Investigation of the Pore Structure of Exfoliated Graphite Based on Highly Oriented Pyrolytic Graphite Nitrate

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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.

作者简介

A. Krautsou

Department of Chemistry, Moscow State University

Email: aleksei.kravtsov@chemistry.msu.ru
119991, Moscow, Russia

O. Shornikova

Department of Chemistry, Moscow State University

Email: aleksei.kravtsov@chemistry.msu.ru
119991, Moscow, Russia

A. Bulygina

Department of Chemistry, Moscow State University

Email: aleksei.kravtsov@chemistry.msu.ru
119991, Moscow, Russia

A. Solopov

Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences

Email: aleksei.kravtsov@chemistry.msu.ru
119991, Moscow, Russia

A. Kustov

Department of Chemistry, Moscow State University

Email: aleksei.kravtsov@chemistry.msu.ru
119991, Moscow, Russia

V. Avdeev

Department of Chemistry, Moscow State University

编辑信件的主要联系方式.
Email: aleksei.kravtsov@chemistry.msu.ru
119991, Moscow, Russia

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版权所有 © А.В. Кравцов, О.Н. Шорникова, А.И. Булыгина, А.Б. Солопов, А.Л. Кустов, В.В. Авдеев, 2023