Synthesis and characterization of uniform fine particles of pure and chromium-substituted manganese ferrite with low dielectric losses

Akhtar, Khalida; Muhammad, Gul; Haq, Ikram Ul; Khan, Rafaqat Ali; Khan, Zia Ullah; Hussain, Abid

doi:10.1016/j.ceramint.2016.08.096

Cited by 16 publications

(3 citation statements)

References 55 publications

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“…Metal ferrites are ceramic substances made out of iron oxide in the form of MFe 2 O 4 , where M stands for divalent transition metallic ions (Jaid et al 2020 ). Due to the low cost, stable structure, and advantageous magnetic, electrical, and mechanical properties of nano-metal ferrites (Rajeevgandhi and Sivagurunathan 2019 ;Ansari et al 2018 ; Kafshgari et al 2019 ), they have been used as catalysts (Akhtar et al 2016 ; Kulkarni and Mathad 2021 ; Vijayaraghavan et al 2016 ). The use of ferrite nanoparticles as magnetic catalysts is very beneficial.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of synergistic approach of spinel cadmium–copper nanoferrites as magnetic catalysts for promoting wastewater decontamination: Impact of Ag ions doping

Mangood

Gemeay

Abdel-Galeil

et al. 2023

Environ Sci Pollut Res

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Metal substitution is an efficient strategy to improve the catalytic activity of ferrite-based catalysts. In this study, Cd0.5Cu0.5−xAgxFe2O4 (where 0 ≤ x ≤ 0.5) ferrites were fabricated via a simple co-precipitation method. The influence of the silver ions on the structural, magnetic, and catalytic characteristics of the spinel nanoparticles, as well as on their morphology, was examined. X-ray diffractograms revealed a crystalline cubic spinel structure with crystallite sizes in the nanoregime (7–15 nm). The saturation magnetization reduced from 29.8 to 2.80 emu as the Ag+ doping increased. Two prominent absorption bands were visible in Fourier-transform infrared spectra at 600 cm−1 and 400 cm−1, respectively, and they belonged to the tetrahedral (A) and octahedral (B) sites. The samples were then used as catalysts for the oxidative breakdown of the typical organic contaminant indigo carmine dye (IC). The catalytic process followed the first-order kinetic model, and the rate constant increased from 0.007 to 0.023 min−1 with increasing of Ag+ doping. Cd0.5Cu0.5-xAgxFe2O4 exhibited excellent catalytic performance in the pH range of 2–11, which means that they are promising efficient and stable materials for Fenton-based alkaline wastewater treatment. Finally, the pathway includes, HO•, HO2−•, and O2−• as oxidants resulted from the synergistic effects of Fe3+, Cu2+, and Ag+, with H2O2 and surface hydroxyl groups have been proposed. Graphical Abstract

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Section: Introductionmentioning

confidence: 99%

Evaluation of synergistic approach of spinel cadmium–copper nanoferrites as magnetic catalysts for promoting wastewater decontamination: Impact of Ag ions doping

Mangood

Gemeay

Abdel-Galeil

et al. 2023

Environ Sci Pollut Res

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“…They have been utilized in information storage systems, electronics, and telecommunication as [3] well as catalysts or catalytic supports due to their low cost, stable structure, and favourable magnetic, electrical, and mechanical qualities (Akhtar et al 2016;Kulkarni and Mathad 2021;Vijayaraghavan et al 2016). The characteristics of ferrites can be affected by many factors, including preparation conditions, size, microstructure, heat treatment, synthesis method and cation distribution between tetrahedral and octahedral site (Kulkarni and Mathad 2021), (Anantha Rao et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of synergistic approach of spinel cadmium–copper nanoferrites as magnetic catalysts for promoting wastewater decontamination: Impact of Ag ions doping

