Preparation of hollow microspheres of Ce 3+ doped NiCo ferrite with high microwave absorbing performance

Duan, Huajun; Zhou, Fangling; Cheng, Xia; Chen, Guohong; Li, Qiaoling

doi:10.1016/j.jmmm.2016.10.069

Cited by 39 publications

(4 citation statements)

References 11 publications

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“…Hollow microspheres of Ce 3+ -doped NiCo-ferrites were synthesized using a carbon sphere as a template in a template-based deposition and surface reaction method [60]. The hydrothermal method showed the particle size of carbon sphere as 0.5 µm, while the template-based method showed the particle size of Ni 0.5 Co 0.5 Fe 2 O 4 as 300 nm.…”

Section: Methods Of Synthesis Of Ferrites and Their Nanocompositesmentioning

confidence: 99%

A Review on Impacting Parameters for Photocatalytic Degradation of Organic Effluents by Ferrites and Their Nanocomposites

et al. 2023

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Traditional wastewater treatment methods, such as reverse osmosis, adsorption, desalination, and others, are outweighed by the photocatalytic degradation of organic pollutants. Ferrites are prominent photocatalysts due to their tunable band gaps, surface areas, and magnetic properties, which render photodegradation economical. Ferrites and their nanocomposites have been reported as promising visible light active photocatalysts. The photocatalytic system is heavily reliant on a number of factors that influence the photodegradation of organic effluents. This review demonstrates various parameters such as substrate concentration, pH of solution, photocatalyst quantity, photocatalyst surface area, metal and non-metal ion doping, light intensity, irradiation time, quenchers, etc. affecting the photocatalytic degradation of organic effluents by ferrite nanoparticles and their nanocomposites in detail. The photodegradation efficiency of the ferrite nanoparticles alters with the change in the value of pH of the solution, which further depends upon the nature of the pollutant used. A dose of the substrate and the photocatalyst must be optimized so as to attain better photodegradation efficiency. Photocatalysts with different surface areas change the amount of active sites, which in turn affects the degradation of pollutant and render it a crucial factor. In addition, the mechanism of the action of photocatalysis is elaborated in this review. Future research perspectives for the advancement of ferrites and their nanocomposites are deliberated in order to improve their use as photocatalysts.

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Section: Methods Of Synthesis Of Ferrites and Their Nanocompositesmentioning

confidence: 99%

A Review on Impacting Parameters for Photocatalytic Degradation of Organic Effluents by Ferrites and Their Nanocomposites

et al. 2023

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“…The optimized electric resistivity shows that the prepared samples are applicable for decreasing eddy current losses at large frequency regions and can be suitable for multilayer chip inductor (MLCI) devices (Kakade, Kambale, Kolekar, & Ramana, 2016). H-z Duan et al investigated the influence of rare earth cation on absorbing and magnetic properties of Ce doped Ni-Co hollow spheres nanoparticles synthesized via hydrothermal method (Duan, Zhou, Cheng, Chen, & Li, 2017).…”

Section: Introductionmentioning

confidence: 99%

Role of Tb-Cr Substitution on the Structural and Magnetic Properties of Cobalt Ferrites

Hameed

Khaliq

2021

J. Mat. Phy.

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The impact of Tb-Cr substitution in cobalt-based ferrites having composition Co1-xTbxFe2-yCryO4 (x=0.0-0.1, y=0.0-0.5) prepared by solid state reaction method on structural, magnetic and dielectric parameters was explored. Structural analysis was carried out by X-ray diffraction technique. A variation in lattice parameter (a) was observed as a function of doping. The lattice constant ‘a’ increases from 8.37 Å to 8.39 Å, whereas crystallite size (D) decreases from 44 nm to 28 nm with Tb-Cr substitution. Unit cell volume was found in the range 586.8 Å3 - 590.6 Å3. X-ray density, bulk density as well as porosity were also affected with the inclusion of Tb-Cr ions. Saturation magnetization and remanence were observed to decrease from 62 emu/g to 51 emu/g and 13.38 emu/g to 8.29 emu/g, respectively with the addition of Tb-Cr contents. The incorporation of Tb-Cr cations caused the decrease in dielectric parameters like dielectric constant as well as dielectric loss.

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“…In recent years, there have been many attempts to improve the efficiency of shielding films and some of the methods reported were as follows. Substitute various elements for the bivalent Fe sites in the Fe 3 O 4 spinel ferrite structure [8][9][10][11], control the content of substituted or doped elements [12,13], and optimize the thickness of the shielding film [14,15]. On the other hand, excellent characteristics of a one-dimensional structure like porosity, a large specific area, and improved charge mobility have been attracting more attention because of their potential value in various applications, such as solar cells [16,17], photocatalysts [18][19][20], biosensors, and medical tissues [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Magnetic Properties of NiZn Ferrite Nanofibers Prepared by Electrospinning

Kim

Song

et al. 2019

Applied Sciences

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When the size of a material is decreased to the nanoscale, the effects of forces that are not influential on a macroscopic scale become increasingly important and the electronic structure is improved. The material then exhibits significantly different physical and chemical properties than in the bulk state. The smaller the size of the material, the more exposure it receives to the nano effects, and the physical properties can be changed via size control. In this study, Ni0.5Zn0.5Fe2O4 ferrite nanofibers were prepared by electrospinning, and the sizes of the prepared samples were controlled to ensure different average diameters by controlling the polymer concentration of the precursor solution. Field emission scanning electron microscope images showed that the samples had average diameters of 224 to 265 nm. The single crystal phase of Ni0.5Zn0.5Fe2O4 and the different crystallite sizes of 13 to 20 nm were confirmed by X-ray diffraction analysis. The magnetization behavior of the samples was measured using a vibrating sample magnetometer and the result confirmed that the samples had different magnetic properties, according to the diameter and crystallite size of the nanofibers. This study suggests that control of magnetic properties and excellent electrical conductivity in a one-dimensional nanostructure can be positively applied to improve the performance of a filler for the electromagnetic-interference shielding film.

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Preparation of hollow microspheres of Ce 3+ doped NiCo ferrite with high microwave absorbing performance

Cited by 39 publications

References 11 publications

A Review on Impacting Parameters for Photocatalytic Degradation of Organic Effluents by Ferrites and Their Nanocomposites

A Review on Impacting Parameters for Photocatalytic Degradation of Organic Effluents by Ferrites and Their Nanocomposites

Role of Tb-Cr Substitution on the Structural and Magnetic Properties of Cobalt Ferrites

Magnetic Properties of NiZn Ferrite Nanofibers Prepared by Electrospinning

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