Carbon nanoparticles based on thermally expanded graphite: effect of the TEG obtaining route on the particles morphology
E.V. Raksha1, V.A. Glazunova2, O.N. Oskolkova1, P.V. Sukhov1, G.K. Volkova2, A.A. Davydova1, Yu.V. Berestneva3, M.V. Savoskin1
1 L.M. Litvinenko Institute of Physical Organic and Coal Chemistry
2 Donetsk Institute for Physics and Engineering named after A.A. Galkin
3 Complex Melioration and Protective Afforestation of the Russian Academy of Sciences
Abstract: The paper presents the investigation results of the morphology of carbon nanoparticles formed during liquid-phase exfoliation of thermally expanded graphite in tert-butanol. The thermally expanded graphite used in this work was obtained by thermal expansion of graphite nitrate with acetic and formic acids in the thermal shock mode at 500 °C and 900 °C. Initial cointercalate was shown by powder X-ray diffraction analysis to be the mixture of the IInd and the IVth stage intercalation compounds. It has been established by transmission electron microscopy that dispersions of carbon nanoparticles formed during the exfoliation of thermally expanded graphite in tert-butanol via sonication contain mainly few-layer graphenes, the planar dimensions of which reach 8 μm. The influence of the conditions for thermally expanded graphite obtaining on the morphology of resulting carbon nanoparticles is discussed. Dispersions based on thermally expanded graphite obtained at a lower temperature, in addition to few-layer graphenes, also contain a significant amount of amorphous carbon particles with planar sizes up to 100 nm.
Keywords: few-layer graphenes, liquid-phase exfoliation, graphite nitrate, cointercalation
- Elena V. Raksha – Ph. D., Senior Researcher, Supramolecular Chemistry Department, L.M. Litvinenko Institute of Physical Organic and Coal Chemistry
- Valentina A. Glazunova – Researcher, Department of Physics and Engineering of High Pressure and Advanced Technologies, Donetsk Institute for Physics and Engineering named after A.A. Galkin
- Oksana N. Oskolkova – Junior Researcher, Supramolecular Chemistry Department, L.M. Litvinenko Institute of Physical Organic and Coal Chemistry
- Petr V. Sukhov – Junior Researcher, Supramolecular Chemistry Department, L.M. Litvinenko Institute of Physical Organic and Coal Chemistry
- Galina K. Volkova – Researcher, Department of Physics and Engineering of High Pressure and Advanced Technologies, Donetsk Institute for Physics and Engineering named after A.A. Galkin
- Alina A. Davydova – Junior Researcher, Supramolecular Chemistry Department, L.M. Litvinenko Institute of Physical Organic and Coal Chemistry
- Yulia V. Berestneva – Senior Researcher, Biotechnology Laboratory, Federal Scientific Centre of Agroecology, Complex Melioration and Protective Afforestation of the Russian Academy of Sciences
- Michael V. Savoskin – Ph. D., Director, L.M. Litvinenko Institute of Physical Organic and Coal Chemistry
Raksha, E.V. Carbon nanoparticles based on thermally expanded graphite: effect of the TEG obtaining route on the particles morphology / E.V. Raksha, V.A. Glazunova, O.N. Oskolkova, P.V. Sukhov, G.K. Volkova, A.A. Davydova, Yu.V. Berestneva, M.V. Savoskin // Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials. — 2021. — I. 13. — P. 777-787. DOI: 10.26456/pcascnn/2021.13.777. (In Russian).
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