2014-Sustainable Industrial Processing Summit
SIPS 2014 Volume 6: Rare Earths & Ionic Liquids
| Editors: | Kongoli F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2014 |
| Pages: | 432 pages |
| ISBN: | 978-1-987820-08-9 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Electrochemical synthesis of nanoscale powders of carbon-containing compounds (doped, undoped carbon tubes and fibers, tungsten carbides) in molten salts
Inessa Novoselova1; Sergey Volkov1;1INSTITUTE OF GENERAL AND INORGANIC CHEMISTRY, Kiev, Ukraine;
Type of Paper: Regular
Id Paper: 61
Topic: 11
Abstract:
Electrochemical synthesis in molten salts has great possibilities for production of various carbon containing compounds (doped, undoped carbon tubes and fibers, tungsten carbides) in one step in the form of coatings and ultra fine powders. Theory and experimental certification of this method for the synthesis of different refractory metal compounds (borides, carbides, silicides of IV-VI groups of metals) were developed in the 1980s at the Institute of General and Inorganic Chemistry of the Ukrainian National Academy of Sciences.The goal of the present paper is the creation of physical-chemical basis for electrochemical synthesis of nanoscale powders of undoped and doped carbon nanotubes and fibers, powders of tungsten and molybdenum carbides in various morphological forms (tubes, fibers and rods). The peculiarities of partial and joint electrochemical reduction of carbon in solid state from CO2 and CO32- anion and tungsten from different ionic forms were studied by cyclic voltammetry. The mechanisms of electrode processes were suggested. Conditions (composition of electrolytic bath, temperature, cathodic current density, bath potential) of electrochemical synthesis of nanoscale carbon materials were determined. Properties of produced carbon-containing compounds were analyzed by XRD, SEM, TEM, Raman spectroscopy, BET. Correlation of product properties against synthesis conditions and parameters have been made.