Supercritical fluid synthesis and possible properties of “cubic graphite”
https://doi.org/10.17586/2220-8054-2020-11-4-408-416
Abstract
We report on supercritical fluid synthesis of an intermediate carbon phase – austite – at a pressure of 180 MPa and temperatures 500–700◦C from soot as a precursor and supercritical carbon dioxide as a solvent. According to the results of electron and X-ray diffractions, spectral measurements and density-functional theory calculations, the observed carbon phase is proved to be cubic with a lattice parameter value of 8.96±0.05 A and a˚ possible structural type as for KFI zeolite.
Keywords
Supporting agencies: We acknowledge M. Czank and W. Depmeier for their assistance with Electron diffraction method according to DFG visiting grant. A.E. acknowledges a support from ISSC UB RAS (theme AAAAA19-119031890025-9). Visualizations of atomic structures and MD trajectories were performed using VMD software (www.ks.uiuc.edu/Research/vmd/) [39].
About the Authors
A. V. Pokropivny
Frantsevich Institute for Problems of Materials Science NASU; G. V. Kurdyumov Institute for Metal Physics, NASU
Ukraine
Ukraine
Kyiv
A. N. Enyashin
Institute of Solid State Chemistry UB RAS
Russian Federation
Russian Federation
Ekaterinburg
A. S. Smolyar
Frantsevich Institute for Problems of Materials Science NASU; M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation NASU
Ukraine
Ukraine
Kyiv
V. A. Kuts
Institute of Magnetism NASU
Ukraine
Ukraine
Kyiv
V. G. Gurin
Institute of Magnetism NASU
Russian Federation
Russian Federation
Kyiv
S. A. Antipov
Institute of Magnetism NASU
Ukraine
Ukraine
Kyiv
P. M. Silenko
Frantsevich Institute for Problems of Materials Science NASU
Ukraine
Ukraine
Kyiv
Yu. M. Solonin
Frantsevich Institute for Problems of Materials Science NASU
Ukraine
Ukraine
Kyiv
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Review
For citations:
Pokropivny A.V., Enyashin A.N., Smolyar A.S., Kuts V.A., Gurin V.G., Antipov S.A., Silenko P.M., Solonin Yu.M. Supercritical fluid synthesis and possible properties of “cubic graphite”. Nanosystems: Physics, Chemistry, Mathematics. 2020;11(4):408–416. https://doi.org/10.17586/2220-8054-2020-11-4-408-416
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