Dielectric and magnetic properties of Nickel ferrite ceramics using crystalline powders derived from DL alanine fuel in sol–gel auto-combustion

Chauhan, Lalita; Shukla, Anoop Kumar; Sreenivas, K.

doi:10.1016/j.ceramint.2015.03.014

Cited by 130 publications

(48 citation statements)

References 35 publications

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“…The identified organic compounds of E. cognata are decanoic acid, octodrine, cyclobutanol, d‐alanine. The synthetic d‐alanine, decanoic acid, and cylcobutonal have been used as fuel and reducing agents in the synthesis of nanomaterials in numerous studies . Therefore, the present study demonstrated that E. cognata have significant phytoconstituents that could be use as reducer and stabilize to fabricate nanomaterial.…”

Section: Resultsmentioning

confidence: 99%

Effect of NiO on organic framework functionalized ZnO nanoparticles for energy storage application

et al. 2020

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Functionalization of metal oxides nanomaterial by different organic and inorganic species could considerably enhance the electrochemical performance of a supercapacitor. Here, we have synthesized and functionalized ZnO nanoparticles (NPs) via organic compounds of E. cognate and then doped the synthesized nanomaterials by NiO following hydrothermal route involving the bioactive compounds. As synthesized ZnO@NiO was analyzed by field emission-scanning electron microscopy at nanoscale. The organic functional groups were delineated by X-ray photoelectron spectroscopy as well as by Fourier transform infrared spectroscopy. What is more, Tauc plot revealed drastically decreased band gap energy of ZnO@NiO to 2.48 eV resulting in an enhanced electrochemical properties. Therefore, organic framework derived ZnO@NiO nanomaterial was scrutinized as an electrode for supercapacitor by galvanostatic charge-discharge, cyclicvoltammetry and electrochemical impedance spectroscopy. ZnO@NiO electrode demonstrated specific capacitance of 185 Fg −1 by cyclicvoltammetry, proposing its potential towards supercapacitor due to nanoscale particles and incorporated C, O, and N atoms of organic compounds. K E Y W O R D Sbio-template, low band gap energy, nanostructures, stabilizing agents, supercapacitor, zinc oxides: nickel oxide

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Section: Resultsmentioning

confidence: 99%

Effect of NiO on organic framework functionalized ZnO nanoparticles for energy storage application

et al. 2020

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“…The resistivity of materials greatly depends on its microstructure: the porosity and the distribution of grains. The lowering of resistivity for x=0.05 contents may be explained using the microstructure (figure 3(f)) of substituted compositions and the improved connectivity between the grains [83]. From figures 3(d)-(e), it is seen that the grains distribution are more homogeneous for x=0.05 than that for x=0.03 and 0.04; and expected to have the improved connectivity between the grains.…”

Section: Resistivitymentioning

confidence: 90%

Mechanical behavior, enhanced dc resistivity, energy band gap and high temperature magnetic properties of Y-substituted Mg–Zn ferrites

Ali

Khan

Hossain

et al. 2020

Mater. Res. Express

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We report the synthesis of Y-substituted Mg-Zn [Mg 0.5 Zn 0.5 Y x Fe 2−x O 4 (0x0.05)] ferrites using conventional standard ceramic technique. The samples were characterized by x-ray diffraction (XRD) analysis, field emission scanning electron microscopy (FESEM), FTIR spectroscopy, UV-Vis spectroscopy and quantum design physical properties measurement system (PPMS). XRD patterns confirm the single phase cubic spinel structure up to x=0.03 and appearance of a secondary phase of YFeO 3 for higher Y contents. FESEM images depict the distribution of grains and EDS spectra confirmed the absence of any unwanted element. Completion of solid state reaction and formation of spinel structure has been revealed from FTIR spectra. The FTIR data along with lattice constant, bulk density and porosity were further used to calculate the stiffness constant (C ij ), elastic constant and Debye temperatures. Mechanical stability of all studied compositions is confirmed from C ij using Born stability conditions. Brittleness and isotropic nature are also confirmed using Poisson's ratio and anisotropy constants, respectively. The enhancement of dc electrical resistivity (10 5 Ω cm to 10 6 Ω cm) with Y content is observed. The energy band gap (increased with Y contents) is found in good agreement with dc electrical resistivity. Ferrimagnetic to paramagnetic phase change has been observed from the field dependent high temperature magnetization curves. The magnetic moments and saturation magnetization were found to be decreased with increasing temperature. The Curie temperature (T c ) has been measured from temperature dependent magnetic moment (M-T) and initial permeability (μ′ i -T) measurements and found to be in good agreement with each other. Decrease in T c with Y content is due to redistribution of cations and weakening of the exchange coupling constant. The magnetic phase transition has been analyzed by Arrott plot and found to have second order phase transition. The dc resistivity endorses the prepared ferrites are suitable for high frequency and high temperature magnetic device applications as well.Mg-Zn ferrite is one of the most used soft ferrites because of its high electrical resistivity, low cost, low dielectric loss, high mechanical hardness and superior environmental stability [13]. Mg-Zn ferrites with higher resistivity (10 6 -10 7 Ω cm) make its suitability in high frequency applications [13]. Most of (∼ 90%) Mg 2+ ions are located on the B-sites and small fraction (∼10%) occupies in the A-sites [14,15]. However, the Zn 2+ ions have a preference to occupy A-sites in the spinel lattice [16,17]. The Fe 3+ ions are distributed on both A-and B-sites [18]. Therefore, the physical properties of the Mg-Zn ferrites are determined by the cations distribution over the A-and B-sites. The physical properties can be altered by introducing the different metallic ions results the cations distribution modification on the A-and B-sites. The factors that determine cation distributions are ionic radius, charge, site preference and le...

