Synthesis of nanofi brous hybrid composite from carbamide treated oxidized carbon obtained via К2СО3 activation of carbonized lignocellulose
DOI:
https://doi.org/10.18321/cpc21(4)273-285Keywords:
carbon nanofiber, pyrolysis, carbamide, functionalization, N-rich activated carbonAbstract
In this study, bamboo-like carbon nanofiber (CNF) supported with powdered N-functionalized active carbon (AC) were obtained using conventional methods, e.g.: carbonization of rice husk in a rotary steel reactor followed by potassium carbonate activation, water washing, nitric acid oxidation, carbamide impregnation and finally annealing in Ar flow at 950 ºС in quartz tube reactor. Along the course of retracting the tube from the furnace, resublimation of carbamide pyrolysis products took place leading to the AC/CNF composite formation. Physicochemical properties of the achieved material were investigated by different methods, inclusive of low-temperature nitrogen adsorption, XPS, SEM/EDS, as well as TEM. The nitrogen adsorption results showed that micro-mesoporous material with high surface area and large pore volume was obtained, the results for XPS and EDS revealed that obtained composite contains appreciable amount of covalently bound nitrogen in AC part (up to1.4 %), while on SEM and TEM images, bamboo-like CNF within size range of 90-3000 nm are clearly seen, some of them tipped with iron carbide microparticles. Our results proposed a facile one-pot synthesis of N-rich AC/nanofibrous hybrid composite from oxidized AC and carbamide, with potential applications, such as electrode material for electrochemical applications, advanced carbon adsorbents and catalysts for various processes.
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Copyright (c) 2023 Ж.М. Жандосов, А.Ж. Байменов, С. Азат, Ш. Султахан, Р.Г. Абдулкаримова, Б.Т. Лесбаев, Е.О. Досжанов, З.А. Мансуров
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