Interaction of FeCl3-intercalated graphite with intercalants of different strengthsстатья
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Дата последнего поиска статьи во внешних источниках: 6 февраля 2014 г.
Аннотация:This paper examines reactions of stage I and II FeCl3graphite intercalation compounds (GICs)
with intercalants of different strengths: nitric acid and tetrahydrofuran (THF). The reaction of GIC–FeCl3 with nitric acid, a strong intercalant, leads to HNO3 substitution for the FeCl3 in the interlayer spaces of the graphite and formation of a stage II GICs with HNO3. THF, a weak intercalant, does not form any compounds with a stage I or II GIC with FeCl3; instead, it diffuses to intercrystalline regions of the graphite host. Flash heating of the synthesized GICs in air leads to the formation of exfoliated graphite (EG) containing á-Fe2O3 particles, which has low bulk density, down to 6.5 g/L, and high ferric oxide content, up to 33 wt %.
Reduction in flowing hydrogen at 600°C leads to the formation of EG with up to 23 wt % áFe particles supported on it and with a saturation magnetization of 50 emu/g.