Abstract
The effect has been considered of the methods of recovering (liquid oxidation of nondiamond carbon with a mixture of sulphuric and chromic acids, selective gas oxidation of nondiamond carbon in the presence of copper salts as a catalyst, and oxidation of nondiamond carbon with a mixture of concentrated sulfuric and nitric acids) diamond nanopowders from detonation-synthesized diamond-carbon products on physicochemical properties of diamond, for which the structural state of the diamond surface is responsible. It has been found that diamond nanopowders recovered using different technologies exhibit a decrease of the volume fraction of aggregates among particles. Nanodiamonds recovered by a catalytic gas-phase oxidation in the presence of copper have been found to be characterized by the highest adsorption activity, thermostability, and electroconductivity due to the carbon-containing cover of a complex composition. The recommendations have been given on the use of diamond nanopowders recovered by different technologies.
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Original Russian Text © G.P. Bogatyreva, M.A. Marinich, G.S. Oleinik, G.A. Bazalii, V.A. Bilochenko, A.N. Panova, 2011, published in Sverkhtverdye Materialy, 2011, Vol. 33, No. 3, pp. 85–95.
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Bogatyreva, G.P., Marinich, M.A., Oleinik, G.S. et al. The effect of the methods of recovering diamond nanopowders on their physicochemical properties. J. Superhard Mater. 33, 208–216 (2011). https://doi.org/10.3103/S1063457611030105
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DOI: https://doi.org/10.3103/S1063457611030105