Enhancement in dielectric and magnetic properties of Mg2+ substituted highly porous super paramagnetic nickel ferrite nanoparticles with Williamson-Hall plots mechanistic view

Hirthna,; Sendhilnathan, S.

doi:10.1016/j.ceramint.2017.08.090

Cited by 65 publications

(16 citation statements)

References 27 publications

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“…The lattice parameter also increases with the concentration of magnesium due to the large ionic radii of Mg 2+ which is of the order of 0.072 nm and is greater than that of Ni 2+ (0.069 nm) ion and Fe 3+ (0.0645 nm) ion. [ 18,19 ] This increase in lattice parameter obeys Vegard's law. [ 20 ] Similar results were reported by Chavan et al [ 18 ]…”

Section: Resultsmentioning

confidence: 94%

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Structural, Magnetic, and Optical Studies of Ni–Mg Ferrites Synthesized by Polyol Method

Dhanyaprabha

Jacob

Mohan

et al. 2021

Physica Status Solidi (a)

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Magnesium and nickel‐substituted ferrites belong to an important class of spinel ferrites with wide variety of applications. Herein, preparation and characterization of pure, single‐phase Ni–Mg ferrites using a cost‐effective method, which yield high‐quality nanosized particles with good chemical homogeneity, are reported. A series of NixMg(1−x)Fe2O4 nanocrystalline powders (x = 1,0.75,0.5,0.25,0) is prepared using polyol method and a detailed investigation on the effect of dopant substitution on microstructural magnetic as well as optical properties is conducted. The as‐prepared samples are subsequently characterized using X‐ray diffractometer (XRD), X‐ray photoelectron spectroscopy (XPS), Fourier‐transform infrared spectroscopy (FTIR), Field‐emission scanning electron microscope (FESEM), Brunauer, Emmett, and Teller (BET), Mossbauer spectroscopy, Vibrating sample magnetometer (VSM), and UV–visible diffuse reflectance spectroscopy. Rietveld refinement confirms the single‐phase cubic structure with Fd‐3m (227) space group of NixMg(1−x)Fe2O4 series. The cation distribution can be represented as [Mg(1−x−y)Fe(δ)]A[Mg(x)Ni(y)Fe(2−δ)]BO4. FTIR bands at the finger print region of ferrites and Mossbauer analysis confirms the proposed cation distribution from Rietveld refinement. The magnetic nature is confirmed from Mossbauer and VSM analysis. In VSM, the saturation magnetization of the samples exhibits an increasing trend with nickel substitution. The optical studies of the series NixMg(1−x)Fe2O4 are conducted by UV–visible diffuse reflectance spectroscopy.

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Section: Resultsmentioning

confidence: 94%

“…The reason behind this is the large ionic radii of Mg 2+ than that of Ni 2+ and Fe 3+ ions. [ 19,23 ] Also, the increase in L A and L B with increase in Mg 2+ indicates that the distance between magnetic ions increases with doping. [ 26 ]…”

Section: Resultsmentioning

confidence: 99%

Structural, Magnetic, and Optical Studies of Ni–Mg Ferrites Synthesized by Polyol Method

Dhanyaprabha

Jacob

Mohan

et al. 2021

Physica Status Solidi (a)

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“…Top-down options are preferred in the industry because they are more straightforward, less expensive, and easy to scale up production with. Although it is a viable green technique and requires limited manual operation, particle functionalization will be more problematic, and the resulting nanoparticles, through these inexpensive routes, will be in a wide distribution of size and shapes, which directly limits their utilization for biological applications [ 9 , 20 ]. A wide range of nanoparticles have been synthesized by mechanochemical processing, which is an alternative technique to synthesize particles with a mean size as low as 4 nm, low agglomeration, narrow size distributions, and uniformity of crystal structure and morphology [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Block Copolymer-Assisted Synthesis of Iron Oxide Nanoparticles for Effective Removal of Congo Red

