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Vasilev A, Efimov M, Muratov D, Chernavskii P, Cherednichenko K, Dzidziguri E, Karpacheva G. Fe-Co Alloy Nanoparticles Dispersed in Polymer-Derived Carbon Support: Effect of Initial Polymer Nature on the Size, Structure and Magnetic Properties. MATERIALS (BASEL, SWITZERLAND) 2023; 16:6694. [PMID: 37895676 PMCID: PMC10608119 DOI: 10.3390/ma16206694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 10/02/2023] [Accepted: 10/12/2023] [Indexed: 10/29/2023]
Abstract
Fe-Co alloy nanoparticles with different sizes, supported by carbon derived from several polymers, namely polyacrylonitrile, polyvinyl alcohol and chitosan, have been synthesized by a one-pot method involving simultaneous metal nanoparticle formation and polymer carbonization. The method involves the joint dissolution of metal salts and a polymer, followed by annealing of the resulting dried film. Detailed XRD analysis confirmed the formation of Fe-Co alloy nanoparticles in each sample, regardless of the initial polymer used. Transmission electron microscopy images showed that the Fe-Co nanoparticles were all spherical, were homogeneously distributed within the carbon support and varied by size depending on the initial polymer nature and synthesis temperature. Fe-Co nanoparticles supported by polyacrylonitrile-derived carbon exhibited the smallest size (6-12 nm), whereas nanoparticles on chitosan-derived carbon support were characterized by the largest particle size (13-38 nm). The size dependence of magnetic properties were studied by a vibrating sample magnetometer at room temperature. For the first time, the critical particle size of Fe-Co alloy nanoparticles with equiatomic composition has been experimentally determined as 13 nm, indicating the transition of magnetic properties from ferromagnetic to superparamagnetic.
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Affiliation(s)
- Andrey Vasilev
- A.V. Topchiev Institute of Petrochemical Synthesis RAS, Leninskiy Prospekt 29, Moscow 119991, Russia; (A.V.); (M.E.); (D.M.); (P.C.)
| | - Mikhail Efimov
- A.V. Topchiev Institute of Petrochemical Synthesis RAS, Leninskiy Prospekt 29, Moscow 119991, Russia; (A.V.); (M.E.); (D.M.); (P.C.)
| | - Dmitry Muratov
- A.V. Topchiev Institute of Petrochemical Synthesis RAS, Leninskiy Prospekt 29, Moscow 119991, Russia; (A.V.); (M.E.); (D.M.); (P.C.)
| | - Petr Chernavskii
- A.V. Topchiev Institute of Petrochemical Synthesis RAS, Leninskiy Prospekt 29, Moscow 119991, Russia; (A.V.); (M.E.); (D.M.); (P.C.)
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1–3, Moscow 119991, Russia
| | - Kirill Cherednichenko
- Department of Physical and Colloidal Chemistry, National University of Oil and Gas “Gubkin University”, Leninskiy Prospekt 65, Moscow 119991, Russia;
| | - Ella Dzidziguri
- Department of Functional Nanosystems and High-Temperature Materials, National University of Science and Technology “MISiS”, Leninskiy Prospekt 4, Moscow 119049, Russia;
| | - Galina Karpacheva
- A.V. Topchiev Institute of Petrochemical Synthesis RAS, Leninskiy Prospekt 29, Moscow 119991, Russia; (A.V.); (M.E.); (D.M.); (P.C.)
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Mourdikoudis S, Kostopoulou A, LaGrow AP. Magnetic Nanoparticle Composites: Synergistic Effects and Applications. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:2004951. [PMID: 34194936 PMCID: PMC8224446 DOI: 10.1002/advs.202004951] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Indexed: 05/17/2023]
Abstract
Composite materials are made from two or more constituent materials with distinct physical or chemical properties that, when combined, produce a material with characteristics which are at least to some degree different from its individual components. Nanocomposite materials are composed of different materials of which at least one has nanoscale dimensions. Common types of nanocomposites consist of a combination of two different elements, with a nanoparticle that is linked to, or surrounded by, another organic or inorganic material, for example in a core-shell or heterostructure configuration. A general family of nanoparticle composites concerns the coating of a nanoscale material by a polymer, SiO2 or carbon. Other materials, such as graphene or graphene oxide (GO), are used as supports forming composites when nanoscale materials are deposited onto them. In this Review we focus on magnetic nanocomposites, describing their synthetic methods, physical properties and applications. Several types of nanocomposites are presented, according to their composition, morphology or surface functionalization. Their applications are largely due to the synergistic effects that appear thanks to the co-existence of two different materials and to their interface, resulting in properties often better than those of their single-phase components. Applications discussed concern magnetically separable catalysts, water treatment, diagnostics-sensing and biomedicine.
