Multiferroic properties of Gd/Er doped chromium ferrite nano sized particles synthesized by citrate auto combustion method

Ateia, Ebtesam E.; Soliman, Fatma S.

doi:10.1016/j.mseb.2019.04.016

Cited by 19 publications

(3 citation statements)

References 46 publications

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“…The value of the squareness ratio (Mr/Ms) is an indication of the soft character of the nanoparticles and its value varies from 0 to 1 [42]. In the present case, the Li1.1Co0.3Fe2.1O4 sample interacts magneto statically according to Stoner-Wolfarth model [46]. The anisotropy constant is determined from the Stoner-Wohlfarth equation as follows…”

Section: Resultsmentioning

confidence: 98%

Assessing of channel structure and magnetic properties on heavy metal ions removal from water

Ateia

Arman

2021

J Mater Sci: Mater Electron

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The synthesis of Li1.1Co0.3Fe2.1O4 ferrite nanoparticles has been synthesized by the citrate auto combustion method. The distribution of cations on A-site and B-site was studied by X-ray Diffraction (XRD), High-Resolution Transmission Electron Microscopy (HRTEM). The crystallite size and strain were calculated by using the W-H (Williamson-Hall) plot. The crystallite of Li1.1Co0.3Fe2.1O4 ferrite nanoparticle is ∼30 nm. HRTEM confirmed the homogeneous formation of the cubic phase. The calculated height and spacing parameters related to roughness are essential to achieve the efficiency of Li1.1Co0.3Fe2.1O4 to be used in microbatteries, smart windows, smart mirrors, displays, gas sensors, and other applications. According to the obtained data, the Li1.1Co0.3Fe2.1O4 has a spiky surface with Rku = 5.50. Additionally, the magnetic hysteresis loop has been clarified using the Vibrating Sample Magnetometer (VSM). The double peak characteristic in the Switching field distribution (SFD) reveals the competition between exchange coupling and strong dipolar interactions. Li1.1Co0.3Fe2.1O4 has employed as a sorbent material for the removal of lead (II) ions from wastewater. The main advantages of the synthesized sample are ease of separation, high adsorption, low cost as well as recycled with notable efficiency. Two models of adsorption isotherms (Freundlich and Langmuir) are utilized to recognize the adsorption mechanism.

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Section: Resultsmentioning

confidence: 98%

Assessing of channel structure and magnetic properties on heavy metal ions removal from water

Ateia

Arman

2021

J Mater Sci: Mater Electron

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“…In the CuMnO 2 sample, the NPs are significantly agglomerated, likely due to the high surface energy and magnetic nature of Mn [35]. Additionally, magnetic interactions and weak Van der Waals bonds contribute to the formation of these agglomerates [36]. The FESEM and HRTEM images (see figures 3(d), (e) respectively) indicate good crystallinity.…”

Section: Fesem and Hrtemmentioning

confidence: 95%

Comparative study of the structural, magnetic and electrical properties of cuprous delafossites CuBO₂(B = Zn, Mn and Er) prepared using the flash auto-combustion technique

Ateia,

Soliman,

Morsy

2024

Phys. Scr.

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The flash auto-combustion method was utilized to produce Cu-based delafossites of CuBO2 (B = Zn, Mn, and Er). X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), and X-ray photoelectron spectroscopy (XPS) were employed to verify the phase formation, surface morphology, and oxidation states of the synthesized delafossite samples. The crystallite sizes were determined to be 43, 16.76, and 21.66 nm for CuZnO2, CuMnO2, and CuErO2 nanoparticles (NPs), respectively. The magnetic characteristics of CuZnO2, CuMnO2, and CuErO2 samples were studied at room temperature, revealing their paramagnetic nature through the hysteresis effect. The Seebeck coefficient (S) for CuZnO2 was found to be positive, while it was negative for CuMnO2 and CuErO2. The thermoelectric power of CuZnO2 NPs was high, indicating their potential as materials for more efficient thermoelectric devices. Additionally, CuZnO2 exhibited an antimicrobial response against four-gram (+ve) bacteria, four-gram (-ve) bacteria, and the fungus Candida albicans (CA). The data obtained demonstrated that CuZnO2 NPs altered bacterial cell morphology, ultimately leading to bacterial cell death.

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“…Since Cr exists mainly in the form of Fe-Cr crystals in the natural environment [19], the conversion of Cr into stable Fe-Cr crystals can significantly reduce its ecotoxicity due to oxidation. On the other hand, iron-chromium oxide (FeCrO 3 ) has a similar molecular formula to ilmenite, which display excellent chemical stability, thermal stability, magnetic properties, and specific catalytic capabilities [20][21][22]. Therefore, if the Cr in Cr-SS can be selectively converted into FeCrO 3 by direct reaction with iron, the simultaneous detoxification and stabilization of Cr can be effectively achieved, which provides a new strategy for the resource utilization of Cr-containing wastes.…”

Section: Introductionmentioning

confidence: 99%

Upcycling of Cr-Containing Sulfate Waste into Efficient FeCrO3/Fe2O3 Catalysts for CO2 Hydrogenation Reaction

Liu,

Chu,

et al. 2024

Materials

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Upcycling Cr-containing sulfate waste into catalysts for CO2 hydrogenation reaction benefits both pollution mitigation and economic sustainability. In this study, FeCrO3/Fe2O3 catalysts were successfully prepared by a simple hydrothermal method using Cr-containing sodium sulfate (Cr-SS) as a Cr source for efficient conversion and stable treatment of Cr. The removal rate of Cr in Cr-SS can reach 99.9% at the optimized hydrothermal conditions. When the synthesized catalysts were activated and used for the CO2 hydrogenation reaction, a 50% increase in CO2 conversion was achieved compared with the catalyst prepared by impregnation with a comparable amount of Cr. According to the extraction and risk assessment code (RAC) of the Reference Office of the European Community Bureau (BCR), the synthesized FeCrO3/Fe2O3 is risk-free. This work not only realizes the detoxification of the Cr-SS but transfers Cr into stable FeCrO3 for application in a catalytic field, which provides a strategy for the harmless disposal and resource utilization of Cr-containing hazardous waste.

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Multiferroic properties of Gd/Er doped chromium ferrite nano sized particles synthesized by citrate auto combustion method

Cited by 19 publications

References 46 publications

Assessing of channel structure and magnetic properties on heavy metal ions removal from water

Assessing of channel structure and magnetic properties on heavy metal ions removal from water

Comparative study of the structural, magnetic and electrical properties of cuprous delafossites CuBO₂(B = Zn, Mn and Er) prepared using the flash auto-combustion technique

Upcycling of Cr-Containing Sulfate Waste into Efficient FeCrO3/Fe2O3 Catalysts for CO2 Hydrogenation Reaction

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Multiferroic properties of Gd/Er doped chromium ferrite nano sized particles synthesized by citrate auto combustion method

Cited by 19 publications

References 46 publications

Assessing of channel structure and magnetic properties on heavy metal ions removal from water

Assessing of channel structure and magnetic properties on heavy metal ions removal from water

Comparative study of the structural, magnetic and electrical properties of cuprous delafossites CuBO2(B = Zn, Mn and Er) prepared using the flash auto-combustion technique

Upcycling of Cr-Containing Sulfate Waste into Efficient FeCrO3/Fe2O3 Catalysts for CO2 Hydrogenation Reaction

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Comparative study of the structural, magnetic and electrical properties of cuprous delafossites CuBO₂(B = Zn, Mn and Er) prepared using the flash auto-combustion technique