SYNTHESIS AND CHARACTERIZATION OF ZNO/CUS NANOCOMPOSITE FOR PHOTOCATALYTIC WASTEWATER DECONTAMINATION

In this study, ZnO/CuS nanocomposites were successfully synthesized using a microwave-assisted hydrothermal method, demonstrating remarkable potential for photocatalytic wastewater decontamination. A comprehensive characterization of the material confirmed the integration of ZnO and CuS phases, as evidenced by XRD, TEM, SEM, FTIR, and EDX analyses. The band gap energy of the composite was significantly reduced compared to pristine ZnO, resulting in enhanced absorption in the visible light region and improved photocatalytic efficiency. The photocatalytic degradation of methylene blue dye under simulated solar light highlighted the superior performance of the ZnO/CuS nanocomposite. Optimal operating conditions were identified, including a catalyst dosage of 1 g/L, initial dye concentration of 10 ppm, and pH of 9, under which nearly 100% degradation efficiency was achieved. The effects of varying catalyst dosage, dye concentration, and pH on degradation efficiency were systematically studied, providing critical insights into the operational parameters for practical applications. The results underscore the importance of the synergistic interaction between ZnO and CuS in promoting charge separation and reducing electron-hole recombination, thereby enhancing photocatalytic activity. In conclusion, the ZnO/CuS nanocomposite exhibits excellent photocatalytic properties, making it a promising material for environmental remediation.