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Affiliation(s)
- Stefanos Mourdikoudis
- Biophysics GroupDepartment of Physics and AstronomyUniversity College LondonLondonWC1E 6BTUK
- UCL Healthcare Biomagnetic and Nanomaterials Laboratories21 Albemarle StreetLondonW1S 4BSUK
| | - Athanasia Kostopoulou
- Institute of Electronic Structure and Laser (IESL)Foundation for Research and Technology‐Hellas (FORTH)100 Nikolaou PlastiraHeraklionCrete70013Greece
| | - Alec P. LaGrow
- International Iberian Nanotechnology LaboratoryBraga4715‐330Portugal
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Liang B, Wang S, Kuang D, Hou L, Yu B, Lin L, Deng L, Huang H, He J. Facile synthesis and excellent microwave absorption properties of FeCo-C core-shell nanoparticles. NANOTECHNOLOGY 2018; 29:085604. [PMID: 29300178 DOI: 10.1088/1361-6528/aaa52f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
FeCo-C core-shell nanoparticles (NPs) with diameters of 10-50 nm have been fabricated on a large scale by one-step metal-organic chemical vapor deposition using the mixture of cobalt acetylacetonate and iron acetylacetonate as the precursor. The Fe/Co molar ratio of the alloy nanocores and graphitization degree of C shells, and thus the magnetic and electric properties of the core-shell NPs, can be tuned by the deposition temperature ranging from 700 °C to 900 °C. Comparative tests reveal that a relatively high Fe/Co molar ratio and low graphitization degree benefit the microwave absorption (MA) performance of the core-shell NPs. The composite with 20 wt% core-shell NP obtained at 800 °C and 80 wt% paraffin exhibits an optimal reflection loss [Formula: see text] of -60.4 dB at 7.5 GHz with a thickness of 3.3 mm, and an effective absorption bandwidth (frequency range for RL ≤10 dB) of 9.2 GHz (8.8-18.0 GHz) under an absorber thickness of 2.5 mm. Our study provides a facile route for the fabrication of alloy-C core-shell nanostructures with high MA performance.
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Affiliation(s)
- Bingbing Liang
- School of Physics and Electronics, Central South University, Changsha, 410083, People's Republic of China
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Castrillón M, Mayoral A, Urtizberea A, Marquina C, Irusta S, Meier JG, Santamaría J. Synthesis and magnetic behavior of ultra-small bimetallic FeCo/graphite nanoparticles. NANOTECHNOLOGY 2013; 24:505702. [PMID: 24270853 DOI: 10.1088/0957-4484/24/50/505702] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
FeCo-alloy graphite-coated nanoparticles with mean particle diameter under 8 nm have been synthesized following a CVD carbon-deficient method. The superior magnetic properties of FeCo-alloy nanoparticles makes them good candidates to be used as magnetic filler in magneto-polymer composites. Thanks to the protective effect of the graphite shell, FeCo nanoparticles are stable under oxygen atmosphere up to 200 ° C. The as-prepared nanoparticles presented a highly long range chemically ordered core being ferromagnetic at room temperature with a saturation magnetization at room temperature close to the bulk value. After annealing at 750 K the saturation magnetization and the coercive field increase. To investigate the processes involved in the thermal treatment, the temperature dependence of the magnetization and the particle composition, size and structure have been characterized before and after annealing. Besides powder x-ray diffraction (XRD) and x-ray photoelectron spectroscopy (XPS), a detailed study by means of advanced transmission electron microscopy (TEM) techniques has been carried out. In particular, aberration corrected scanning transmission electron microscopy (STEM), has shown that nanoparticles became faceted after the thermal treatment, as a mechanism to reach the thermodynamic equilibrium within the metastable phase. This outstanding feature, not previously reported, leads to an increase of the shape anisotropy, which in turn might be the origin of the observed increase of the coercive field after annealing.
