STUDY OF THE STRUCTURE AND STRUCTURAL TRANSFORMATIONS IN GLASSY CARBON USING IR-FOURIER SPECTROSCOPY (FTIR)

We present the results of studying the structure and structural transformations in the surface layer of glassy carbon (GC) samples after thermal treatment in a temperature range of 1500 – 3000°Cin an inert atmosphere. Heat treatment leads to structural transformations that change the ratio of hybridization of carbon atoms, impurity content, and porosity. IR-Fourier spectroscopy study of the samples using IR-Infinity SHIMADZU with a standard diffuse reflection attachment revealed sp-, sp²-, and sp³-hybridized carbon atoms present in GC samples, and adsorbed hydroxyl, carbonyl groups and hydrogen atoms in aromatic and aliphatic carbon structures. Change in the content of those structures with an increase in the temperature of heat treatment of the samples is analyzed. Electron microscopy carried out on the JEOL JSM-6490LV device revealed the presence of microporosity, layered structural fragments that differ from the GC structure inside the pores. The obtained results compared with the results of X-ray diffraction analysis of the samples match the available data regarding the structure and structural transformations in GC.

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