OBTAINING CARBON NANOMATERIALS FROM SHUBARKOL COAL AND APPLICATION FOR HYDROGEN STORAGE

This study presents a promising method for the synthesis of graphene - the electric arc discharge method. The synthesis of nanomaterials containing graphene was carried out based on carbonized coal "Shubarkol" using the electric arc discharge method at a constant voltage of 75 V and a current of 100 A in a quartz reactor. Based on Raman scattering data and analysis of electrical properties (dielectric constant and electrical resistance), it was shown that the synthesized products have a high degree of graphitization and long-range structural order (2D peak), which indicates the formation of nanomaterials containing graphene. These results present a potential route for low-cost mass production of high-quality graphene samples. In addition, the electrical resistance (R), capacitance (C) and dielectric constant (ε), electrical resistivity (R) and electrical conductivity (χ) of nanomaterials containing graphene were determined for the first time in the temperature range 293-483 K. The highest a degree of graphitization of 80.7% is achieved with the formation of graphene-containing material on the walls of the reactor after an arc discharge. Since the resulting nanomaterial on the reactor walls showed better results in terms of physicochemical and electrophysical properties, the material was tested for hydrogen storage. The sorption capacity of the nanomaterial for hydrogen was 35.1516 cm³/g (0.314%).