Preparation of iron-containing exfoliated graphite from graphite intercalation compounds with iron chloride treated by liquid ammonia and alkylamines

Muravev, A.D.; Ivanov, A.V.; Mukhanov, V.A.; Pokholok, K.V.; Vasiliev, A.V.; Kazin, P.E.; Stefanidi, K.R.; Maksimova, N.V.; Avdeev, V.V.

Авторы: Muravev Aleksandr D., Ivanov Andrei V., Mukhanov Vladimir A., Pokholok Konstantin V., Vasiliev Alexander V., Kazin Pavel E., Stefanidi Ksenia R., Maksimova Natalia V., Avdeev Victor V.
Журнал: Journal of Physics and Chemistry of Solids
Том: 209
Год издания: 2026
Издательство: Pergamon Press Ltd.
Местоположение издательства: United Kingdom
Первая страница: 113257
Последняя страница: 113257
DOI: 10.1016/j.jpcs.2025.113257
Аннотация: Composites of exfoliated graphite (EG) with metals are promising magnetic sorbents for oil sorption and recovery. This work presents a method for preparation of iron-containing EG from graphite intercalation compound (GIC) with iron chloride and ammonia/amines complexes. GICs with FeCl3 were treated by liquid ammonia, methylamine and ethylamine, followed by rapid heat treatment in a nitrogen atmosphere. Thermal decomposition of ammonia-treated adduct resulted in the formation of metallic α-Fe on the EG surface, while methylamine-treated adduct produced a mixture of α-Fe and iron carbide Fe3C. The structure of both GIC and EG were investigated by XRD analysis and Mössbauer spectroscopy. Ammonia and methylamine react with iron chloride and form the complex compounds within the graphite matrix, whereas ethylamine shows weak reaction with GIC. The presence of alkyl groups in the amines influences both the composition of the iron-containing phase and the EG surface morphology. Iron interacts with carbon to form a γ-(Fe,C) alloy and iron carbide Fe3C and amorphous carbon coats the EG surface leading to increasing hydrophilicity. The resulting EG/Fe composites exhibited high saturation magnetization (up to 50 emu/g) and exceptional hydrocarbon sorption capacity (up to 30 g/g), demonstrating their potential as efficient magnetic sorbents for oil remediation.
Добавил в систему: Муравьев Александр Дмитриевич

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Preparation of iron-containing exfoliated graphite from graphite intercalation compounds with iron chloride treated by liquid ammonia and alkylaminesстатья Исследовательская статья

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