ZEHERIYA JATORO AREBO2026-02-042025-03https://etd.hu.edu.et/handle/123456789/602Metal nanoparticles have enhanced much consideration in the field of organic catalysis and catalytic reactions due to the toxicological problems caused by organic dyes to the environment and human health. In the current study, CuO nanoparticle was synthesized through green method using Solanecio gigas leaf extract and, then evaluated for its catalytic degradation activity. The synthesized CuO nanoparticle was confirmed through visual inspection of colour changes and characterized by using UV-Vis, FT-IR, XRD and SEM techniques. From XRD data, the particle sizes of the synthesized CuO nanoparticle were calculated and found to be 38.91nm and appears to be more crystalline in nature. UV-vis analysis of CuO nanoparticles showed continuous absorption in the visible range. Fourier transform infrared spectroscopy (FT-IR) analysis confirmed the presence of several functional groups, particularly hydroxyl, present in the extracts, which may be responsible for capping of nanoparticles. SEM micrographs showed a combination of different shaped and grain size CuO nanoparticle. From the catalytic degradation study, it is possible to conclude that this green route synthesized CuO nanoparticles have high efficiency to degrade Crystal violet. In the degradation of Crystal violet by CuO nanoparticle, maximum degradation efficiency was 90.57% under optimum condition (catalyst dose 0.08 gram, initial concentration 9 ppm, sodium borohydride 0.10 M, reaction time 20 min and pH of 6) The pseudo kinetic study indicates catalytic degradation of Crystal violate in the surface of CuO nanoparticle follows pseudo- zero-order kinetics. The results from this study illustrate that green synthesized CuO nanoparticles offer a cost-effective, environmentally friendly and efficient means for catalytic degradation of dyes.Characterization Crystal violateDegradation efficiencyGreen synthesisNaBH4NanoparticlesPseudo kinetics studyThesis