2019-Sustainable Industrial Processing Summit
SIPS2019 Volume 13: Composite, Ceramic, Nanomaterials, Polymers, and Mathematics
| Editors: | F. Kongoli, M. de Campos, S. Lewis, S. Miller, S. Thomas |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2019 |
| Pages: | 171 pages |
| ISBN: | 978-1-989820-12-4 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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HIGH TEMPERATURE ELECTROCHEMICAL SYNTHESIS OF CARBON NANOSTRUCTURES
Hasbi Kushkhov1; Marina Ligidova1; Romina Karatsukova1; Zhabagi Ali1; Astemir Hotov1;1KABARDINO-BALKARIAN STATE UNIVERSITY, Nalchik, Russian Federation;
Type of Paper: Regular
Id Paper: 51
Topic: 16
Abstract:
The nanostructured materials on the basis of carbon have a complex of unique properties that allows their application to production of various mechanisms and devices in the modern equipment. One of the perspective methods of synthesis of carbon nanostructures is electrochemical synthesis in ionic melts at high temperatures.
The possibility of synthesis of elementary carbon from the carbonate melts containing lithium carbonate was shown by the first author. In the second work, electrochemical decomposition of carbon dioxide in an equimolar KCl-NaCl melt under an excessive pressure of gas was shown. The electrochemical method of synthesis of carbon nanostructures was developed in 1995 by Hsu with support from coworkers. This method, in comparison with other methods of synthesis of carbon nanostructures, is possible in the condensed phase at rather low temperatures. In this work, scientific bases of electrochemical synthesis of nanostructures, on the basis of carbon in the melted mixes of carbonates of potassium, sodium and lithium, are presented. We studied the electroreduction process of carbonate ions on various electrode materials by methods of cyclic voltammetry and chronopotentiometry. Cathode deposits consisted of C60 and C70 fullerenes, carbon nanotubes, and carbon nanoparticles. They were received by Galvano static electrolysis of carbonate melts, under excess pressure of CO2 up to 12-15 atmospheres in the range of the current density of 0.25÷2.0 A/cm2 at 600-800°C temperature. The SEM methods include: the laser analyzer of the size of the particles, low-temperature adsorption of argon, carried out characterization of morphology, the size, and the specific surface of the synthesized nanostructures on the basis of carbon.
This work is carried out with financial support of the RFFR, project 19-03-00606, and the project of the Ministry of Education and Science of the Russian Federation 4.7481.2017
Keywords:
Carbon; Characterization; Electrolytes; Nanomaterials; Nanoparticles;References:
1. Delimarsky Yu.K., Gorodysky A.V., Gryshchenko V.F. Reports of Academy of Sciences of the USSR, 1964, t.156, No. 3, page 650-651.2. Kushkhov H.B., Shapoval V.I., Novoselova I.A. Elektrokhimiya, 1987, t.23, No. 7, page 952-956.
3. Hsu, W.K., Hare, J.P., Terrones, M., Harris, P.J.F., Kroto, H.W., and Walton, D.R.M., Nature (London) 377, 687 (1995).
Work is carried out with financial support of the RFFR, project 19-03-00606., and project of Ministry of Education and Science of the Russian Federation 4.7481.2017/BP.