Single-Step Synthesis of Manganese Ferrite Nanoparticles with Enhanced Magnetization via Chemical Co-precipitation Route

Single-domain manganese ferrite nanoparticles were synthesized through one-step chemical co-precipitation technique using diethanolamine which acted simultaneously as precipitating and capping agent. The synthesized nanoparticles were characterized by XRD, FTIR, TGA, EDX, FESEM and VSM. XRD pattern showed the presence of peaks corresponding to the single-phase inverse spinel structure with an average crystallite size of 59.6 nm. The average particle size determined by FESEM was 46.8 nm. In addition, the magnetic properties of the nanoparticles analyzed by VSM exhibited nearly superparamagnetic property with a high saturation magnetization of 77.31 emu/g with little coercivity (10.53 emu/g) and remanence (9.32 emu/g) at 300 K temperature. TGA and FTIR results confirmed the binding of diethanolamine onto the surface of manganese ferrite nanoparticles. The synthesized nanoparticles exhibited single crystalline phase with improved magnetic properties.

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Influence of Cu on the Improvement of Magnetic Properties and Structure of L10 FePt Nanoparticles

Nanomaterials ◽

10.3390/nano11051097 ◽

2021 ◽

Vol 11 (5) ◽

pp. 1097

Author(s):

Luran Zhang ◽

Xinchen Du ◽

Hongjie Lu ◽

Dandan Gao ◽

Huan Liu ◽

...

Keyword(s):

Magnetic Properties ◽

Annealing Temperature ◽

Reduction Method ◽

Solid Phase ◽

Average Particle Size ◽

Fept Nanoparticles ◽

Average Particle ◽

Phase Reduction ◽

Different Temperatures ◽

One Step

L10 ordered FePt and FePtCu nanoparticles (NPs) with a good dispersion were successfully fabricated by a simple, green, one-step solid-phase reduction method. Fe (acac)3, Pt (acac)2, and CuO as the precursors were dispersed in NaCl and annealed at different temperatures with an H2-containing atmosphere. As the annealing temperature increased, the chemical order parameter (S), average particle size (D), coercivity (Hc), and saturation magnetization (Ms) of FePt and FePtCu NPs increased and the size distribution range of the particles became wider. The ordered degree, D, Hc, and Ms of FePt NPs were greatly improved by adding 5% Cu. The highest S, D, Hc, and Ms were obtained when FePtCu NPs annealed at 750 °C, which were 0.91, 4.87 nm, 12,200 Oe, and 23.38 emu/g, respectively. The structure and magnetic properties of FePt and FePtCu NPs at different annealing temperatures were investigated and the formation mechanism of FePt and FePtCu NPs were discussed in detail.

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Structural and Magnetic Properties of Co‒Mn Codoped ZnO Nanoparticles Obtained by Microwave Solvothermal Synthesis

Crystals ◽

10.3390/cryst8110410 ◽

2018 ◽

Vol 8 (11) ◽

pp. 410 ◽

Cited By ~ 6

Author(s):

Jacek Wojnarowicz ◽

Myroslava Omelchenko ◽

Jacek Szczytko ◽

Tadeusz Chudoba ◽

Stanisław Gierlotka ◽

...

Keyword(s):

Magnetic Properties ◽

Crystallite Size ◽

Doping Level ◽

Solvothermal Synthesis ◽

Zinc Acetate Dihydrate ◽

Average Particle Size ◽

Average Crystallite Size ◽

Average Particle ◽

Acetate Tetrahydrate ◽

Preparation Methods

Zinc oxide nanoparticles codoped with Co2+ and Mn2+ ions (Zn(1−x−y)MnxCoyO NPs) were obtained for the first time by microwave solvothermal synthesis. The nominal content of Co2+ and Mn2+ in Zn(1−x−y)MnxCoyO NPs was x = y = 0, 1, 5, 10 and 15 mol % (the amount of both ions was equal). The precursors were obtained by dissolving zinc acetate dihydrate, manganese (II) acetate tetrahydrate and cobalt (II) acetate tetrahydrate in ethylene glycol. The morphology, phase purity, lattice parameters, dopants content, skeleton density, specific surface area, average particle size, average crystallite size, crystallite size distribution and magnetic properties of NPs were determined. The real content of dopants was up to 25.0% for Mn2+ and 80.5% for Co2+ of the nominal content. The colour of the samples changed from white to dark olive green in line with the increasing doping level. Uniform spherical NPs with wurtzite structure were obtained. The average size of NPs decreased from 29 nm to 21 nm in line with the increase in the dopant content. Brillouin type paramagnetism and an antiferromagnetic interaction between the magnetic ions was found for all samples, except for that with 15 mol % doping level, where a small ferromagnetic contribution was found. A review of the preparation methods of Co2+ and Mn2+ codoped ZnO is presented.

