Hydrothermal synthesis of NiFe2O4 nano-particles: structural, morphological, optical, electrical and magnetic properties

Abstract

NiFe 2 O 4 nano-crystallites with an average diameter of 8.9 nm are synthesized via hydrothermal method. The single-phase spinel structure is confirmed from X-ray diffractograms. Morphology is analysed by transmission and field emission scanning electron microscopes. High specific surface area of 55.7 m 2 g −1 is obtained for nano-particles. The M-H loop and M-T curve behaviours are investigated by vibrating sample magnetometry. The optical band gap energy is estimated from the UV-visible spectrum. In addition, the frequency dependence of dielectric properties is investigated. Cole-Cole plots are drawn to study electrical conduction mechanism and the kind of relaxation-Debye or non-Debye type. Low a.c. conductivity and low magnetic losses are noticed at 5 MHz frequency, which are suitable for microwave device applications.

Role of Different Fuels and Sintering Temperatures in the Structural, Optical, Magnetic, and Photocatalytic Properties of Chromium-Containing Nickel Ferrite: Kinetic Study of Photocatalytic Degradation of Rhodamine B Dye

“…17 High magnetic saturation has been displayed by NiFe 2 O 4 nanoparticles due to their large surface area and small crystallite size. 18 The lower values of direct and indirect optical band gaps (1.55 and 1.7 eV, respectively) were observed for nickel ferrite nanoparticles exhibiting nanooctahedron morphology with higher magnetic saturation. 19 There are several reports on the influence of sintering temperature on different properties of ferrites.…”

“…Nickel ferrite (NiFe 2 O 4 ) has attracted the attention of the whole scientific community due to its potential properties such as high magnetocrystalline anisotropy and magnetic saturation, lower optical band gap, enhanced catalysis and photocatalysis, etc . High magnetic saturation has been displayed by NiFe 2 O 4 nanoparticles due to their large surface area and small crystallite size . The lower values of direct and indirect optical band gaps (1.55 and 1.7 eV, respectively) were observed for nickel ferrite nanoparticles exhibiting nano-octahedron morphology with higher magnetic saturation .…”

Effect of Calcination Temperature on Physical properties of Ni0.6Zn0.4Fe2O4 Ferrite nanoparticles

“…Nevertheless, these spinel structures will be again classi ed into three types (normal spinel, inverse spinel and mixed spinel) based on the degree of inversion (0 < δ < 1). The δ = 1, δ = 0 and δ = 0.25 for normal spinel, inverse spinel and mixed spinels, respectively [13]. Normally, the degree of inversion was inter-linked to the cation distribution between A and B-sites.…”

A molybdenum disulfide/nickel ferrite-modified voltammetric sensing platform for ultra-sensitive determination of clenbuterol under the presence of an external magnetic field

“…Recent years have seen renewed interest in spinel ferrite materials (MFe 2 O 4 ) due to their unique physical and chemical properties, for example, good biocompatibility, high chemical stability, diversity of redox states, low cost, and unique magnetic properties. [1][2][3][4][5][6][7][8] Here, NiFe 2 O 4 (NFO) is a special member of the spinel ferrite family (MFe 2 O 4 -M = Co 2+ , Mn 2+ , Ni 2+ , and Zn 2+ ) with an inverse spinel structure, in a bulk state. Fe 3+ ions occupy the tetrahedral sites, while the octahedral sites are shared by Fe 3+ and Ni 2+ ions.…”

“…Fe 3+ ions occupy the tetrahedral sites, while the octahedral sites are shared by Fe 3+ and Ni 2+ ions. 3 Previous studies pointed out that the surface, size, crystallinity, morphology, and composition strongly correlate with the physicochemical properties of spinel ferrite materials. [9][10][11][12][13] Moreover, these properties are inuenced by some advanced parameters such as dimension, dispersion, and surface area which can be changed by combining with various nanomaterials.…”