Abstract
Copper nanoparticles have been synthesized from Cu(2+) acetate in the medium of dimethylformamide by the polyol method using hydrazine as a reductant and poly(vinylpyrrolidone) as a stabilizer. Optical spectroscopy has been employed to study the influence of chloride and acetate ions on the oxidation of copper nanoparticles by atmospheric oxygen in aqueous and dimethylformamide media, respectively. It has been established that the presence of ions of one of the aforementioned types in a colloidal solution significantly accelerates the oxidation of metal nanoparticles. In the case of acetate ions, copper oxide particles rapidly dissolve to form the corresponding salt. It has been shown that Cu nanoparticles can be repeatedly formed in such a solution by the addition of hydrazine.
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Original Russian Text © O.V. Dement’eva, V.M. Rudoy, 2012, published in Kolloidnyi Zhurnal, 2012, Vol. 74, No. 6, pp. 702–709.
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Dement’eva, O.V., Rudoy, V.M. Copper nanoparticles synthesized by the polyol method and their oxidation in polar dispersion media. The influence of chloride and acetate ions. Colloid J 74, 668–674 (2012). https://doi.org/10.1134/S1061933X1206004X
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DOI: https://doi.org/10.1134/S1061933X1206004X