Association of structural and enhanced transport properties in RE substituted cobalt nanoferrites

Abbas, Syed Samar; Zahra, Fatima Tuz; Anis-ur-Rehman, M.

doi:10.1016/j.jallcom.2016.03.148

Cited by 13 publications

(3 citation statements)

References 19 publications

(13 reference statements)

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“…The final step involved weight loss of 1.3, 3.83 and 7.93% from 450 to 700°C for Cu 1 − x Zr x Fe 2 O 4 ( x = 0, 0.5, 1), respectively. The reason for this was the elimination of trapped gases from the samples . No weight loss above 700°C was observed for all three samples.…”

Section: Resultsmentioning

confidence: 82%

Dual functional novel catalytic Cu_1−xZr_xFe₂O₄ (x=0, 0.5, 1) nanoparticles for synthesis of polysubstituted pyridines and sunlight‐driven degradation of methylene blue

Singh

Rajput

Govil

et al. 2018

Applied Organom Chemis

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The effect of varied zirconium content on the structural, morphological, magnetic, optical, thermal and catalytic properties of nanoparticles of the ferrite Cu1 − xZrxFe2O4 (x = 0, 0.5, 1) was investigated. The mixed ferrite was synthesized by the auto‐combustion method using nitrates of respective metals and citric acid as a chelating agent. The as‐prepared nanoparticles showed dual benefits. They were employed as a heterogeneous catalyst for one‐pot synthesis of polysubstituted pyridine derivatives as well as for catalytic degradation of industrial waste dyes such as methylene blue (MB). The highlight of the research reported is the catalytic degradation of industrial waste (MB) with high efficiency in eluent of a wide range of pH (3–13). The proposed nanoparticles arguably offer certain great advantages that include: low cost, facile nature, anti‐leaching property, magnetic recoverability and recyclability. The characterization of the as‐synthesized nanoparticles was done using various techniques. The leaching study was carried out using inductively coupled plasma optical emission spectroscopy. The formation of organic products was confirmed using Fourier transform infrared and 1H NMR spectroscopies and examination of degradation products of MB dye was carried out using mass spectrometry and UV–visible spectroscopy.

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Section: Resultsmentioning

confidence: 82%

Dual functional novel catalytic Cu_1−xZr_xFe₂O₄ (x=0, 0.5, 1) nanoparticles for synthesis of polysubstituted pyridines and sunlight‐driven degradation of methylene blue

Singh

Rajput

Govil

et al. 2018

Applied Organom Chemis

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“…Te synthesis and characterization of nanoferrite particles are taking great interest due to their wide range of applications in many areas such as electrical [2], electronic [3], magnetic [4], and microwave absorption [5][6][7][8], and their outstanding properties such as the large surface area to volume ratio, high magnetic permeability, and high saturation magnetization [9].…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Interference Shielding and Characterization of Ni2+ Substituted Cobalt Nanoferrites Prepared by Sol-Gel Auto Combustion Method

