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O. N. Shornikova, N. Ye. Sorokina, N. V. Maksimova, V. V. Avdeev

Thermal Properties of the graphite intercalation compounds, synthesized in the graphite–H2SO4–R system (R = H2O, C2H5OH, C2H5COOH)

Abstract

The systematic investigation of the thermal properties of graphite intercalation compounds (GIC), synthesized in the electrolyte made of H2SO4 – R solutions (R = H2O, C2H5OH, C2H5COOH), was carried out for the first time. The composition of the gaseous phase involved during decomposition of the GIC was analyzed by IR – spectroscopy and mass – spectrometry. It is shown that GICs synthesized in the combined electrolyte are less stable than those obtained in 94% H2SO4 independently of the solvent nature. It is established the deintercalation of the acids from graphite matrix starts at 150–170oC. Further thermal treatment of the GICs results absolute deintercalation of the acids and the final product is graphite (d00l = 3.36 E). The enthalpies of decomposition were determined, they are equal to 5–22 kJ/molC and do not surpass Van-der-Vaals interactions.
Moscow University Chemistry Bulletin.
2006, Vol. 47, No. 5, P. 327
   

Copyright (C) Chemistry Dept., Moscow State University, 2002
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