The effect of thermal modification of turbostratic carbon on its fractal structure

V.I. Mandzyuk; R.P. Lisovskiy; Yu.O. Kulyk; B.I. Rachiy; R.V. Solomovskyi

doi:10.15330/pcss.25.1.51-56

Authors

V.I. Mandzyuk Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine
R.P. Lisovskiy Ivano-Frankivsk National Medical University, Ivano-Frankivsk, Ukraine
Yu.O. Kulyk Ivan Franko National University of Lviv, Lviv, Ukraine
B.I. Rachiy Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine
R.V. Solomovskyi Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine

DOI:

https://doi.org/10.15330/pcss.25.1.51-56

Keywords:

porous carbon material, thermal modification, low-temperature porometry, specific surface area, surface fractal dimension

Abstract

Fractal structure of porous carbon materials (PCMs) obtained by thermal modification under different regimes was investigated using the method of low-temperature porometry. It was established that at modification temperatures of 300 and 600°C, materials with a developed microporous structure are formed, the surface fractal dimension of which is 2.6. At modification temperatures of 400 and 500°C, the value of the fractal dimension of the surface decreases to a value of 2.22, which indicates the formation of an almost smooth surface due to the intensive removal of carbon atoms from the near-surface layers of the material particles, a decrease in the number of micropores with their transition into mesopores, unification of small carbon clusters into larger ones and the formation of microparticles of non-porous carbon material.

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