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Alaa R. Amrin. Photocatlytic oxidation of congo red dye by using Co2O3–Cr2O3 as a Photocatalyst. mesop. environ. j [Internet]. 2022 Mar. 5 [cited 2024 Nov. 24];2(2):66-74. Available from: https://mej.uobabylon.edu.iq/index.php/mej/article/view/123