Year: 2025
Type: article
Abstract: Purpose. Comprehensive study of the effect of the activation process on the morphological, structural, and elemental characteristics of technical Carbon in order to create functional carbon-containing materials with specified properties. Methods. Surface morphology and dispersity were investigated by scanning electron microscopy (JEOL 6610LV, secondary electron detector, 20 kV, magnification up to ×100,000). Local elemental composition was determined by energy-dispersive X-ray analysis (Oxford Instruments) with element mapping. Confocal laser microscopy (OmegaScope AIST-NT, resolution up to 300 nm) was used to analyze particle shape, size, and aggregation. Crystallochemical analysis was carried out by the method of rethgenophase analysis of X-ray diffraction (EMMA, CuKα, λ = 1.5406 Å, 2θ range = 10 – 80°). Structural defects and functional groups were identified by the method of Raman scattering spectroscopy (laser λ = 532 nm, spectral resolution 3 cm -1 ). Results. It has been established that the activation process leads to a significant transformation of the technical Carbon structure. There is a decrease in the average particle size from ~3 μm for pyrolytic Carbon to ~2 μm for the activated form, accompanied by a decrease in the polydispersity coefficient from 1.2 to 0.3, which indicates a narrowing of the particle size distribution. The activation process ensures the uniform incorporation of silicon into the Carbon matrix, reaching a concentration of up to 3.2 at. %, resulting in the formation of a homogeneous Carbon-silica nanocompositestructure. At the same time, the Carbon component is structurally ordered, reaching the parameters characteristic of graphite with d 002 = 0.3354 nm. Conclusion. Activation of technical carbon allows for the purposeful formation of ordered Carbon-silica nanocomposites with a developed surface and controlled defectiveness, which are promising for use in sorption processes and catalysis.
Authors: I. V. Loktionova, P. V. Abakumov, L. V. Tarasov, A. E. Kuzko, A. I. Kolpakov
Institution: Kursk State Medical University
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4416979080