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“…EDX spectrum ( Figure 2B , studies where they illustrated the minimum particle agglomeration and reduce size due to effect of phytochemicals [9,14,16]. [50]. To examine the surface chemistry and oxidation states of phytofabricated MoO 3 NPs X-ray photoelectron spectroscopy was carried out.…”

Section: Phytofabricated Moo 3 Nanoparticlesmentioning

confidence: 99%

“…Although its peak area is not significant yet it has noteworthy effect on NPs synthesis, as D-alanine has been reported as promising fuel for synthesis of diverse materials like nanoparticles, ceramics, etc. [50]. Third identified phytochemical as capping agent is acetic acid.…”

Section: Phytofabricated Moo 3 Nanoparticlesmentioning

confidence: 99%

Chromatographic identification of “green capping agents” extracted from Nasturtium officinale (Brassicaceae) leaves for the synthesis of MoO₃ nanoparticles

Shaheen

Ahmad

2019

J of Separation Science

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A low-temperature, efficient and effective method was investigated for phytochemical hydroethanolic extraction of Nasturtium officinale (Brassicaceae). The phytocompounds of the selected plant leaves were identified by high-performance liquid chromatography, gas chromatography with mass spectroscopy, Fourier transform infrared spectroscopy, and ultraviolet-visible spectroscopy. Acetic acid, D-alanine, octodrine, decanoic acid, and cyclohexylethylamine were the major phytocompounds identified in N. officinale leaves with high similarity match and spectral purity. The reducing and stabilizing potential of the extracted phytochemicals was demonstrated by synthesizing the metal oxide nanoparticles (MoO 3 ) by treating ammonium heptamolybdate tetrahydrate (H 4 MO 7 N 6 O 24 .4H 2 O) aqueous complex with bioactive compounds of the leaves. The bio-synthesized MoO 3 nanoparticles were characterized by ultraviolet-visible spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction, energy dispersive X-ray spectroscopy, field emission-scanning electron microscopy, and gas chromatography with mass spectroscopy. Gas chromatographymass spectroscopy identified acetic acid, D-alanine, and octodrine as stabilizing agents in the synthesis of MoO 3 nanoparticles. K E Y W O R D Sacetic acid, capping agents, D-alanine, octodrine, phytochemicals 598

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Dielectric and magnetic properties of Nickel ferrite ceramics using crystalline powders derived from DL alanine fuel in sol–gel auto-combustion

Cited by 130 publications

References 35 publications

Effect of NiO on organic framework functionalized ZnO nanoparticles for energy storage application

Effect of NiO on organic framework functionalized ZnO nanoparticles for energy storage application

Mechanical behavior, enhanced dc resistivity, energy band gap and high temperature magnetic properties of Y-substituted Mg–Zn ferrites

Chromatographic identification of “green capping agents” extracted from Nasturtium officinale (Brassicaceae) leaves for the synthesis of MoO₃ nanoparticles

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Dielectric and magnetic properties of Nickel ferrite ceramics using crystalline powders derived from DL alanine fuel in sol–gel auto-combustion

Cited by 130 publications

References 35 publications

Effect of NiO on organic framework functionalized ZnO nanoparticles for energy storage application

Effect of NiO on organic framework functionalized ZnO nanoparticles for energy storage application

Mechanical behavior, enhanced dc resistivity, energy band gap and high temperature magnetic properties of Y-substituted Mg–Zn ferrites

Chromatographic identification of “green capping agents” extracted from Nasturtium officinale (Brassicaceae) leaves for the synthesis of MoO3 nanoparticles

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Chromatographic identification of “green capping agents” extracted from Nasturtium officinale (Brassicaceae) leaves for the synthesis of MoO₃ nanoparticles