Correlations between the Characteristics of the Initial and Final Materials of Copper Nanopowder

Using the example of copper oxide nanopowders, the correlation between the morphology and particle size of the initial and final materials is investigated by means of X-ray fluorescence, X-ray phase analysis, electron microscopy, and thermogravimetric analysis. From 10% salt solutions, an oxygen-containing copper sediment which was a mixture of copper hydroxonitrate Cu2(OH)3NO3 and copper oxide CuO was synthesized, from which powders with various morphologies were formed by various types of treatment. The reactions occurring during thermal decomposition of the obtained sediment were established, as well as the scheme of reducing Cu2(OH)3NO3 to metal copper. The phase composition, morphology, and particle size of the deposited material and metal product were studied. A scheme of formation of metal copper nanoparticles from copper hydroxonitrate is proposed.