A Chemical Co-Reduction Route to Synthesize Nanocrystalline Vanadium Carbide |
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| Authors: | Cun Li Xiaogang Yang Baojun Yang Yitai Qian |
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| Affiliation: | Department of Chemistry, University of Science and Technology of China, Hefei 230026, China |
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| Abstract: | Nanocrystalline vanadium carbide (VC) was synthesized via a chemical co-reduction process, in which VCl4 and CCl4 were used as the vanadium source and the carbon source, respectively, and metallic Na as a reductant in an autoclave at 500°C for 12 h. X-ray powder diffraction indicated that the product was an NaCl type of VC with a cell constant a =4.171 Å. A transmission electron microscopy image showed the VC particles were 10–40 nm in size. X-ray photoelectron spectrum and Raman spectrum showed the surface covered with oxide and graphite. The formation of nanocrystalline VC was discussed based on thermodynamics. |
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