The synthesis of octahedral nanoparticles of magnetite

Hydrothermal synthesis of magnetite nanoparticlesviasequential formation of iron hydroxide precipitates

“…The ZFC and FC curves for the samples were separated even above room temperature, suggesting the presence of even stronger interactions between the adjacent Fe 3 O 4 grains [25]. The samples exhibited a ferromagnetic behaviour with a high saturation magnetisation, which was higher than that of -Fe 2 O 3 (56 emu/g), but a little bit lower than that of the corresponding bulk (92 emu/g) due to their smaller size [26]; this result was similar to those reported by Zaitsev et al [27] and Yu et al [28]. It was expected that the sample of Run No.…”

The distinct effects of Mn substitution on the reactivity of magnetite in heterogeneous Fenton reaction and Pb(II) adsorption

“…The particles were then separated by centrifugation at 3500 rpm for 5 min and washed with boiling distilled water, followed by an additional centrifugation. After 3-4 washings, the particles were collected and dried in a vacuum oven at 100°C for 24 h [26,38] …”

The valence and site occupancy of substituting metals in magnetite spinel structure Fe3−xMxO4 (M = Cr, Mn, Co and Ni) and their influence on thermal stability: An XANES and TG-DSC investigation

“…Fe 3 O 4 was synthesized by a precipitationeoxidation method [23]. Suitable amount of ferrous sulfate was dissolved in an HCl solution (total metal cation concentration z 0.90 mol L À1 ).…”