Elaboration, characterization and magnetic properties of cobalt nanoparticles synthesized by ultrasonic spray pyrolysis followed by hydrogen reduction

Shatrova, Nadezda; Yudin, A. G.; Levina, V. V.; Dzidziguri, É. L.; Кузнецов, Денис; Перов, Н.С.; Issi, J.‐P.

doi:10.1016/j.materresbull.2016.10.010

Cited by 30 publications

(22 citation statements)

References 42 publications

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“…It showed that reducing Co(NO 3 ) 2 concentration from 0.08 to 0.04 mol•L −1 , decreased the mean size of NPs from 596 to 480 nm. Later, Shatrova et al [74] performed a two-step USP process to make CoNPs. First, Co 3 O 4 nanostructured microspheres were synthesized by USP, which were subsequently reduced to metal cobalt in a hydrogen atmosphere.…”

Section: Pure Cobalt Nanoparticlesmentioning

confidence: 99%

Synthesis of cobalt, palladium, and rhenium nanoparticles

2020

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Over the past decade, metal nanoparticles (MNPs) have attracted extensive attention due to their unique physiochemical properties that make them highly applicable in various fields such as chemical sensing, energy storage, catalysis, medicine, and environmental engineering. Their physiochemical properties depend drastically on the MNP size and morphology, which are largely determined by their synthesis methods. Research on MNPs predominantly focused on coinage metals (Au, Ag and Cu), but in the last decade research on metals with a relatively high melting temperature such as Pd, Co, and Re has seen rapid increases, mainly driven by their potential applications as catalysts. This paper presents the recent advances on different synthesis techniques of Co, Pd, and Re nanoparticles, their resulting nanostructures, as well as existing and potential applications.

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Section: Pure Cobalt Nanoparticlesmentioning

confidence: 99%

Synthesis of cobalt, palladium, and rhenium nanoparticles

2020

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“…Particularly, chemically prepared CoPt NPs exhibits excellent magnetic properties and catalytic activities [12,13] when the size reduced below 10 nm. The formation of cobalt oxide (CoO, Co2O3, or Co3O4) on CoPt nanoparticles provides a chemical and thermal stability of magnetic application as well as in Li-ion batteries, optical devices, catalysts, gas and humidity sensors properties [14][15][16]. There are several methods which result in high-quality cobalt oxide formation on clusters by polyol process, solgel method, thermal composition, etc.…”

Section: Introductionmentioning

confidence: 99%

Comparing Different Approaches to Form Cobalt Oxide Layer on CoPt Nanoparticles

Kaya

Adanur

Akyol

et al. 2020

Adıyaman University Journal of Science

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We have studied the effect of preparation methods, under argon gas and in the air environment, on the cobalt oxide formation of CoPt nanoparticles by the polyol process. The formation of cobalt oxide for both samples was investigated by the x-ray diffraction (XRD) method and cobalt oxide peaks are observed in the air prepared sample. Rietveld refinement analyses revealed that all samples exhibit a chemically distorted cubic crystal structure. The average particle size was determined <8 nm by scanning electron microscopy (SEM) and energydispersive x-ray spectroscopy (EDS) was revealed the chemical compositions with possible oxygen formation in the structure. The blocking temperature is reduced to 28 K in the air prepared sample due to cobalt oxide formation. The hysteresis gap disappeared above the blocking temperature and no saturation is observed up to ±5 T external field due to the system switching

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Section: Introductionmentioning

confidence: 99%

“…The chemical composition, crystal structure and the degree of its defectiveness, morphology, and the interaction of particles with the surrounding matrix and neighboring particles play crucial role [12,13]. It is possible to control the magnetic characteristics of materials by changing the morphology of such nanoparticles [12]. Among numerous magnetic nanomaterials, cobalt (Co) and its oxides based nanoparticles have attracted particular attention because of their excellent optical [14,15], magnetic [12,13,16], and catalytic properties [17,18].…”

Section: Introductionmentioning

confidence: 99%

“…It is possible to control the magnetic characteristics of materials by changing the morphology of such nanoparticles [12]. Among numerous magnetic nanomaterials, cobalt (Co) and its oxides based nanoparticles have attracted particular attention because of their excellent optical [14,15], magnetic [12,13,16], and catalytic properties [17,18]. For the synthesis of such compounds, the most common methods are solvent-thermal [19][20][21], thermolysis of the carbonyl [22] or other cobalt complexes [23], and chemical reduction of cobalt salts [24,25].…”

Section: Introductionmentioning

confidence: 99%

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Magnetic Cobalt and Cobalt Oxide Nanoparticles in Hyperbranched Polyester Polyol Matrix

Медведева

Kambulova

Bondar

et al. 2017

Journal of Nanotechnology

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A series of cobalt (Co) and its oxides based nanoparticles were synthesized by using hyperbranched polyester polyol Boltorn H20 as a platform and sodium borohydride as a reducing agent. UV, FT-IR, XRD, NTA, and TEM methods were employed to obtain physicochemical characteristics of the products. The average diameter of Co nanoparticles was approximately 8.2 ± 3.4 nm. Their magnetic properties, including hysteresis loop, field-cooled, and zero field-cooled curves were investigated. The nanoparticles exhibit superparamagnetism at room temperature, accompanied by magnetic hysteresis below the blocking temperature.

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Elaboration, characterization and magnetic properties of cobalt nanoparticles synthesized by ultrasonic spray pyrolysis followed by hydrogen reduction

Cited by 30 publications

References 42 publications

Synthesis of cobalt, palladium, and rhenium nanoparticles

Synthesis of cobalt, palladium, and rhenium nanoparticles

Comparing Different Approaches to Form Cobalt Oxide Layer on CoPt Nanoparticles

Magnetic Cobalt and Cobalt Oxide Nanoparticles in Hyperbranched Polyester Polyol Matrix

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