Characterization of Ni ferrites powders prepared by plasma arc discharge process

Safari, A.; Gheisari, Kh.; Farbod, Mansoor

doi:10.1016/j.jmmm.2016.07.024

Cited by 17 publications

(7 citation statements)

References 20 publications

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“…The M−H curve exhibits ferrimagnetic characteristics, with an s‐shaped pattern at lower fields and a linear variation at higher fields. In contrast to the theoretical value of 51.1 emu/g estimated by Safari et al ., [46] the measured Ms value is found to be 18.415 emu/g. The imperfections in ion distribution at tetrahedral and octahedral sites may lead to the deviations from Neel's two‐sublattice theory in the spinel lattice‘s net magnetization, and the presence of a canted structure could explain the lower experimental Ms values [47] .…”

Section: Resultscontrasting

confidence: 96%

Probing the p‐type Chemiresistive Response of NiFe₂O₄ Nanoparticles for Potential Utilization as Ethanol Sensor

Bhagat,

Gupta,

Mandal

et al. 2023

Chemistry An Asian Journal

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Detection of gas molecules and volatile organic compounds (VOCs) using efficient, low cost sensors has fetched significant attention in environmental monitoring, safety measures and medical diagnosis. In the present work, nickel ferrite (NFO) nanoparticles are explored as p‐type semiconducting metal oxide (SMO) sensor for detection of five different organic vapors namely methanol, ethanol, n‐propanol, iso‐propanol and acetone which often cause severe damage to human body under prolonged exposure. The sensing studies in presence of the aforementioned five vapors are carried out by varying the sensor operating temperature (225–300 °C) and vapor concentrations (10–1000 ppm). Developed NFO sensor demonstrated best performance in terms of sensing (~10 ppm), response time (<10 s), excellent repeatability and selectivity towards ethanol among all other considered gas species. The repeatability of the sensor response is verified and the underlying reasons for the variation in the response of NFO sensor due to the change of operating temperature, analyte type and concentrations has been discussed. The synthesis of NFO through auto combustion method and study on their formation behaviour, oxygen vacancy evolution, band gap calculation, crystalline nature as well as microstructural features provides here the comprehensive information about the potential application of NFO nanoparticles as gas sensor.

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Section: Resultscontrasting

confidence: 96%

Probing the p‐type Chemiresistive Response of NiFe₂O₄ Nanoparticles for Potential Utilization as Ethanol Sensor

Bhagat,

Gupta,

Mandal

et al. 2023

Chemistry An Asian Journal

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“…The results showed a decrease in lattice parameter values from 8.4404 Å (ZF) to 8.3857 Å (NZF) with Nickel content (x=0.6). This finding is in constancy with gradual substitution of Zn 2+ ions of larger ionic radius in ZF spinel by Ni 2+ ions with smaller ionic radius (0.83 Å vs 0.74 Å) in NZF nanoparticles [42][43][44][45][46]. The lattice parameter "a" is in good agreement with the standard JCPDS value of 8.441 Å (JCPDS No.…”

Section: Atomic Composition C19h10br4o5s λMax (Nm) 592supporting

confidence: 68%

NZF Nanoscale Particles: Synthesis, Characterization and its Effective Adsorption of Bromophenol Blue

Naceur

Abdelkader

Nadjia

et al. 2020

Bull. Chem. React. Eng. Catal.

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The ferrospinels NixZn1_xFe2O4 (x = 0.0 and 0.6) nanoparticles (NPs) were successfully prepared by a sol-gel method and analyzed by TGA/DTA, XRD, SEM-EDS, UV-Vis-DRS, and pHIEP. The adsorption potential of NZF NPs towards the Bromophenol blue (BPB) dye was investigated. The batch adsorption efficiency parameters were studied including contact time, pH, initial dye concentrations and catalyst dosage. Results indicated that NZF crystallized in single-phase and exhibited smaller crystallite size (49 nm vs. 59.24 nm) than that of the pristine (ZF). The SEM analysis showed that the materials are elongated-like shape. NZF catalyst showed a red-shift of absorption bands and a more narrowed band gap (2.30 eV vs. 1.65 eV) as compared to ZF. The adsorption process was found to be highly dependent to the pH of the solution, dye concentration and adsorbent dose. Under optimum conditions of 5 mg.L–1 BPB, 0.5 g.L–1 NZF catalyst, pH = 6, and 25 °C, up to ≈ 86.30% removal efficiency could be achieved after 60 min. Pseudo-second-order kinetic model gave the best fit with highest correlation coefficients (R2 ≥ 0.99). A high specific surface area, a stabilized dispersion state of NZF NPs and the electrostatic interaction between the BPB-2 anions and the NZF-H3O+ active sites on NZF surface were believed to be the main factors that can be responsible for the high adsorption efficiency. Copyright © 2020 BCREC Group. All rights reserved