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Fabrication and Magnetic Properties of Mn1 - xZnxFe2O4 (0 ≤ x ≤ 0.8) Nanoparticles

Communications in Physics ◽

10.15625/0868-3166/19/1/234 ◽

2009 ◽

Vol 19 (1) ◽

pp. 19-25

Author(s):

Pham Hoai Linh ◽

Tran Dang Thanh ◽

Do Hung Manh ◽

Nguyen Chi Thuan ◽

Le Van Hong ◽

...

Keyword(s):

Magnetic Properties ◽

Biomedical Applications ◽

Spinel Ferrite ◽

Average Particle Size ◽

Precipitation Method ◽

Average Particle ◽

Promising Candidate ◽

Zn Concentration ◽

Co Precipitation ◽

Curie Temperature Tc

In this paper, we report results on the fabrication and magnetic properties of spinel ferrite Mn1-xZnxFe2O4 (0 ≤ x ≤ 0.8) nanoparticles. The nanoparticles were synthesized by a co-precipitation method. The effects of substituting Zn for Mn on the magnetic properties and particles size were focused. It was found that the phase-formation temperature is 90OC and the average particle size decreases from 40 nm to 10 nm when increased Zn concentration from zero to 0.8. The Curie temperature TC strongly decreases from 585 K (x = 0) to 320 K (x = 0.8) concomitantly with a decrease of the saturation magnetization MS. With a TC of 320 K and MS of 17 emu/g, the x=0.8 sample could be a promising candidate for some biomedical applications.

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Study Microstructure of Fe3O4 Modification Using PEG 4000 form Iron Sand at Wari Ino Beach As A Biosensor Application

Indo J Chem Res ◽

10.30598//ijcr.2021.8-kur ◽

2021 ◽

Vol 8 (3) ◽

pp. 168-171

Author(s):

Kurnia Kurnia ◽

Meidy Kaseside ◽

Steven Iwamony

Keyword(s):

Average Particle Size ◽

Precipitation Method ◽

High Dispersion ◽

Average Particle ◽

X Ray Diffraction ◽

Xrd Pattern ◽

Peg 4000 ◽

Biosensor Application ◽

Scherrer Formula ◽

Co Precipitation

Fe3O4 encapsulated PEG form iron sand at wari ino beach has been successfully synthesized by co-precipitation method. The average particle size of the nanoparticle 11,3 nm was determined by scherrer formula. Fe3O4 modification PEG 4000 was successfully encapsulated the samples by the presence C-O-C and CH bonding that were characterized using Fourier Transform Infra Red (FTIR), X-Ray Diffraction (XRD) pattern shows that all samples are formed by single phase cubic spinel magnetite , and Scanning Electron Microscopy (SEM) shows the high dispersion capability while encapsulated process using PEG. The results of the characterization show that the Fe3O4 successfully encapsulated by PEG 4000.

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Synthesis and Characterization of Soft Magnetic Materials NixZn1-xFe2O4 (x = 0,2 – 0,8) Lombok Iron Sand with Co-precipitation Method

Journal of Technomaterials Physics ◽

10.32734/jotp.v3i1.5548 ◽

2021 ◽

Vol 3 (1) ◽

pp. 21-28

Author(s):

Nining S Asri

Keyword(s):

Crystal Structure ◽

Magnetic Properties ◽

Physical Properties ◽

Nickel Content ◽

Average Particle Size ◽

Precipitation Method ◽

Average Particle ◽

True Density ◽

Soft Magnetic ◽

Co Precipitation

The synthesis of soft magnetic NixZn1-xFe2O4 with variations in composition (x = 0,2 – 0,8) by the co-precipitation method has been carried out. The research objective was to determine the effect of x variation on the crystal structure, microstructure, magnetic properties, and density. The samples were characterized by their crystal structure using XRD, microstructure using FE-SEM, magnetic properties using VSM, and physical properties (True Density). The XRD analysis results obtained two phases, the major phase is nickel-zinc ferrite, and Fe2O3 shows as the minor phase. The crystal size increased and the lattice parameters decreased with the increase in nickel content. The results of FE-SEM analysis at x = 0.2 are spherical in shape with an average particle size found about 47.07 nm. The results of VSM analysis showed that the increase in nickel content, the higher the magnetization saturation value, and the super-paramagnetic properties of all samples obtained. The results of the analysis of physical properties show that true density decreases with an increase of nickel content in each sample.

