Abstract
Ultrasound-assisted transformations of copper-containing compounds in aqueous media were studied. Metallic copper powder, its oxides, copper(II) hydroxide, and a series of distinct soluble and insoluble copper salts were treated by ultrasound in water solutions or suspensions in temperature ranges of 15–20°C and 55–60°C. In some cases, the reactions were carried out in presence of organic solvents, oxidants, and reductants, as well as upon their simultaneous application. Spherical ultrasmall copper(II) oxide particles (2–7 nm in size) were obtained in several systems with quantitative yields; an impurity of CuH is registered in the mixture. Conditions leading to the formation of CuO or metallic copper nanoparticles in ultrasonic conditions were established.
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