STRUCTURAL, MORPHOLOGICAL AND ADSORPTIVE PROPERTIES OF POROUS CARBON MATERIAL

Abstract

The structural and adsorption characteristics of porous carbon material (PCM) have been investigated in the article
using the methods of low-temperature nitrogen adsorption and scanning electron microscopy. Microporous carbon samples
have been obtained on the basis of bio-containing raw materials of plant origin. Calculations of the total volume and pore size
distribution have made it possible to establish the relationship between these parameters and to draw conclusions about the
possibility of using this carbon material as an electrode component for electric energy storage.
The method of small-angle X-ray scattering has also been used to study the porous structure of the sample. The fractal
dimension of the surface decreases and significant changes are observed in the pore volume distribution of PCM samples with
an increase in the average pore radius of the sample under study. Based on the obtained results of the study, the sample
density is ρ = 0.43 g/cm3
. In addition, an important characteristic of carbon material is porosity, and for the sample CSTR36B, it is equal to w = 0.83.
An integral study of the elemental composition has shown the presence of a large amount of bound oxygen on the
carbon surface and a low percentage of impurities. It is revealed that the carbon material has a highly developed specific
surface, and the main contribution to the total volume is made by pores with a size of 1.232-10 nm.