Kuekha

Mubarak

Azhdar

2022

Advances in Materials Science and Engineering

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The structural, magnetic, and dielectric properties of a series of Ni2+ substituted cobalt nanoferrite particle samples with the composition Co1−xNixFe2O4 (where x = 0.0 ≤ x ≤ 1.0) synthesized by using the sol-gel auto combustion route are presented in this report. The electromagnetic interference shielding of Co1−xNixFe2O4/PVA nanocomposite films has been determined in the microwave X-band (8.2–12.4 GHz) frequencies. X-ray analysis revealed the single-phase formation of nickel-substituted cobalt nanoferrite samples. The decreasing trend of lattice parameters with Ni2+ substitution indicates the incorporation of Ni2+ into the crystal structure, obeying Vegard’s law. FTIR showed the absorption bands at 560–590 cm−1 ( v 1 ) and 390–400 cm−1 ( v 2 ) were attributed to (A-site) tetrahedral and (B-site) octahedral groups complex, respectively which confirm the spinel structure of the samples. Field emission scanning electron microscopy showed agglomerated grains of different sizes and shapes in the morphological observation. EDS reveals the chemical composition of the prepared samples. TEM analysis revealed that the synthesized particles were nearly monodisperse, show to be roughly spherical in shape, and have a polycrystalline nature. The dielectric constant and loss tangent (tanδ) is found to decrease with increasing frequency which shows normal behavior for ferrimagnetic materials. The magnetic properties determined using VSM have substantially changed with the substitution of Ni2+ ions. The saturation magnetization and the experimentally magnetic moment are observed to decrease with an increase in Ni2+ content x. A series of Co1−xNixFe2O4/PVA nanocomposite films are prepared by applying simple, rapid, and inexpensive methods for EMI shielding materials. The vector network analyzer data were used to evaluate the electromagnetic interference (EMI) shielding properties of the Co1−xNixFe2O4/PVA samples. At 9.2 GHz, a study of reflection loss showed a minimum reflection loss (RL) of −32.08 dB. Also, the synthesized Co1−xNixFe2O4/PVA nanocomposite samples show improved performance for EMI efficiency which proves the utility of this doping. With this low RL value, the results and techniques also promise a simple, effective approach to achieve light-weight Co1−xNixFe2O4/PVA nanocomposite films and make it excellent microwave absorbers, capable of working at gigahertz frequencies for application potentials in EMI shielding material, communication, radar stealth technology, and electronic warfare.

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“…The nano-level methodology initiated by Professor Feynman has witnessed drastic changes in the understanding of materials research over several decades [1]. Magnetic nanomaterials have a prominent place in established material science because of their importance in various technological areas [2,3].…”

Section: Introductionmentioning

confidence: 99%

Lanthanum dopedZn0.5Co0.5Lax<

Aslam

Rehman

Amin

et al. 2021

Journal of Physics and Chemistry of Solids

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Association of structural and enhanced transport properties in RE substituted cobalt nanoferrites

Cited by 13 publications

References 19 publications

Dual functional novel catalytic Cu_1−xZr_xFe₂O₄ (x=0, 0.5, 1) nanoparticles for synthesis of polysubstituted pyridines and sunlight‐driven degradation of methylene blue

Dual functional novel catalytic Cu_1−xZr_xFe₂O₄ (x=0, 0.5, 1) nanoparticles for synthesis of polysubstituted pyridines and sunlight‐driven degradation of methylene blue

Electromagnetic Interference Shielding and Characterization of Ni2+ Substituted Cobalt Nanoferrites Prepared by Sol-Gel Auto Combustion Method

Lanthanum dopedZn0.5Co0.5Lax<

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Association of structural and enhanced transport properties in RE substituted cobalt nanoferrites

Cited by 13 publications

References 19 publications

Dual functional novel catalytic Cu1−xZrxFe2O4 (x=0, 0.5, 1) nanoparticles for synthesis of polysubstituted pyridines and sunlight‐driven degradation of methylene blue

Dual functional novel catalytic Cu1−xZrxFe2O4 (x=0, 0.5, 1) nanoparticles for synthesis of polysubstituted pyridines and sunlight‐driven degradation of methylene blue

Electromagnetic Interference Shielding and Characterization of Ni2+ Substituted Cobalt Nanoferrites Prepared by Sol-Gel Auto Combustion Method

Lanthanum dopedZn0.5Co0.5Lax<

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Dual functional novel catalytic Cu_1−xZr_xFe₂O₄ (x=0, 0.5, 1) nanoparticles for synthesis of polysubstituted pyridines and sunlight‐driven degradation of methylene blue

Dual functional novel catalytic Cu_1−xZr_xFe₂O₄ (x=0, 0.5, 1) nanoparticles for synthesis of polysubstituted pyridines and sunlight‐driven degradation of methylene blue