Abstract
A magnetic sorbent based on exfoliated graphite modified with magnesium ferrite has been prepared by impregnating oxidized graphite in a mixed solution of FeCl3 and Mg(NO3)2, followed by heat treatment of the impregnated oxidized graphite in air. X-ray diffraction and Mössbauer spectroscopy results demonstrate that the structure of the magnesium ferrite is an inverse spinel with a degree of inversion of 0.59. The saturation magnetization of the magnesium ferrite-containing exfoliated graphite is 16.1 emu/g, whereas its oil sorption capacity is as high as 54 g/g. Compaction of the exfoliated graphite to a density of 0.03 g/cm3 reduced its sorption capacity to 26 g/g. Further increasing the density of the material led to a considerable decrease in its sorption capacity.
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Original Russian Text © A.V. Ivanov, J.A. Pavlova, N.V. Maksimova, K.V. Pokholok, A.P. Malakho, V.V. Avdeev, 2018, published in Neorganicheskie Materialy, 2018, Vol. 54, No. 7, pp. 668–674.
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Ivanov, A.V., Pavlova, J.A., Maksimova, N.V. et al. Preparation of Exfoliated Graphite Modified with Magnesium Ferrite. Inorg Mater 54, 632–638 (2018). https://doi.org/10.1134/S0020168518070051
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DOI: https://doi.org/10.1134/S0020168518070051