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Affiliation(s)
- M Castrillón
- Technological Institute of Aragon (ITA), Maria de Luna 8, E-50018, Zaragoza, Spain
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Shokuhfar A, Seyyed Afghahi SS. The heating effect of iron-cobalt magnetic nanofluids in an alternating magnetic field: application in magnetic hyperthermia treatment. NANOSCALE RESEARCH LETTERS 2013; 8:540. [PMID: 24359163 PMCID: PMC3878128 DOI: 10.1186/1556-276x-8-540] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Accepted: 12/11/2013] [Indexed: 06/03/2023]
Abstract
In this research, FeCo alloy magnetic nanofluids were prepared by reducing iron(III) chloride hexahydrate and cobalt(II) sulfate heptahydrate with sodium borohydride in a water/CTAB/hexanol reverse micelle system for application in magnetic hyperthermia treatment. X-ray diffraction, electron microscopy, selected area electron diffraction, and energy-dispersive analysis indicate the formation of bcc-structured iron-cobalt alloy. Magnetic property assessment of nanoparticles reveals that some samples are single-domain superparamagnetic, while others are single- or multi-domain ferromagnetic. The stability of the magnetic fluids was achieved by using a CTAB/1-butanol surfactant bilayer. Results of Gouy magnetic susceptibility balance experiments indicate good stability of FeCo nanoparticles even after dilution. The inductive properties of corresponding magnetic fluids including temperature rise and specific absorption rate were determined. Results show that with increasing of the nanoparticle size in the single-domain size regime, the generated heat increases, indicating the significant effect of the hysteresis loss. Finally, the central parameter controlling the specific absorption rate of nanoparticles was introduced, the experimental results were compared with those of the Stoner-Wohlfarth model and linear response theory, and the best sample for magnetic hyperthermia treatment was specified.
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Affiliation(s)
- Ali Shokuhfar
- Advanced Materials and Nanotechnology Research Laboratory, Department of Materials Science and Engineering, K.N. Toosi University of Technology, P.O. Box 19395–1999, Tehran, Iran
| | - Seyyed Salman Seyyed Afghahi
- Advanced Materials and Nanotechnology Research Laboratory, Department of Materials Science and Engineering, K.N. Toosi University of Technology, P.O. Box 19395–1999, Tehran, Iran
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Facile synthesis of FeCo/Fe3O4 nanocomposite with high wave-absorbing properties. Int J Mol Sci 2013; 14:14204-13. [PMID: 23839091 PMCID: PMC3742239 DOI: 10.3390/ijms140714204] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Revised: 06/20/2013] [Accepted: 06/21/2013] [Indexed: 11/17/2022] Open
Abstract
The FeCo/Fe3O4 nanocomposite was synthesized using the hydrothermal approach, in which the FeCo alloy and Fe3O4 are formed by one step. The structure of the FeCo/Fe3O4 nanocomposite was characterized by means of Scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray energy-dispersive spectrometer spectroscopy (EDX). They show that the mass ratio of FeCo/Fe3O4 strongly depends on the reaction temperature. Such various architectures follow a stepwise growth mechanism of the composites prepared in various reaction temperatures were also discussed. It indicates that this strategy is facile, effective and controllable for the synthesis of FeCo/Fe3O4 by the one-step method. Furthermore, the magnetic and wave-absorbing properties of the nanocomposites with various structures were investigated in detail. The results show that the FeCo/Fe3O4 with higher mass ratio has higher magnetic properties. Moreover, the FeCo/Fe3O4 nanocomposite shows high wave-absorbing properties (e.g., −37.9 dB), which are expected to apply in microwave absorbing materials.
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Wu A, Yang X, Yang H. Magnetic properties of carbon-encapsulated Fe–Co alloy nanoparticles. Dalton Trans 2013; 42:4978-84. [DOI: 10.1039/c3dt32639j] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Li Y, Hu Y, Huo J, Jiang H, Li C, Huang G. Stable Core Shell Co3Fe7–CoFe2O4 Nanoparticles Synthesized via Flame Spray Pyrolysis Approach. Ind Eng Chem Res 2012. [DOI: 10.1021/ie3010644] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Yunfeng Li
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science & Technology, Shanghai 200237, China
| | - Yanjie Hu
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science & Technology, Shanghai 200237, China
| | - Junchao Huo
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science & Technology, Shanghai 200237, China
| | - Hao Jiang
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science & Technology, Shanghai 200237, China
| | - Chunzhong Li
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science & Technology, Shanghai 200237, China
| | - Guangjian Huang
- Department of Surgery, Huashan Hospital, Fudan University, Shanghai 200040, China
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Butovsky E, Irzh A, Markovsky B, Gedanken A. Synthesis of metal–carbon core–shell nanoparticles by RAPET (Reaction under Autogenic Pressure at Elevated Temperatures). NEW J CHEM 2012. [DOI: 10.1039/c1nj20627c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Butovsky E, Perelshtein I, Gedanken A. Air stable core–shell multilayer metallic nanoparticles synthesized by RAPET: fabrication, characterization and suggested applications. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm32528d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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