Green and rapid fabrication of copper oxide in enhanced electrode liquid phase plasma system

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° and 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 ranging 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. A green and rapid fabrication of highly pure copper oxide nanoparticles is being carried out by a liquid phase plasma system. With modified electrode structure, the production of copper oxide nanoparticles can be greatly enhanced without endangering the environment.