The method is a safe, environmentally friendly, and rapid method of preparing CuINCs. The electric-discharge-based production process employed in this study is rapid and simple, and the end products have favorable suspension power. Transmission electron microscopy images showed that most of the CuI nanoparticles were smaller than 5 nm and that the nanoparticles were evenly dispersed. X-ray diffraction revealed a complete CuI crystal structure. The resultant CuINC had the highest concentration and suspension stability this indicated that Ton–Toff = 10–10 µs is the most suitable parameter combination for preparing a CuINC. The analysis results indicated that the CuINC prepared under Ton–Toff = 10–10 µs had absorbance of 1.8 and a zeta potential of − 31.9 mV. Copper wires were used as electrodes (copper content = 99.7%, diameter = 1 mm), and deionized water mixed with iodine was used as the dielectric fluid.
In this study, the electric spark discharge method was used to prepare a cuprous iodide nanocolloid (CuINC) specifically, an electrical discharge machine was used to prepare a CuINC under five sets of pulse width modulation (Ton–Toff) parameters, and ultraviolet–visible spectrophotometry and a zetasizer were used to evaluate the most suitable parameter set.
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