Copper(II) oxide nanoparticles have been successfully fabricated in a rapid fashion by a green method which requires nothing more than ultrapure water and copper pallets. In this study, liquid phase plasma system has been deployed to facilitate the synthesis process with tunable parameters of duty cycle (θ), pulse period (τ), copper pallet length, and the distance between electrodes, which essentially contributes to increased particle collision, extended reaction period, enlarged reactant size, and widened space, respectively. X-ray diffraction (XRD) profile shows at 2 theta = 35.6°a nd 38.7°, along with Fourier-transform infrared spectroscopy (FT-IR) characteristic peaks at 435, 528, and 598 cm −1 confirm the presence of highly pure CuO nanoparticles with crystallites about 55-70 nm in length and 15-26 nm in width that develop agglomerated nanoparticles ran ging 155-160 nm in size. Results also reveal that serrated structure electrodes can improve the particle formation rate by 32% from 0.22 to 0.29 g/h.
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