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The heterojunction photocatalyst of CuO/ZnO has attracted considerable interest due to its superior ability to degrade organic pollutants through photocatalytic processes. In this research, CuO/ZnO heterojunctions were successfully synthesized by thermal combustion technique. The structural, morphological, and optical characteristics of the resulting materials were extensively analyzed using various characterization methods. Diffraction studies confirmed the presence of both CuO and ZnO phases, with an average crystalline size of 29.625 nm. These findings were corroborated by TEM analysis, which also highlighted the particle size and geometric shape. BET analysis revealed a mesoporous structure with a surface area of 4.18 m²/g. The band gap energy of the catalyst was determined to be 1.48 eV, attributed to the interaction between copper and zinc oxides. The Photoluminescence (PL) indicates the reduction in PL intensity of CuO-ZnO/GA compared to ZnO/GA ascribed to the reduction in electron–hole Coulombic attraction. The photocatalytic efficiency of the CuO/ZnO heterojunction was assessed by its degradation of methylene blue (MB) dye, achieving 97% removal. This enhanced in catalytic efficiency was attributed to the effective separation of electron-hole pairs and the extended absorption range into the visible light spectrum.
Atheel Alwash (Thu,) studied this question.