Bismuth modified zinc ferrites for low-temperature ceramic co-firing technology

Chacko, Basil; Roy, Arindam; Richard, Annie; Swathy, J S; Avanish, Babu T.; Madhuri, W.

doi:10.1016/j.matchemphys.2021.125401

Cited by 9 publications

(4 citation statements)

References 39 publications

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“…The crystallite size is calculated using the Scherrer formula. 23 Further, the strain, 24 dislocation density, lattice parameter, 25 and density 26 of the samples are shown in Table 1 .…”

Section: Results and Discussionmentioning

confidence: 99%

Optical, Structural, and Magnetic Hyperthermia Properties of Yttrium Iron Garnet Synthesized by Hybrid Microwave-Assisted Hydrothermal and Sol–Gel Auto Combustion Routes

Chacko,

Thirumalasetty,

Vijayakanth

et al. 2023

ACS Omega

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Magnetic hyperthermia is an emerging technique used for the treatment of tumors, where the infected cells will be deactivated using the heat generated from magnetic particles. This study discusses the viability of yttrium iron garnet (YIG) in magnetic hyperthermia treatment. YIG is synthesized using hybrid microwaveassisted hydrothermal and sol−gel auto combustion techniques. The formation of the garnet phase is confirmed using powder X-ray diffraction studies. Further, the morphology and grain size of the material are analyzed and estimated with the help of field emission scanning electron microscopy. Transmittance and optical band gap are obtained using UV−visible spectroscopy. Raman scattering of the material is discussed to understand the phase and vibrational modes. The functional groups of garnet are studied using Fourier transform infrared spectroscopy. Further, the effect of the synthesizing routes on the characteristics of the materials is discussed. A relatively higher magnetic saturation value is observed in the hysteresis loop at room temperature of YIG samples, which is synthesized by a sol−gel auto combustion technique, and it confirms the ferromagnetic behavior. The colloidal stability and surface charge of the prepared YIG are evaluated by a zeta potential measurement. In addition, magnetic induction heating studies are carried out for both prepared samples. The specific absorption rates of 1 mg/mL concentration are 237 and 214 W/g at 35.33 kA/m and 316 kHz field of sol−gel auto combustion and hydrothermal methods, respectively. Due to their higher saturation magnetization of 26.39 emu/g, the sol−gel auto combustion method produced effective YIG and demonstrated superior heating efficiency than the hydrothermally prepared sample. The prepared YIG are biocompatible, and their hyperthermia properties may be explored in various biomedical applications.

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“…The crystallite size is calculated using the Scherrer formula. 23 Further, the strain, 24 dislocation density, lattice parameter, 25 and density 26 of the samples are shown in Table 1 .…”

Section: Results and Discussionmentioning

confidence: 99%

Optical, Structural, and Magnetic Hyperthermia Properties of Yttrium Iron Garnet Synthesized by Hybrid Microwave-Assisted Hydrothermal and Sol–Gel Auto Combustion Routes

Chacko,

Thirumalasetty,

Vijayakanth

et al. 2023

ACS Omega

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“…It is computed as the proportion of light lost by absorption and scattering per unit average distance. Additionally, the fraction of light lost by absorption and scattering per unit distance is measured by the coefficient of extinction (k), which may be computed using equation (3) [15].…”

Section: Extinction Coefficient (K)mentioning

confidence: 99%

Optical Properties Behavior of Barium W-type Ferrite doping by Zinc

H.Khoreem,

A.H.AL-hammadi

2024

Preprint

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The ceramic process was used for making the Barium w-type ferrite powder, which has the composition formula BaNi2-xZnxFe16O27, where x=0.0, 0.4, 0.8, 1.2, 1.6, and 2. In essence, the single-phase w-type hexagonal structure development is confirmed by the X-ray investigation. The concentration of zinc increases along with a modest increase in the lattice constant. An analysis of the sample using UV-VIS was done. Zinc may be obtained at varying concentrations, and it is discovered that band gaps exist in the semiconducting zone. There was a consistent variation in the optical constants of absorption coefficient, extinction coefficient, refractive index, and reflection with Zn content. It can be seen that the optical and electrical conductivity rise with photoenergy, and that the samples' conductivity peak grows as the Zn content decreases. As the electric susceptibility rises, it falls . When the concentration of zinc increases, the electric susceptibility falls.

