Investigation of the Pore Structure of Exfoliated Graphite Based on Highly Oriented Pyrolytic Graphite Nitrate
- Authors: Krautsou A.V.1, Shornikova O.N.1, Bulygina A.I.1, Solopov A.B.2, Kustov A.L.1, Avdeev V.V.1
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Affiliations:
- Department of Chemistry, Moscow State University
- Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences
- Issue: Vol 97, No 6 (2023)
- Pages: 827-835
- Section: СТРОЕНИЕ ВЕЩЕСТВА И КВАНТОВАЯ ХИМИЯ
- URL: https://journals.rcsi.science/0044-4537/article/view/136622
- DOI: https://doi.org/10.31857/S0044453723060122
- EDN: https://elibrary.ru/JIJQQW
- ID: 136622
Cite item
Abstract
Graphite intercalated compounds (GICs) with different stage numbers were prepared from highly oriented pyrolytic graphite (HOPG) and nitric acid using a chemical method. Exfoliated graphite (EG-T) was synthesized from GICs by water treatment followed by thermal shock. The effects of the graphite oxidation depth on the EG-T thermal expansion coefficient, volatile content, and total porosity were examined. However, the main purpose of this work was investigation of the dependence of the inner EG-T pore structure on the level of oxidation. Thus, we studied the micro- and mesopore structure and specific surface area by nitrogen porosimetry and the modern 2D-NLDFT method to calculate the pore size distribution and pore volume. As well, we performed a mercury porosimetry experiment to determine the macropore characteristics. We examined the pore space using a number of scanning electron micrographs of EG-T particle cross-sections using an image processing technique. In this way we showed the strong correlation between the EG-T pore structure parameters and oxidation depth of graphite.
Keywords
About the authors
A. V. Krautsou
Department of Chemistry, Moscow State University
Email: aleksei.kravtsov@chemistry.msu.ru
119991, Moscow, Russia
O. N. Shornikova
Department of Chemistry, Moscow State University
Email: aleksei.kravtsov@chemistry.msu.ru
119991, Moscow, Russia
A. I. Bulygina
Department of Chemistry, Moscow State University
Email: aleksei.kravtsov@chemistry.msu.ru
119991, Moscow, Russia
A. B. Solopov
Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences
Email: aleksei.kravtsov@chemistry.msu.ru
119991, Moscow, Russia
A. L. Kustov
Department of Chemistry, Moscow State University
Email: aleksei.kravtsov@chemistry.msu.ru
119991, Moscow, Russia
V. V. Avdeev
Department of Chemistry, Moscow State University
Author for correspondence.
Email: aleksei.kravtsov@chemistry.msu.ru
119991, Moscow, Russia
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