et al. 2023

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Iron oxide nanoparticles (IONPs) were synthesized via a block copolymer-assisted hydrothermal method and the phase purity and the crystal structure were investigated by X-ray diffraction. The Rietveld analysis of X-ray diffractometer spectra shows the hexagonal phase symmetry of α-Fe2O3. Further, the vibrational study suggests Raman active modes: 2A1g + 5Eg associated with α-Fe2O3, which corroborates the Rietveld analysis and orbital analysis of 2PFe. The superparamagnetic behavior is confirmed by magnetic measurements performed by the physical properties measurement system. The systematic study of the Congo red (CR) interaction with IONPs using a UV-visible spectrophotometer and a liquid chromatography–tandem mass spectrometry system equipped with a triple quadrupole mass analyzer and an electrospray ionization interface shows effective adsorption. In visible light, the Fe2O3 nanoparticles get easily excited and generate electrons and holes. The photogenerated electrons reduce the Fe3+ ions to Fe2+ ions. The Fe2+/H2O2 oxidizes CR by the Fenton mechanism. The strong adsorption ability of prepared nanoparticles towards dyes attributes the potential candidates for wastewater treatment and other catalytic applications.

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“…Since the ionic radius of Ni 2+ (0.069 nm) is very close to that of Fe 3+ (0.0645 nm), it is very possible for Ni 2+ to enter the host crystal lattices . In addition, replacing higher valence cations with lower valence cations usually produces cavities for charge compensation, which may effectively change the electronic structure and improve the conductivity of the material .…”

Section: Introductionmentioning

confidence: 99%

Band-Gap Engineering of FeF₃·0.33H₂O Nanosphere via Ni Doping as a High-Performance Lithium-Ion Battery Cathode

Liu

Wang

Chen

et al. 2020

ACS Sustainable Chem. Eng.

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Iron-based fluorides, a kind of intercalation–conversion cathode material, are considered as one of the most promising candidate cathode materials for lithium-ion batteries due to their high capacity and cheap cost. Nevertheless, poor electrical conductivity and sluggish reaction kinetics upon cycling impede their practical application. Herein, Ni-doped FeF3·0.33H2O has been put forward and fabricated by a simple solvothermal method to overcome the above deficiency. The impact of Ni doping on the physical and electrochemical performances has been studied by first-principles calculations combined with comprehensive physicochemical characterizations. The results reveal that appropriate substitution of Fe sites by Ni can result in F vacancies without changing the intrinsic crystal structure, but it not only reduces the band gap and improves its intrinsic conductivity but also broadens the ion channel, thus facilitating the rapid transport of ions and electrons to acquire excellent electrochemical properties. Compared with the bare FeF3·0.33H2O, the appropriate amount (8%) of Ni2+ doping exhibits higher reversible capacity, longer cyclic stability, and better rate capability. It presents a 412 mAh g–1 initial discharge capacity and remains 264 mAh g–1 after 100 cycles at 0.25 C (1 C = 200 mA g–1) within a range of 1.5–4.5 V. Additionally, at 2.0 C, it still delivers a high discharge capacity of 248 mAh g–1. The excellent electrochemical performance is ascribed to the improvement of electronic conductivity and reaction kinetics caused by the moderate Ni doping.

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Enhancement in dielectric and magnetic properties of Mg2+ substituted highly porous super paramagnetic nickel ferrite nanoparticles with Williamson-Hall plots mechanistic view

Cited by 65 publications

References 27 publications

Structural, Magnetic, and Optical Studies of Ni–Mg Ferrites Synthesized by Polyol Method

Structural, Magnetic, and Optical Studies of Ni–Mg Ferrites Synthesized by Polyol Method

Block Copolymer-Assisted Synthesis of Iron Oxide Nanoparticles for Effective Removal of Congo Red

Band-Gap Engineering of FeF₃·0.33H₂O Nanosphere via Ni Doping as a High-Performance Lithium-Ion Battery Cathode

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Enhancement in dielectric and magnetic properties of Mg2+ substituted highly porous super paramagnetic nickel ferrite nanoparticles with Williamson-Hall plots mechanistic view

Cited by 65 publications

References 27 publications

Structural, Magnetic, and Optical Studies of Ni–Mg Ferrites Synthesized by Polyol Method

Structural, Magnetic, and Optical Studies of Ni–Mg Ferrites Synthesized by Polyol Method

Block Copolymer-Assisted Synthesis of Iron Oxide Nanoparticles for Effective Removal of Congo Red

Band-Gap Engineering of FeF3·0.33H2O Nanosphere via Ni Doping as a High-Performance Lithium-Ion Battery Cathode

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Product

Resources

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Band-Gap Engineering of FeF₃·0.33H₂O Nanosphere via Ni Doping as a High-Performance Lithium-Ion Battery Cathode