Mangood

Gemeay

Abdle-Galeil

et al. 2022

Preprint

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Ferrite magnetic nanoparticles are active in the advanced oxidation process (AOP), which catalyzes the decomposition of H2O2 generating reactive oxygen species (ROS). Noble metal substitution is an efficient strategy to improve the catalytic activity of ferrite-based catalysts. In this study, Cd0.5Cu0.5−xAgxFe2O4 (where 0 ≤ x ≤ 0.5) ferrites were fabricated via simple co-precipitation method. The influence of the silver ions on the structural, magnetic, and catalytic characteristics of the spinel nanoparticles, as well as on their morphology, was examined.. X-ray diffractograms revealed a single-phase cubic spinel structure in all the synthesized samples. The crystallite size was in the nanoregime (7–15 nm), and it decreased similarly to the saturation magnetization from 29.8 to 2.80 emu as the Ag+ doping increased. Two prominent absorption bands were visible in Fourier-transform infrared spectra at 600 cm− 1 and 400 cm− 1, respectively, and they belonged to the tetrahedral (A) and octahedral (B) sites. The samples were then used as catalysts for the oxidative breakdown of the typical organic contaminant indigo carmine dye (IC). The catalytic process followed the first-order kinetic model, and the rate constant increased from 0.007 to 0.023 min− 1 with increasing of Ag+ doping. Cd0.5Cu0.5−xAgxFe2O4 exhibited excellent catalytic performance in the whole pH range of 2–11, especially in the strong alkaline environment. Cd0.5Cu0.5−xAgxFe2O4 was a promising efficient and stable material for Fenton-based alkaline wastewater treatment. Finally, the pathway includes, HO•, HO2−•, O2−• as oxidants resulted from the synergistic effects of Fe3+, Cu2+, and Ag+, with H2O2 and surface hydroxyl groups has been proposed.

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“…Ferrite with MFe2O4 formula (M = Ni, Mn, Zn) crystallizes has various structures such as a normal spinel structure, mixed or in the perfectly inverse spinel structure [4]. Manganese ferrite (MnFe2O4) has advantages over other materials due to high electrical resistivity and low eddy current loss [5], large saturation magnetization and moderate coercivity [6]. While nickel ferrite is a technologically important material, used in a wide variety of applications, including computer components, transformer cores, isolators, circulators, microwave frequencies and others [7].…”

Section: Introductionmentioning

confidence: 99%

Effect of Ni on Dielectric Properties of MnNi-Fe2O4 Magnetic Nanoparticles

Zulkarnain

Suharyadi

2021

JMA

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Mn1-xNixFe2O4 nanoparticles were successfully synthesized using co-precipitation method with various Ni concentrations. The crystal structures and dielectric properties of nanoparticles were analyzed for different Ni concentrations. The crystallite size of nanoparticles decreased from 19.7 to 3.6 nm with the increase of Ni concentration from 0.3 to 0.8. The dielectric properties were studied at frequencies of 10 -1000 kHz. The dielectric permittivity (real and imaginary) decreased with the increase of frequency up to 200 kHz. The highest real dielectric permittivity (ε') was 343.3 and the imaginary dielectric permittivity (ε") was 440.5, for Ni concentration of 0.5 at frequency 10 kHz. Furthermore, the dielectric permittivity of the Mn1-xNixFe2O4 nanoparticles were dependent on the frequency. This type of behavior can be explained by the Maxwell-Wagner model.

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Synthesis and characterization of uniform fine particles of pure and chromium-substituted manganese ferrite with low dielectric losses

Cited by 16 publications

References 55 publications

Evaluation of synergistic approach of spinel cadmium–copper nanoferrites as magnetic catalysts for promoting wastewater decontamination: Impact of Ag ions doping

Evaluation of synergistic approach of spinel cadmium–copper nanoferrites as magnetic catalysts for promoting wastewater decontamination: Impact of Ag ions doping

Evaluation of synergistic approach of spinel cadmium–copper nanoferrites as magnetic catalysts for promoting wastewater decontamination: Impact of Ag ions doping

Effect of Ni on Dielectric Properties of MnNi-Fe2O4 Magnetic Nanoparticles

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