Gram scale synthesis of single crystalline nano-octahedron of NiFe2O4: Magnetic and optical properties

NiFe2O4nanoparticles: an efficient and reusable catalyst for the selective oxidation of benzyl alcohol to benzaldehyde under mild conditions

“… 18 There was no defined morphology and size of the formed NiFe 2 O 4 nanocrystal. Rafique et al reported the synthesis of NiFe 2 O 4 nanooctahedra in the gram scale via a hydrothermal method at 220 °C for 12 h. 19 Nejati et al reported the synthesis of NiFe 2 O 4 NPs by a hydrothermal method at different temperatures of 100, 130, and 150 °C for 18 h. 20 They used triethylamine in ethyl acetate solution to adjust the pH of the reaction mixture. They further investigated the inhibition of the surfactant (glycerol or sodium dodecyl sulphate) on particle growth.…”

Improving Electrocatalysts for Oxygen Evolution Using NixFe3–xO4/Ni Hybrid Nanostructures Formed by Solvothermal Synthesis

“…To further understand the enhanced electrocatalysis in the Ni x Fe 3– x O 4 /Ni nanocomposites, the role of the semiconductor/metal interface should be discussed. As a typical p-type semiconductor, NiFe 2 O 4 has a direct band gap of 1.55 eV and work function of 5.9 eV. − In contrast, the work function for Ni metal is 4.60 eV, indicating that Ni has higher Fermi energy. Thus, the electrons in Ni can easily pass through the Ni x Fe 3– x O 4 /Ni interface into Ni x Fe 3– x O 4 because of the good electrical contact and increase the Fermi level in Ni x Fe 3– x O 4 until work function equilibrium is achieved (illustrated in Figure A) .…”

Magnetic properties and structural analysis on spinel MnFe2O4 nanoparticles prepared via non‐aqueous microwave synthesis

“…The bulk saturation moment of MnFe 2 O 4 is significantly higher than for other spinel ferrites, e. g . NiFe 2 O 4 (2.2–2.3 μ B ), [24–26] or MgFe 2 O 4 (1.1–1.4 μ B ), [17,27,28] and comparable to the ones of Fe 3 O 4 (3.7–3.9 μ B ), [29–31] or CoFe 2 O 4 (3.6–4.0 μ B ) [24,32,33] . However, it should be noted that the influence of the inversion parameter on the magnetic properties is less pronounced for MnFe 2 O 4 , compared to other spinel ferrites, such as MgFe 2 O 4 or Fe 3 O 4 .…”

“…[16][17][18][19] Owning 3d 5 electronic high-spin configuration of Mn(II) and Fe(III) centers, [20] manganese ferrite (MnFe 2 O 4 ) is an interesting candidate for a functional material with a remarkable high saturation magnetization of 3.3-4.5 μ B per formula unit for the bulk state. [21][22][23] The bulk saturation moment of MnFe 2 O 4 is significantly higher than for other spinel ferrites, e. g. NiFe 2 O 4 (2.2-2.3 μ B ), [24][25][26] or MgFe 2 O 4 (1.1-1.4 μ B ), [17,27,28] and comparable to the ones of Fe 3 O 4 (3.7-3.9 μ B ), [29][30][31] or CoFe 2 O 4 (3.6-4.0 μ B ). [24,32,33] However, it should be noted that the influence of the inversion parameter on the magnetic properties is less pronounced for MnFe 2 O 4 , compared to other spinel ferrites, .…”