Title : Green synthesis, characterization and the antibacterial activity study of copper nanoparticles from pomelo (citrus maxima) peels
Abstract:
This study illustrates the manufacture of copper nanoparticles utilizing pomelo peels extract (Citrus maxima) as a natural reducing and stabilizing agent. We used UV-visible spectroscopy, Fourier-transform infrared (FTIR) analysis, and Zetasizer nano series to learn more about the nanoparticles made. The analysis utilizing UV-visible spectroscopy was conducted within the wavelength range of 200 to 700 nm for the copper nanoparticles. The absorption spectrum of Cu NPs nanoparticles was analyzed. The spectrum of the generated 39.59 nm Cu nanoparticles reveals a peak at 240.01 nm, 1.63 A, linked to plasmon surface vibrations. The FTIR analysis substantiated the reduction and stabilization of Cu nanoparticles, revealing peaks at 3304 cm?¹, 1719 cm?¹, 1149 cm?¹, and 678 cm?¹, corresponding to -OH, C=O, C-O, and C-H, respectively. This confirms the functional groups implicated in the synthesis and capping process. Concurrently, the Zetasizer Nano series elucidates three essential parameters: particle size, zeta potential, and molecular weight. The average size of the produced nanoparticles was determined to be 39.59 nm for Cu nanoparticles. The results indicate the necessity for additional investigations to explore the synthesis of a diverse array of nanoparticles utilizing various plant extracts through environmentally friendly synthesis methods. Excellent antibacterial efficacy against gram-positive Staphylococcus aureus and gram-negative Escherichia coli was demonstrated by the produced copper nanoparticles. Gram-negative bacteria had zones of inhibition of 16 mm at 10 mg/mL and 19 mm at 20 mg/mL, whereas gram-positive bacteria had zones of inhibition of 19 mm at 10 mg/mL and 23 mm at 20 mg/mL, respectively. The research demonstrated that pomelo peels extract can be utilized to synthesize copper nanoparticles exhibiting potent antibacterial characteristics in an eco-friendly, sustainable, and effective manner. The study's findings support environmentally benign and sustainable nanotechnology with a wide range of biomedical uses.
