Synthesis of carbon–Fe3O4 coaxial nanofibres by pyrolysis of ferrocene in supercritical carbon dioxide

Designed synthesis of wide range microwave absorption Fe3O4–carbon sphere composite

“…2b. In low wave number region, there are peaks at 207, 286, 390 cm −1 , which are in accordance with that of Fe 3 O 4 [14]. In high wave number region, there are two peaks, one at 1372 cm −1 and the other at 1604 cm −1 .…”

Synthesis and magnetic properties of iron oxide nanoparticles/C and α-Fe/iron oxide nanoparticles/C composites

“…Over the last decade, metal or metal carbide nanoparticles/C composites have been investigated by many groups, but few reports have involved the magnetic transition metal oxide nanoparticles/C composites [5,[15][16][17]. In recent years, ferrocene ((Z 5 -C 5 H 5 ) 2 Fe) has been widely used as a raw material to prepare various magnetic iron oxide nanostructures in the presence of oxidizing agent [15,18,19].…”

“…In these composites, the role of the carbon matrix is mainly to protect the magnetic nanoparticles against environmental degradation effects and isolate these blocks from each other to weaken and/or avoid the magnetic interaction. Up to now, a number of techniques, including standard and modified carbon arc techniques [7,8], magnetron and ion-beam co-sputtering [9,10], chemical vapor deposition (CVD) [11], catalytic carbonization process [12] and pyrolysis of organometallic compound [13][14][15] have been employed to obtain various magnetic nanoparticles/C composites.…”

Magnetite nanorod thermotropic liquid crystal colloids: Synthesis, optics and theory

“…Recent advances in the synthesis of elongated magnetite (Fe 3 O 4 ) nanostructures suggest that this material may be promising for magneto-optic application [11]. Several different preparation methods for elongated magnetite (Fe 3 O 4 ) nanorods have been reported, including template-assisted hydrolysis (using PEG [13,14], PVP [15], or ethylenediamine [16]), templateless hydrolysis [17], hydrolysis of dissolved iron salts or b-FeOOH nanorods [18] under hydrothermal conditions, gas phase reduction of aFe 2 O 3 nanowires [19], thermal decomposition of iron (II) oxalate nanorods [20], pyrolysis of ferrocene in supercritical carbon dioxide [21], and reversed precipitation of magnetite under magnetic field [22]. Magnetite nanotubes have also been prepared by template [23] or templateless hydrothermal synthesis [24].…”