Iron nanoparticles coated with graphite nanolayers and carbon nanotubes

Synthesis and characterization of poly(divinylbenzene)-coated magnetic iron oxide nanoparticles as precursor for the formation of air-stable carbon-coated iron crystalline nanoparticles

“…These crystalline α-Fe/C nanoparticles exhibit superparamagnetic behavior with a saturation magnetization of 83 emu g −1 (when prepared from γ -Fe 2 O 3 nanoparticles coated with 19% PDVB) and a good stability against oxidation in air up to 200 • C. We can assume that in the annealing process, carbon originating from the PDVB coating reduces γ -Fe 2 O 3 to iron. According to Tokoro et al [68], γ -Fe 2 O 3 is reduced to iron according to the following scheme:…”

Synthesis of carbon-encapsulated iron nanoparticles via solid state reduction of iron oxide nanoparticles

“…Contrary to the previous literature reports [18,19], three distinct carbon materials were used as reductants, i.e. carbon black, hollow carbon nanoparticles and ultra-fine graphite powder.…”

“…Another routes involve two-step processes in which the carbon coatings were deposited onto previously prepared metal nanoparticles with specified diameters [16,17]. The present work is motivated by recent papers demonstrating that carbon-encapsulated iron nanoparticles (CEINs) can be effectively formed by a very simple process-carbothermal reduction (900-1000 1C) of iron oxide nanoparticles by carbon black [18,19]. The both precursors are cheap and environmentally friendly.…”

Magnetic fine particles of Fe and Co encapsulated by carbon layers

“…They were also encapsulated by carbon (C) layers by an arc-discharge method [7,8]. We have successfully fabricated Fe fine particles encapsulated by C layers by means of annealing a mixture of C and iron oxide powders in nitrogen atmosphere [9].…”