Treatment of Nanodiamonds in Supercritical Water Full article
Source | Environanotechnology Monography, Elsevier. 2010. 310 c. ISBN 9780080548203. |
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Output data | Year: 2010, Number: Ch. 8, Pages: 165-176 Pages count : 12 DOI: 10.1016/B978-0-08-054820-3.00008-3 | ||
Tags | supercritical water nanodiamond treatment review | ||
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Abstract:
This chapter focuses on the treatment of nanodiamonds in supercritical water. Among various synthesized carbon nanomaterials, of particular interest are the so-called ultra- dispersed nanodiamonds (UDD) obtained by detonation of solid carbon-containing explosives with a negative oxygen balance. Due to the high adsorption capacities, UDD is considered promising for medical and biological applications. Although this method is highly efficient, the resulting product detonation carbon (soot) or diamond blend contains different structures and forms of carbon, with the diamond phase constituting approximately 35–45 wt%. To recover the diamond phase and remove water-insoluble impurities, the initial diamond blend is usually treated with liquid or gaseous oxidants. The gaseous thermo-oxidants are represented by oxygen or ozone. In practice, the most used technique consists in treating the diamond blend with concentrated nitric acid under thermobaric conditions in an autoclave at elevated pressure and temperature. This method allows one to oxidize nanodiamond carbon and remove metals, their oxides, and some other impurities. The study here shows that the interaction of detonation carbon with SCW is accompanied by the formation of large amounts of gaseous products, mainly CO and CO2, which is evidence of a deep oxidation of the carbon phase. The transformation of nondiamond carbon phase is most pronounced when the detonation carbon is treated in SCW that contains oxygen formed at decomposition of hydrogen peroxide. The SCW treatment of detonation carbon black was shown to increase considerably the weight fraction of diamond phase. It was found that oxidation of the diamond nucleus does not occur when detonation carbon is treated in SCW.
Cite:
Anikeev V.I.
, Ermakova A.I.
Treatment of Nanodiamonds in Supercritical Water
Monography chapter Environanotechnology. – Elsevier., 2010. – C.165-176. – ISBN 9780080548203. DOI: 10.1016/B978-0-08-054820-3.00008-3 WOS Scopus РИНЦ
Treatment of Nanodiamonds in Supercritical Water
Monography chapter Environanotechnology. – Elsevier., 2010. – C.165-176. – ISBN 9780080548203. DOI: 10.1016/B978-0-08-054820-3.00008-3 WOS Scopus РИНЦ
Dates:
Published print: | Jan 1, 2010 |
Published online: | May 14, 2010 |
Identifiers:
Web of science | WOS:000319048600009 |
Scopus | 2-s2.0-84882416433 |
Elibrary | 20536860 |
Chemical Abstracts | 2010:1392065 |
Chemical Abstracts (print) | 156:540221 |
OpenAlex | W2503575965 |
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