Effect of grain size on the magnetic properties of superparamagnetic Ni0.5Zn0.5Fe2O4 nanoparticles by co-precipitation process

Chen, D.G.; Tang, Xin‐Gui; Wu, Jiangbin; Zhang, W.; Liu, Q.X.; Jiang, Yaqi

doi:10.1016/j.jmmm.2011.02.002

Cited by 65 publications

(18 citation statements)

References 37 publications

(55 reference statements)

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“…The La 2 NiMnO 6 (LNMO) nanocomposites were synthesized by co-precipitation, using La(NO 3 ) 3 ·5H 2 O(99.5%), Ni(CH 3 COO) 2 ·4H 2 O (98%), and Mn(CH 3 COO) 4 ·4H 2 O(99%) as starting raw materials [16]. The raw powders were dissolved in deionized water in required stoichiometric proportions.…”

Section: Methodsmentioning

confidence: 99%

Double-perovskite magnetic La2NiMnO6 nanoparticles for adsorption of bovine serum albumin applications

Tang

et al. 2013

Nanoscale Res Lett

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Double-perovskite La2NiMnO6 (LNMO) nanoparticles were synthesized by co-precipitation process, and the adsorption of bovine serum albumin (BSA) protein on these nanoparticles was carried out. The powder samples were annealed at 750, 850, 950, and 1,050°C, respectively. X-ray diffraction (XRD) results reveal that there are double perovskites and exhibit mixed orientations, without any impurity phases. Transmission electron microscopy results as well as the XRD estimate results show that the crystalline size is about 34 to 40 nm. The adsorption of BSA on the magnetic nanoparticles was analyzed using a UV spectrophotometer at room temperature. The results show that the as-prepared LNMO nanoparticles display a good adsorbing ability for BSA, and the nanoparticle sintered at 850°C has the highest value of 219.6 mg/g, which is much higher than others.

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Section: Methodsmentioning

confidence: 99%

Double-perovskite magnetic La2NiMnO6 nanoparticles for adsorption of bovine serum albumin applications

Tang

et al. 2013

Nanoscale Res Lett

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“…10 Such a result would be not possible without enormous efforts in the development of fabrication, [11][12][13][14] characterization techniques 15,16 and basic theory in the magnetism of the fine particles 17,18 and assemblies of ferromagnetic nanoparticles. 19 There are different physical and chemical methods for fabrication of the oxide MNPs: hydrothermal synthesis, 11 microemulsion, 12 chemical co-precipitation, 16,20 oxidation of Fe(OH) 2 , 21 heating the material with different types of irradiation, 22 autocombustion, 4 and biomioneralization 23 etc. Despite the advantages of traditional chemical techniques for the iron oxide synthesis there are well known disadvantages, such as low production rates, limited purity or a high environmental cost of the final product, clear deviations from the sphericity, and wide size distributions, etc.…”

Section: Introductionmentioning

confidence: 99%

Iron oxide nanoparticles fabricated by electric explosion of wire: focus on magnetic nanofluids

et al. 2012

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Nanoparticles of iron oxides (MNPs) were prepared using the electric explosion of wire technique (EEW). The main focus was on the fabrication of de-aggregated spherical nanoparticles with a narrow size distribution. According to XRD the major crystalline phase was magnetite with an average diameter of MNPs, depending on the fraction. Further separation of air-dry EEW nanoparticles was performed in aqueous suspensions. In order to provide the stability of magnetite suspension in water, we found the optimum concentration of the electrostatic stabilizer (sodium citrate and optimum pH level) based on zeta-potential measurements. The stable suspensions still contained a substantial fraction of aggregates which were disintegrated by the excessive ultrasound treatment. The separation of the large particles out of the suspension was performed by centrifuging. The structural features, magnetic properties and microwave absorption of MNPs and their aqueous solutions confirm that we were able to obtain an ensemble in which the magnetic contributions come from the spherical MNPs. The particle size distribution in fractionated samples was narrow and they showed a similar behaviour to that expected of the superparamagnetic ensemble. Maximum obtained concentration was as high as 5 % of magnetic material (by weight). Designed assembly of de-aggregated nanoparticles is an example of on-purpose developed magnetic nanofluid

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“…Lower activation energy clearly promotes the interface diffusion between crystal cells so that the courses could be related to lower annealing temperatures. 20 Fig . 3 shows room-temperature hysteresis loops of the samples annealed at 400, 500, 600, 700 and 800 • C for 2 h. The samples annealed at 400 • C up to 700 • C do not reach saturation even at a magnetic field of 10KOe.…”

Section: Resultsmentioning

confidence: 99%

“…At high fields, the formula can be simplified as M(H)=M S (1-a/H), 20 where M(H) is the magnetization for an applied field H, and M S represents the saturation magnetization. By applying the magnetization curves to the formula, saturation magnetization could be approximately determined.…”

Section: Resultsmentioning

confidence: 99%

Structure and magnetic properties of Mg0.35Cu0.2Zn0.45Fe2O4 ferrite synthesized by co-precipitation method

Yang

Wang

2017

AIP Advances

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Mg0.35Cu0.2Zn0.45Fe2O4 nanosize particles have been synthesized by chemical co-precipitation method and characterized by X-ray diffraction (XRD) and vibrating sample magnetometry (VSM). The XRD patterns confirmed the single phase spinel structure of the synthesized powder. The average crystallite size of the powder varied from 14 to 55 nm by changing annealing temperature. The activation energy for crystal growth was estimated as about 18.61KJ/mol. With the annealing temperature increasing, saturation magnetization (MS) was successively increased while the coercivity (HC) was first increased, passed through a maximum and then declined. The sintering temperature has significant influence on bulk density, initial permeability and Curie temperature of Mg0.35Cu0.2Zn0.45Fe2O4 ferrite.

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Effect of grain size on the magnetic properties of superparamagnetic Ni0.5Zn0.5Fe2O4 nanoparticles by co-precipitation process

Cited by 65 publications

References 37 publications

Double-perovskite magnetic La2NiMnO6 nanoparticles for adsorption of bovine serum albumin applications

Double-perovskite magnetic La2NiMnO6 nanoparticles for adsorption of bovine serum albumin applications

Iron oxide nanoparticles fabricated by electric explosion of wire: focus on magnetic nanofluids

Structure and magnetic properties of Mg0.35Cu0.2Zn0.45Fe2O4 ferrite synthesized by co-precipitation method

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