Optimization of the structural and magnetic properties of MnFe2O4 doped by Zn and Dy using Taguchi method

In recent years, cobalt ferrite has attracted considerable attention due to its unique physical properties. The present study aimed to produce cobalt ferrite magnetic nanoparticles doped with zinc and vanadium using the sol-gel auto-combustion method. For this purpose, Co1-xZnxFe2-yVyO4 (where x = 0.0, 0.1, 0.2, 0.5 and y = 0.00, 0.05, 0.15, 0.25) precursors were calcined at 800 °C for 3h. The prepared samples were characterized with the X-ray diffraction (XRD) method in combination with Rietveld structure refinement, field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FT-IR), and vibrating sample magnetometery (VSM). The XRD patterns confirmed the formation of crystalline spinel structure for all samples. However, the diffraction peaks of hematite and iron vanadium oxide phases were observed in the patterns of some doped samples. The average crystallite size for all the synthesized samples was found to be in the range of ~45–24 nm, implying that it decreased by simultaneously doping cobalt ferrite with Zn and V. The FT-IR spectrum confirmed the formation of the spinal structure of ferrite through the observed vibrational bands assigned to the tetrahedral (υ2) and octahedral (υ1) interstitial complexes in the spinel structure. The FE-SEM images showed that morphology, average grain size, and agglomeration of the synthesized powders were affected by doping, which was due to the interactions of the magnetic surface of nanoparticles. The VSM curves demonstrated that saturation magnetization and coercivity values changed in the range of 30–83 emu/g and from 27–913 Oe, respectively. These changes occurred due to the alteration in cation distribution in the spinel structure. This can be attributed to the change in superexchange interactions between magnetic ions by co-substitution of Zn and V ions in Cobalt ferrite and the changes in magnetocrystalline anisotropy.

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“…In addition, other peaks are marked, and sufficient description of them has been provided in previous articles [ 17 , 56 ].…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Zinc and Vanadium Co-Substituted CoFe2O4 Nanoparticles Synthesized by Using the Sol-Gel Auto-Combustion Method

et al. 2022

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“…On the other hand, MnFe 2 O 4 is considered one of the finest magnetic-material substitutes for Fe 3 O 4 owing to its outstanding physicochemical assets [ 17 , 18 ]. Nevertheless, bulk MnFe 2 O 4 could not efficiently eradicate heavy metal ions and dyes.…”

Section: Introductionmentioning

confidence: 99%

Manganese Ferrite–Hydroxyapatite Nanocomposite Synthesis: Biogenic Waste Remodeling for Water Decontamination

et al. 2022

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Environmental pollution, especially water pollution caused by dyes, heavy metal ions and biological pathogens, is a root cause of various lethal diseases in human-beings and animals. Water purification materials and treatment methods are overpriced. Consequently, there is an imperative outlook observance for cheap materials for the purification of wastewaters. In order to fill up the projected demand for clean water, the present study aimed to make use of cost-effective and environmentally friendly methods to convert bone-waste from animals such as cows into novel composites for the decontamination of water. The bone-waste of slaughtered cows from the Najran region of Saudi Arabia was collected and used for the synthesis of hydroxyapatite based on the thermal method. The synthesized hydroxyapatite (Ca10(PO4)6(OH)2) was utilized to prepare a manganese ferrite/hydroxyapatite composite. The nanocomposite was categorized by diverse sophisticated procedures, for instance XRD, FE-SEM, EDX, TEM, UV, PL and FT-IR. This composite possesses outstanding photocatalytic activity against methylene blue dye, which is a common pollutant from industrial wastes. Moreover, the synthesised composite revealed exceptional bacteriostatic commotion towards E. coli and S. aureus bacteria, which are accountable for acute waterborne infections. The outcome of this study demonstrated that the integration of manganese ferrite into hydroxyapatite significantly intensified both antimicrobial and photocatalytic actions when compared to the virgin hydroxyapatite.

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“…The rank represents the effects of various parameters on the indexes; therefore, the maximum difference of S/N ratio indicated the most important for the corresponding parameter. 51 3 | METHODOLOGIES OF CATALYST PREPARATION 3.1 | Support characterization…”

Section: Taguchi Methods Optimizationmentioning

confidence: 99%

“…The rank was calculated as the maximum S/N ratio subtracting the minimum S/N ratio for each parameter. The rank represents the effects of various parameters on the indexes; therefore, the maximum difference of S/N ratio indicated the most important for the corresponding parameter 51 …”

Section: Experimental Apparatus and Methodsmentioning

confidence: 99%

Optimal Fe/Ni/ Ca‐Al catalyst for tar model steam reforming by using the Taguchi method

Huang

Hsieh

Lasek

et al. 2022

Intl J of Energy Research

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Summary The goal of this research was to optimize the preparation conditions of a catalyst for tar reforming to produce syngas. The biomass tar model, consisting of 90 wt% toluene and 10% pyrene, was used instead of real biomass tar. The Ca/Al supports and active metals (Fe and Ni) were prepared by using the co‐precipitation and wet impregnation method, respectively. The gravimetric method and the gas chromatography were employed to assess the tar content and hydrogen production of the prepared catalysts for reducing tar formation. According to the Taguchi method, three operating parameters, including Ca/Al ratios of the support, calcination temperatures of the supports, and the loading content (wt%) of Fe and Ni active metals, were investigated. The results show that the optimized preparation conditions for minimizing tar residue were Ca/Al molar ratio of 2.5, the calcining temperature of 1073 K, 3 wt% Fe metal loading, and 7 wt% Ni metal loading, which could be validated with a small difference of less 1.4% than the prediction. Among these parameters, the content of Ni loading was both the primary factor in enhancing the tar conversion and hydrogen production.

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Optimization of the structural and magnetic properties of MnFe2O4 doped by Zn and Dy using Taguchi method

Cited by 21 publications

References 67 publications

Synthesis and Characterization of Zinc and Vanadium Co-Substituted CoFe2O4 Nanoparticles Synthesized by Using the Sol-Gel Auto-Combustion Method

Synthesis and Characterization of Zinc and Vanadium Co-Substituted CoFe2O4 Nanoparticles Synthesized by Using the Sol-Gel Auto-Combustion Method

Manganese Ferrite–Hydroxyapatite Nanocomposite Synthesis: Biogenic Waste Remodeling for Water Decontamination

Optimal Fe/Ni/ Ca‐Al catalyst for tar model steam reforming by using the Taguchi method

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