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A correlated structural and electrical study of manganese ferrite nanoparticles with variation in sintering temperature

Modern Physics Letters B ◽

10.1142/s0217984917502360 ◽

2017 ◽

Vol 31 (26) ◽

pp. 1750236 ◽

Cited By ~ 3

Author(s):

Elangbam Chitra Devi ◽

Ibetombi Soibam

Keyword(s):

Structural Changes ◽

Spinel Phase ◽

Spinel Ferrite ◽

Average Crystallite Size ◽

Ferrite Nanoparticles ◽

Precipitation Method ◽

Manganese Ferrite ◽

Absorption Bands ◽

Metal Chlorides ◽

Co Precipitation

Manganese ferrite nanoparticles were prepared by chemical co-precipitation method. Metal chlorides and sodium hydroxide were used as precursor. The spinel phase formation of the prepared samples was confirmed by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). From the XRD data, the average crystallite size and lattice constant were calculated. FTIR spectra reveal the characteristic absorption bands of spinel ferrite due to M-O stretching vibrations in tetrahedral and octahedral sites. Manganese ferrite nanoparticles were further given sintering. The effect of sintering at different temperatures on the structural properties such as XRD, FTIR and electrical properties such as dielectric constant, dielectric loss and ac-conductivity was studied. Possible mechanism of structural changes and observed electrical behavior due to sintering is being discussed. A strong correlation has also been observed in the results obtained from different characterization techniques.

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Green Chemistry Preparation of thiochromeno[4,3-b]pyran and benzo[h]thiazolo[2,3-b]quinazoline Derivatives using HSBM Technique over ZnAl2O4 Nano-Powders

Combinatorial Chemistry & High Throughput Screening ◽

10.2174/1386207322666190617164617 ◽

2019 ◽

Vol 22 (6) ◽

pp. 421-427

Author(s):

Seyyed Jalal Roudbaraki ◽

Sadaf Janghorban ◽

Majid Ghashang

Keyword(s):

High Speed ◽

Average Particle Size ◽

Reaction Times ◽

Environmentally Friendly ◽

Average Crystallite Size ◽

Precipitation Method ◽

Average Particle ◽

Efficient Catalyst ◽

Quinazoline Derivatives ◽

Co Precipitation

Aim and Objective: The aim of this paper is to introduce HSBM as a green and environmentally friendly technique for the synthesis of thiochromeno[4,3-b]pyran and benzo[h]thiazolo[2,3-b]quinazoline derivatives over ZnAl2O4 nanopowders as an efficient catalyst. Materials and Methods: ZnAl2O4 nanopowders were synthesized via a co-precipitation of Zn(NO3)2 and Al(NO3)3 salts and were characterized by XRD, FE-SEM, TEM and DLS techniques. The as-prepared ZnAl2O4 nano-powders have been used as a catalyst on the synthesis of pyran nucleus using high-speed ball milling (HSBM) technique. The structure of products was confirmed with NMR analysis. Results: ZnAl2O4 exhibits a cubic crystal structure (Space group: Fd-3m) with the average crystallite size of 41 nm. The average particle size of ZnAl2O4 nano-powders determined by DLS technique is 55 nm. The catalytic activity of nano-powders was examined on the synthesis of 2- amino-4,5-dihydro-4-arylthiochromeno[4,3-b]pyran-3-carbonitriles, (8Z)-2-amino-8-arylidene-4,5, 7,8-tetrahydro-4-arylthiopyrano[4,3-b]pyran-3-carbonitriles, 4-aryl-3,4,5,6-tetrahydrobenzo[h]quinazoline- 2(1H)-thiones and 4-aryl-1,3,4,5-tetrahydro-2H-thiochromeno[4,3-d]pyrimidine-2-thione derivatives. All products were obtained in high yields with short reaction times. Conclusion: ZnAl2O4 nanopowders were prepared via a cost-effective co-precipitation method and showed good potential for the synthesis of 4H-pyran analogous in good yields. The salient advantages of HSBM technique include environmentally friendly with reduced solvents, is a simple technique and has low energy costs.

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Magnetic Properties of Mn-Zn Ferrite Nanoparticles Fabricated by Conventional Ball-Milling

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.124-126.891 ◽

2007 ◽

Vol 124-126 ◽

pp. 891-894

Author(s):

Hae June Je ◽

Byung Kook Kim

Keyword(s):

Magnetic Properties ◽

Ball Milling ◽

Average Particle Size ◽

Structural Disorder ◽

Ferrite Nanoparticles ◽

Average Particle ◽

Spin Disorder ◽

Heat Treated ◽

Zn Ferrite ◽

Surface Spin

Mn-Zn ferrite nanoparticles were fabricated via conventional ball-milling and their magnetic properties were investigated. By ball-milling of Mn0.53Zn0.42Fe2.05O4 agglomerates for 48h with and without a dispersant (Darvan-C (ammonium polymethacrylate)), nanoparticles having average particle size of 60 nm were obtained. The saturation magnetizations (Ms) of thus obtained Mn-Zn ferrite nanoparticles were 49 and 62 emu/g for dispersant-added and dispersant-non-added one, respectively. When the nanoparticles were heat-treated at 400, however, the Ms became comparable: 63 and 65 emu/g. When the nanoparticles were heat-treated at 600, moreover, the Ms became comparable with that of bulk ferrites: 75~78 emu/g. These magnetic properties were attributed to the surface spin disorder effects resulting from the coating of organic dispersant molecules on the surfaces of the nanoparticles as well the structural disorder on the surfaces the nanoparticles.

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