Abstract
In this study, we have incorporated different ratios of copper oxide (CuO) into cadmium sulphide (CdS) to fabricate CdS/CuO binary composites that are utilized as an efficient photocatalyst for rhodamine 6G (R6G) dye decomposition under ultraviolet (UV) exposure. CdS and CuO formed by precipitation and annealing were combined to form composites using a wet physical mixing method. X-ray diffraction (XRD) analysis reveals the preservation of their respective crystalline phases in the composite. Scanning electron microscopy (SEM) images imply that the interface between CuO and CdS improves with increasing CuO content. The coexistence of CuO and CdS compounds could also be verified by Fourier-transform infrared spectroscopy (FTIR) analysis. Also, the UV–Vis absorbance spectra demonstrate a significant increase in absorption intensity accompanied by a bandgap narrowing, which is beneficial for photocatalytic activity. The photocatalytic degradation rate and efficiency are significantly enhanced with CuO loading, with the highest constant rate obtained being as 4.69 × 10-3 min−1. Conclusively, the present CdS/CuO composite can serve as a vital catalyst for environmental sustainability, especially in wastewater remediation.
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