CuBi2O4/TiO2 in Ag-doped heterostructure nanocatalysts was discussed.