Magnetically retrievable nanoscale nickel ferrites: An active photocatalyst for toxic dye removal applications

Extensive Analysis on the Thermoelectric Properties of Aqueous Zn-Doped Nickel Ferrite Nanofluids for Magnetically Tuned Thermoelectric Applications

“…They exhibit both the magnetic and fluid properties, and their physical properties are tunable with an external magnetic field . Due to these unique properties, among other nanomaterials, magnetic nanofluids find wide applications including heat transfer, micro-mixing, hyperthermia, mobile separation, − and so forth; many reports are available on the impact of a magnetic field on the electrical, thermal, and viscous nature of these magnetic nanofluids. − The main challenge in the preparation of magnetic nanofluids is the agglomeration and sedimentation of magnetic nanoparticles in the base fluid due to the magnetic dipole interaction and van der Waals forces. To avoid such agglomeration and sedimentation, the size of the magnetic nanoparticles should be smaller than the critical limit so that the thermal energy overcomes the magnetic interaction energy.…”

“…These properties include high saturation magnetization, superparamagnetic nature, less coercivity, high resistivity, high electrical conductivity, high electrochemical stability, and permeability. In addition, Ni ferrites are unique in several properties with modified applications, such as high-frequency applications, electronic devices with low loss, and many technical applications, such as in magnetic fluids, catalysts, magnetic storage systems, photomagnetic materials, magnetic resonance imaging, site-specific drug delivery, sensors, and so on. ,,− It is well known that when the nickel ferrite is sufficiently doped with divalent atoms, it can show a great improvement in its physical properties . The divalent dopants, such as Co 2+ , Fe 2+ , Cr 2+ , Mn 2+ , Gd 2+ , and so forth, replace the nickel ions in the octahedral sites that leads to the linear variation in physical properties of nickel ferrite. − However, unlike other divalent dopants, zinc (Zn 2+ ) tends to occupy the tetrahedral site of nickel ferrite structure due to its higher ionic radius and completely filled electronic configuration.…”

Alkaline steaming-assisted conversion: a new strategy for the synthesis of pure NiFe2O4 and CoFe2O4 spinel ferrite nanoparticles

“…Magnetic nanoparticles, such as nano-ferrites, have been studied in the past few decades due to their potential applications in various research areas including biomedicine, [1][2][3][4] gas sensing, 5 catalysis, 6 heat transfer, 7 electronic devices and microwave absorbance. [8][9][10][11] Among these magnetic materials spinel ferrites, such as NiFe 2 O 4 , have excellent properties like low eddy-current loss, a narrow band gap, high electrical resistance and high permeability at high frequencies.…”

Study of the spectroscopic, magnetic, and electrical behavior of PVDF/PEO blend incorporated with nickel ferrite (NiFe2O4) nanoparticles

“…Nickel ferrite (NiFe 2 O 4 ) has many applications for its high magnetic anisotropy, high saturation magnetization, and supermagnetic structure. NiFe 2 O 4 has a wide range of magnetic properties based on particle size and morphology, such as super magnetic behavior [1][2][3][4][5][6][7][8][9][10][11].…”

“…Fig 10. The graph between M′ as a function and Log (f) of the frequency the PVDF/PEO with 10% wt of NiFe 2 O 4 in the range of temperatures from 30 to 120 °C…”