A new contribution to the study of the electrosynthesis of magnetic nanoparticles: the influence of the supporting electrolyte

Marín, Tiffany; Ortega, Daniela E.; Montoya, Paula; Arnache, O.; Calderón, Jorge A.

doi:10.1007/s10800-014-0766-z

Cited by 9 publications

(14 citation statements)

References 20 publications

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“…Going into further detail regarding the fit results of subspectra, one of the interesting aspects was found at sites B, where a marked variation of the following hyperfine parameters was noted: H f , IS and peak widths (w). The changes in the first parameter, H f , in this case are lower than the stoichiometric magnetite 36,52,55,68 .…”

Section: Mössbauer Spectroscopymentioning

confidence: 75%

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Influence of Surface Treatment on Magnetic Properties of Fe₃O₄ Nanoparticles Synthesized by Electrochemical Method

et al. 2016

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The changes of magnetic properties in magnetite nanoparticles during two different stabilization processes were investigated. Magnetic nanoparticles (MNPs) were obtained by electrochemical synthesis from two kinds of salts: (CH3)4NCl and NaCl. After that, two methods-steric and electrostatic-were used to stabilize MNPs with oleic acid (OA) and sodium hydroxide (NaOH), respectively. As a consequence, aqueous and organic dispersions were obtained after surface modification. The coated nanoparticles were characterized by TEM, zeta potential, thermogravimetry analysis (TGA), cyclic voltammetry (CV), magnetization measurements, and infrared and Mössbauer spectroscopy. The results showed that the particles were between 8 and 13 nm in size. In addition, the MNPs were coated with negative charge layers from NaOH by physisorption and coated with carboxylate groups from OA by the chemisorption process, and hence, they exhibited different reactivity and behavior depending on the nature of the electrolyte used in the electrochemical synthesis. Furthermore, the uncoated and coated MNPs had a narrow size distribution. Additionally, the saturation magnetization values showed dependence on the magnetite synthesis conditions and surface modifiers.

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Section: Mössbauer Spectroscopymentioning

confidence: 75%

“…Magnetite nanoparticles were synthetized and characterized with a protocol published elsewhere 36 . The MNPs were obtained using 100 mA.cm -2 at room temperature by galvanostatic method.…”

Section: Electrochemical Synthesis Of Magnetite Nanoparticlesmentioning

confidence: 99%

Influence of Surface Treatment on Magnetic Properties of Fe₃O₄ Nanoparticles Synthesized by Electrochemical Method

et al. 2016

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“…The literature describes many methods of electrochemical preparation of magnetic nanoparticles [ 4 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 ]. Moreover, a lot of articles indicate a significant impact of the density (J) and potential (E) of used redox systems on the prepared MNPs size as well as the possibility of its control [ 57 , 58 , 61 , 62 , 63 ]. In one of them, magnetite nanoparticles, ranging in size from 20 to 30 nm, were produced by electro-oxidation using iron as an electrode material: anode and cathode.…”

Section: Synthesis Of Magnetite Nanoparticles—chemical Methodsmentioning

confidence: 99%

Polymer-Coated Magnetite Nanoparticles for Protein Immobilization

et al. 2021

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Since their discovery, magnetic nanoparticles (MNPs) have become materials with great potential, especially considering the applications of biomedical sciences. A series of works on the preparation, characterization, and application of MNPs has shown that the biological activity of such materials depends on their size, shape, core, and shell nature. Some of the most commonly used MNPs are those based on a magnetite core. On the other hand, synthetic biopolymers are used as a protective surface coating for these nanoparticles. This review describes the advances in the field of polymer-coated MNPs for protein immobilization over the past decade. General methods of MNP preparation and protein immobilization are presented. The most extensive section of this article discusses the latest work on the use of polymer-coated MNPs for the physical and chemical immobilization of three types of proteins: enzymes, antibodies, and serum proteins. Where possible, the effectiveness of the immobilization and the activity and use of the immobilized protein are reported. Finally, the information available in the peer-reviewed literature and the application perspectives for the MNP-immobilized protein systems are summarized as well.

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“…Fe3O4-NPs were synthesized by electrochemical oxidation of a low-carbon steel bar in the electrolyte of 0.1M NaCl dissolved in ethanol:water (1:1) solution, as described by T. Marín et al [11]. Pristine CMFs were synthesized by the electrospinning technique at 9 kV, using polyacrylonitrile (PAN) as a precursor, with a gap between needle-tip and the collector of 12 cm [12].…”

Section: Materials Synthesismentioning

confidence: 99%

Development of a flexible anode for lithium-ion batteries from electrospun carbon-magnetite composite microfibers

Marquez

Arroyave

Láinez

et al. 2021

Rev.Fac.Ing.Univ.Antioquia

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The development of a binder-free material is gaining ground as a flexible anode in lithium-ion batteries due to the higher specific capacity and possibilities of usage in portable appliances. In this work, magnetite nanoparticles (Fe3O4-NPs) were incorporated into carbon microfibers (CMFs) by electrospinning technique to improve the specific capacity of active material, retaining the high flexibility of the CMFs. The composite active material (CMFs-Fe3O4) was characterized by Raman spectroscopy, Thermogravimetric analyses (TGA), and transmission electron microscopy (TEM) to determine the composition, structure, and morphology of the composite. Electrochemical tests were done to evaluate the performance of the composite material as an anode in lithium-ion batteries. Fe3O4-NPs with particle sizes from 30 to 40 nm were incorporated into CMFs (800 nm), and the TEM images showed a homogeneous distribution of Fe3O4-NPs. The electrochemical tests evidenced that magnetite incorporation increases the specific capacity by 42% on the first cycle and 20% on the 50th cycle. Similarly, the Coulombic efficiency increases by 20% in the composite material.

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A new contribution to the study of the electrosynthesis of magnetic nanoparticles: the influence of the supporting electrolyte

Cited by 9 publications

References 20 publications

Influence of Surface Treatment on Magnetic Properties of Fe₃O₄ Nanoparticles Synthesized by Electrochemical Method

Influence of Surface Treatment on Magnetic Properties of Fe₃O₄ Nanoparticles Synthesized by Electrochemical Method

Polymer-Coated Magnetite Nanoparticles for Protein Immobilization

Development of a flexible anode for lithium-ion batteries from electrospun carbon-magnetite composite microfibers

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A new contribution to the study of the electrosynthesis of magnetic nanoparticles: the influence of the supporting electrolyte

Cited by 9 publications

References 20 publications

Influence of Surface Treatment on Magnetic Properties of Fe3O4 Nanoparticles Synthesized by Electrochemical Method

Influence of Surface Treatment on Magnetic Properties of Fe3O4 Nanoparticles Synthesized by Electrochemical Method

Polymer-Coated Magnetite Nanoparticles for Protein Immobilization

Development of a flexible anode for lithium-ion batteries from electrospun carbon-magnetite composite microfibers

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Product

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Influence of Surface Treatment on Magnetic Properties of Fe₃O₄ Nanoparticles Synthesized by Electrochemical Method

Influence of Surface Treatment on Magnetic Properties of Fe₃O₄ Nanoparticles Synthesized by Electrochemical Method