- PII
- 10.31857/S0044453723060122-1
- DOI
- 10.31857/S0044453723060122
- Publication type
- Status
- Published
- Authors
- Volume/ Edition
- Volume 97 / Issue number 6
- Pages
- 827-835
- 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
- терморасширенный графит окисленный графит высокоориентированный пиролитический графит пористая структура NLDFT MDFT
- Date of publication
- 12.09.2025
- Year of publication
- 2025
- Number of purchasers
- 0
- Views
- 9
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