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“…The prepared bars cylindrical were used as an electrode in the vertical reaction chamber of an arc plasma reaction reactor. Additional details regarding the experimental setup and procedure have been reported elsewhere [25,27]. A Philips x-ray goniometer (PW-1840) equipped with Cukα 1 radiation (λ = 0.154 nm) was utilized to obtain the x-ray powder diffraction (XRD) pattern for the powders.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…One of the main benefits of the PAD method, compared to other techniques, is that it provides a high reaction temperature as well as a relatively high cooling effect. Therefore, ultra-fine particles with a narrow particle size distribution can be easily and quickly obtained through this process [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Magnetic and electrical transport properties of Cu_0.5Ni_0.5Fe₂O₄ ferrite synthesized by plasma arc discharge process

Maghazei,

Gheisari,

Ranjbar

et al. 2023

Phys. Scr.

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In this study, the plasma arc discharge process was employed to synthesize nanocrystalline Cu0.5Ni0.5Fe2O4 ferrite powders. The formation of a spinel-type structure of ferrite has been confirmed using X-ray diffraction. X-ray diffraction analysis conclusively verified the formation of a spinel-type ferrite structure. The investigation involved studying the frequency and temperature dependence of dielectric permittivity, dielectric loss, and DC/AC conductivity over a broad frequency range (1 kHz–1 MHz) in a temperature range of 298 K–403 K. The highest value of the dielectric contestant (4746) is observed at a frequency of 1 kHz and temperature of 313 K. A maximum in the DC conductivity is observed at 403 K, which can be ascribed to the combined effects of thermally activated hopping and an increase in the concentration of both n-type and p-type charge carriers at higher temperatures.

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Characterization of Ni ferrites powders prepared by plasma arc discharge process

Cited by 17 publications

References 20 publications

Probing the p‐type Chemiresistive Response of NiFe₂O₄ Nanoparticles for Potential Utilization as Ethanol Sensor

Probing the p‐type Chemiresistive Response of NiFe₂O₄ Nanoparticles for Potential Utilization as Ethanol Sensor

NZF Nanoscale Particles: Synthesis, Characterization and its Effective Adsorption of Bromophenol Blue

Magnetic and electrical transport properties of Cu_0.5Ni_0.5Fe₂O₄ ferrite synthesized by plasma arc discharge process

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Characterization of Ni ferrites powders prepared by plasma arc discharge process

Cited by 17 publications

References 20 publications

Probing the p‐type Chemiresistive Response of NiFe2O4 Nanoparticles for Potential Utilization as Ethanol Sensor

Probing the p‐type Chemiresistive Response of NiFe2O4 Nanoparticles for Potential Utilization as Ethanol Sensor

NZF Nanoscale Particles: Synthesis, Characterization and its Effective Adsorption of Bromophenol Blue

Magnetic and electrical transport properties of Cu0.5Ni0.5Fe2O4 ferrite synthesized by plasma arc discharge process

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Product

Resources

About

Probing the p‐type Chemiresistive Response of NiFe₂O₄ Nanoparticles for Potential Utilization as Ethanol Sensor

Probing the p‐type Chemiresistive Response of NiFe₂O₄ Nanoparticles for Potential Utilization as Ethanol Sensor

Magnetic and electrical transport properties of Cu_0.5Ni_0.5Fe₂O₄ ferrite synthesized by plasma arc discharge process