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“…For instance, the layered configuration of bismuth dichalcogenides, characterized by Bi atom layers interposed within a hexangular lattice of transition metal atoms, imparts distinctive electric and ophthalmic properties. 13 heavy metals and hazardous dyes, has emerged as a focal point in bismuth-based materials. 14 Regrettably, the synthesis of Bi 2 O 3 nanosheets often necessitates high-temperature formulas or the application of harmful compounds, constraining their sensible applicability.…”

Section: Introductionmentioning

confidence: 99%

“…By adjustment of their composition and structure, materials based on bismuth may have tailored qualities, making them adaptable for various applications. For instance, the layered configuration of bismuth dichalcogenides, characterized by Bi atom layers interposed within a hexangular lattice of transition metal atoms, imparts distinctive electric and ophthalmic properties . Bi 2 O 3 , with its exceptional band gap suitable for visible light absorption and potent catalytic process in dismantling numerous toxins like heavy metals and hazardous dyes, has emerged as a focal point in bismuth-based materials .…”

Section: Introductionmentioning

confidence: 99%

Exfoliation of Bismuth Dichalcogenide Crystals into Bi₂O₃ Nanosheets for the Photocatalysis of Hexavalent Chromium and Azo Compounds

Xiong,

Wan,

Mia

et al. 2024

J. Phys. Chem. C

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The disintegration of crystals from bismuth dichalcogenides into Bi 2 O 3 nanosheets stands out as a favorable methodology for the photocatalysis of azo dyes and hexavalent chromium [Cr (VI)] in wastewater treatment. In this investigation, the synthesis of Bi 2 O 3 nanosheets via a simple sonication, utilizing N,N-dimethylformamide solvent, was explored. The Bi 2 O 3 powder's EDX spectra indicate peaks for Bi, O, and C at 82.94, 10.18, and 6.89%, respectively, whereas the Tauc plot yields a band gap of 2.67 eV, and its XRD pattern exhibits three distinct peaks, ( 120), ( 200), and (121), suggesting monoclinic Bi 2 O 3 formation. The obtained nanosheets exhibited significant surface area, rock-like shapes composed of multilayer sheets, single-crystalline attributes featuring a lattice spacing of 0.398 nm, and an optical band gap measuring 2.30 eV. Photocatalytic evaluations, employing methyl orange (MO) and Cr (VI), unveiled noteworthy efficiencies, reaching 78.5% within 240 min and 89.8% within 50 min under visible light, respectively. Both catalytic reactions conformed to pseudo-first-order kinetic , with kinetic constants (k) registering at 0.0023 and 0.044 min −1 for MO and Cr (VI), respectively. The photocatalysis process involves the coordinated transport of electrons (e − ) from the Bi 2 O 3 nanosheets to the MO/Cr (VI) adsorbed on their surface, leading to effective wastewater treatment. These findings underscore the promise of exfoliated Bi 2 O 3 nanosheets as an adept and efficient photocatalyst for MO/Cr (VI) contaminated wastewater treatment, featuring their notable contribution to advancing ecological water treatment methodologies.

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Bismuth modified zinc ferrites for low-temperature ceramic co-firing technology

Cited by 9 publications

References 39 publications

Optical, Structural, and Magnetic Hyperthermia Properties of Yttrium Iron Garnet Synthesized by Hybrid Microwave-Assisted Hydrothermal and Sol–Gel Auto Combustion Routes

Optical, Structural, and Magnetic Hyperthermia Properties of Yttrium Iron Garnet Synthesized by Hybrid Microwave-Assisted Hydrothermal and Sol–Gel Auto Combustion Routes

Optical Properties Behavior of Barium W-type Ferrite doping by Zinc

Exfoliation of Bismuth Dichalcogenide Crystals into Bi₂O₃ Nanosheets for the Photocatalysis of Hexavalent Chromium and Azo Compounds

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Bismuth modified zinc ferrites for low-temperature ceramic co-firing technology

Cited by 9 publications

References 39 publications

Optical, Structural, and Magnetic Hyperthermia Properties of Yttrium Iron Garnet Synthesized by Hybrid Microwave-Assisted Hydrothermal and Sol–Gel Auto Combustion Routes

Optical, Structural, and Magnetic Hyperthermia Properties of Yttrium Iron Garnet Synthesized by Hybrid Microwave-Assisted Hydrothermal and Sol–Gel Auto Combustion Routes

Optical Properties Behavior of Barium W-type Ferrite doping by Zinc

Exfoliation of Bismuth Dichalcogenide Crystals into Bi2O3 Nanosheets for the Photocatalysis of Hexavalent Chromium and Azo Compounds

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Product

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Exfoliation of Bismuth Dichalcogenide Crystals into Bi₂O₃ Nanosheets for the Photocatalysis of Hexavalent Chromium and Azo Compounds