Influence of fuel to oxidizer ratio on LPG sensing performance of MgFe2O4 nanoparticles

Godbole, Rhushikesh; Rao, Pratibha; Alegaonkar, P.S.; Bhagwat, Sunita

doi:10.1016/j.matchemphys.2015.05.028

Cited by 48 publications

(16 citation statements)

References 34 publications

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“…[18]. Si hacemos una extrapolación a δ = 1.0 el momento magnético total tiende a ser nulo, en acuerdo con nuestros valores teóricos y los reportados [27][28][29].…”

Section: Estado Fundamental Estructural Y Magnéticounclassified

PROPIEDADES ESTRUCTURALES, MAGNÉTICAS E HIPERFINAS DE LA FERRITA MgFe2O4: ESTUDIO MEDIANTE CÁLCULOS AB-INITIO

Chanduví

Rebaza

Errico

2021

AnAFA

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We present here a first principles study of the structural, electronic, magnetic, and hyperfine properties of magnesium ferrite, MgFe2O4 (spinel structure). The study was carried out within the framework of Functional Density Theory (DFT) using the full potential linearized augmented plane waves method (FPLAPW) using both the Generalized Gradient (GGA) and the GGA+U approximations for the exchange and correlation potential. To discuss the magnetic ordering and the lowest energy structure of the system we consider different distributions of Mg and Fe ions in both cationic sites of the spinel structure, as well as different spin configurations. Our calculations predict that the equilibrium structure corresponds to an inverted antiferromagnetic configuration, in which the magnetic moments of the Fe atoms located at sites A are ferromagnetically ordered among themselves and antiferromagnetically with respect to the Fe located at the sublattice of sites B. Our GGA calculations underestimate the energy band-gap of the system, while GGA+U predict a band-gap of 2.3 eV, in excellent agreement with the reported values. The results for the hyperfine properties at the Fe sites (isomer shift, quadrupole splitting and hyperfine field) are in excellent agreement with the Mössbauer spectroscopy results reported in the literature, giving support to the equilibrium structure predicted by FP-LAPW.

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“…[18]. Si hacemos una extrapolación a δ = 1.0 el momento magnético total tiende a ser nulo, en acuerdo con nuestros valores teóricos y los reportados [27][28][29].…”

Section: Estado Fundamental Estructural Y Magnéticounclassified

PROPIEDADES ESTRUCTURALES, MAGNÉTICAS E HIPERFINAS DE LA FERRITA MgFe2O4: ESTUDIO MEDIANTE CÁLCULOS AB-INITIO

Chanduví

Rebaza

Errico

2021

AnAFA

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“…To a progressively essential degree, the expanded scaling down and data storage devices of new devices require the utilization of nanosized magnetic attractive particles [10,11]. Manganese spinel ferrite nanoparticles have gotten expanding consideration for their surprising magnetic properties, such as moderate saturation magnetization (M s ) and low coercivity with a mechanical hardness, high permeability, and good chemical stability [12,13]. The significance of thick manganese (Mn) spinel ferrites additionally lies in their potential application, for example, transformers, core materials for coils, information and communication devices, and so forth.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Structural, Microstructural, Dielectrical and Magnetic Properties of Bi3+ Doped Manganese Spinel Ferrite Nanoparticles for Photonic Applications

Angadi¹,

Lakshmiprasanna²,

Manjunatha³

2020

Bismuth - Fundamentals and Optoelectronic Applications

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The structural, microstructural, and magnetic properties of Mn1-xBixFe2O4 (where x = 0.0, 0.05, 0.1, 0.15, and 0.2) nanoparticles prepared by solution combustion method were investigated. Rietveld-refined X-ray diffraction patterns confirm the single-phase formation with space group Fd3m having spinel cubic structure. The porous nature of the samples was confirmed by scanning electron microscopy (SEM). Composition values of the theoretical stoichiometry and energy-dispersive spectroscopy (EDS) composition values are well matched for all samples. The dielectric parameters such as real part of dielectric constant, imaginary part of dielectric constant, and dielectric loss tangent decrease with the increase in frequency. The AC conductivity increases with increase in the Bi3+ concentration. The real part of complex impedance decreases with the increase in frequency. Cole-Cole plots reveal that one semicircle was obtained for each of the samples. The real and imaginary parts of electric modulus vary with frequency. The magnetic hysteresis curves of all samples reveal the soft magnetic material nature. We observed S esteems began uniquely from the higher superparamagnetic, we would have watched the monotonic decrease in S with increase in Bi3+ concentration. Furthermore, the magnetic parameters were estimated.

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“…are most employed MNPs for preparation of ferrofluid [32][33][34][35]. Among MNPs magnesium ferrite (MgFe 2 O 4 ) with high magnetic permeability, chemical and corrosive stability, biocompatibility and eco-friendly characteristics [36] is most usable ones in sensors, photocatalyst and heterogeneous catalyst as well as with potential application in ferrofluid [37][38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

Fast sono assisted ferrofluid mediated silver super – Adsorption over magnesium ferrite-copper sulfide chalcogenide with the aid of multivariate optimization

Rezaei

Beyki

Shemirani

2017

Ultrasonics Sonochemistry

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This research focuses on the development of a fast ultrasonic assisted ferrofluid mediated methodology to obtain the optimum conditions for silver adsorption from aqueous solutions. For this purpose magnesium ferrite-copper sulfide chalcogenide was synthesized and employed as an efficient nanosorbent. The sorbent was characterized with energy-dispersive X-ray spectroscopy (EDX), field emission scanning electron microscopy (FE-SEM), X-ray powder diffraction (XRD) and vibrational sample magnetometry (VSM) techniques. For obtaining the optimal operating conditions of silver adsorption, response surface methodology (RSM) was used. Tests were performed by Box-Behnken design (BBD). The value of optimum conditions for silver adsorption include pH=2.5, adsorbent dosage=10.0mg, sonicating time=1min and ionic strength=2.2%. According optimum conditions, percentage of removal should be 99.34%. With replication of similar experiment (n=6) average percentage of 100±0.95% was obtained for Ag adsorption which shows good agreement between predicted and experimental results. Silver ion adsorption follow Langmuir model with maximum sorption capacity of 2113mgg. Ultrasonic power helped to prepare ferrofluid and demonstrated that had an important role in better dispersing of it in solution and efficient adsorption of analyte.

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Influence of fuel to oxidizer ratio on LPG sensing performance of MgFe2O4 nanoparticles

Cited by 48 publications

References 34 publications

PROPIEDADES ESTRUCTURALES, MAGNÉTICAS E HIPERFINAS DE LA FERRITA MgFe2O4: ESTUDIO MEDIANTE CÁLCULOS AB-INITIO

PROPIEDADES ESTRUCTURALES, MAGNÉTICAS E HIPERFINAS DE LA FERRITA MgFe2O4: ESTUDIO MEDIANTE CÁLCULOS AB-INITIO

Investigation of Structural, Microstructural, Dielectrical and Magnetic Properties of Bi3+ Doped Manganese Spinel Ferrite Nanoparticles for Photonic Applications

Fast sono assisted ferrofluid mediated silver super – Adsorption over magnesium ferrite-copper sulfide chalcogenide with the aid of multivariate optimization

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