Production of Iron Nanopowders by the Electric Explosion of Wire

Pustovalov, Alexey V.; Журавков, С. П.

doi:10.4028/www.scientific.net/amr.1097.3

Cited by 9 publications

(4 citation statements)

References 6 publications

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“…After validating the reliability of the ReaxFF force field for Al melting process, we study melting behaviors and energy characteristics of FNPs www.nature.com/scientificreports www.nature.com/scientificreports/ with different defect concentrations. In industry production, electrical explosion is one of the main methods to product FNPs in a large scale 31,32 . FNPs produced by this method are reported to be characterized by different defect concentrations.…”

Section: Effect Of Size Onmentioning

confidence: 99%

Molecular Dynamics Simulations of Melting Iron Nanoparticles with/without Defects Using a Reaxff Reactive Force Field

Sun

Liu

Wang

2020

Sci Rep

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Molecular dynamics simulations are performed to study thermal properties of bulk iron material and Fe nanoparticles (FNP) by using a ReaxFF reactive force field. Thermodynamic and energy properties such as radial distribution function, Lindemann index and potential energy plots are adopted to study the melting behaviors of FNPs from 300 K to 2500 K. A step-heating method is introduced to obtain equilibrium melting points. Our results show ReaxFF force field is able to detect size effect in FNP melting no matter in energy or structure evolution aspect. Extra storage energy of FNPs caused by defects (0%-10%) is firstly studied in this paper: defects will not affect the melting point of FNPs directly but increase the system energy especially when temperature reaches the melting points.

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Section: Effect Of Size Onmentioning

confidence: 99%

Molecular Dynamics Simulations of Melting Iron Nanoparticles with/without Defects Using a Reaxff Reactive Force Field

Sun

Liu

Wang

2020

Sci Rep

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“…Multiple types of nanomaterials have been prepared through PWD method, such as metal NPs, ,, metal compound nanomaterials, , alloy NPs, , nanocomposites, − and carbon nanomaterials. − Peng et al prepared copper NPs in the size range of 10–180 nm by pulsed discharge of copper wire. Gao et al prepared AlN nanopowders smaller than 10 nm by pulsed discharge of an Al wire in liquid nitrogen, also implying the potential on QDs preparation through PWD.…”

Section: Introductionmentioning

confidence: 99%

Formation of Blue-Emitting Colloidal Si Quantum Dots through Pulsed Discharge of Si Strips in Distilled Water Medium

et al. 2023

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Si quantum dots (QDs) have received quantities of attention owing to their multiple outstanding properties, such as the size-dependent optical property, photothermal property, electronic property, and biocompatible property. Therefore, researchers have been committed to exploring preparation methods of Si QDs. In this study, we have demonstrated a novel route to prepare Si QDs through a pulsed wire discharge method using Si strips. The as-prepared samples were recovered, centrifuged, and characterized by various techniques, such as XRD, Raman spectroscopy, SEM, TEM, FTIR, UV−vis absorption, and PL spectra. Consequently, the purified samples are confirmed to be pure Si QDs in a size of 1.4−4.7 nm, with an average particle size of 2.76−2.92 nm. Furthermore, the spectral analysis reveals the blue-emitting characteristics of the obtained Si QDs owing to the small particle size. Our studies demonstrate an efficient and cost-effective approach to produce colloidal Si QDs through pulsed wire discharge, which possesses potential for largescale production.

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“…Most studies have produced iron nanoparticles using chemical methods such as reduction of Fe(III) or Fe(II) with sodium borohydride in aqueous solutions, or through hydrogen reduction of iron oxides and vapour condensation involving hazardous chemicals, sophisticated equipment, and lab procedures . To date, electro‐physical methods, such as electrical wire explosion (EWE), have not been thoroughly investigated for preparing nZVIs, although these methods have been widely used for many years in solid‐state and plasma‐chemical physics, electronics, and optics .…”

Section: Introductionmentioning

confidence: 99%

“…In the second step, ultrafine powders are produced, followed by random dispersion of highly active nanoparticles amongst the heavy metal ions in the polluted water. Particle size is dependent upon the metal wire material, the discharge circuit, and the energy injected into the metal and surrounding environment . EWE is a simple, effective, and efficient method for producing pure weakly aggregated nanoparticles with a typical size of 5–100 nm .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Zero‐Valent Iron Nanoparticles Via Electrical Wire Explosion for Efficient Removal of Heavy Metals

Seyedi

Rabiee

Shahabadi

et al. 2017

CLEAN Soil Air Water

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In this paper, electrical wire explosion (EWE) was used as a simple, clean, in situ method to synthesise nano zero-valent iron (nZVI) particles in liquid mediums. The structural and physical properties of the synthesised nZVI particles were characterised by x-ray diffraction, Brunauer-Emmett-Teller analysis, field emission scanning electron microscopy and transmission electron microscopy. The synthesised spherical nanoparticles, at a specific size of 10-50 nm, possessed large surface areas of approximately 13.27 m 2 /g, reinforcing the significant advantages of EWE, that is, less aggregation and in situ production of nanoparticles with enhanced removal efficacy, for groundwater treatment. After 1 h the adsorption capacity for Cr(VI), Ni(II), and Cd(II) (Q 60 ¼ C ions /C iron (mg/g)) at pH 4 was approximately 143.4 (89.0%), 137.5 (79.0%), and 132.6 mg/g (72.0%), respectively. The effect of temperature was also examined at initial metal ions concentration of 70 mg/L, nZVI dosage of 0.2 g/L and pH 4. The results showed 45°C was the optimum temperature for adsorption of Cr(VI), Ni(II), and Cd(II) ions, and over a 60-min period at this temperature adsorption capacity increased to 153.56 (95.3%), 158.91 (91.3%), and 163.90 mg/g (89.0%), respectively.Abbreviations: BET, Brunauer-Emmett-Teller; EWE, electrical wire explosion; FE-SEM, field emission scanning electron microscopy; ICP-OES, inductively coupled plasma-optical emission spectrometry; nZVI, nano zero-valent iron; TEM, transmission electron microscopy; XPS, x-ray photoelectron spectroscopy; XRD, x-ray diffraction.

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Production of Iron Nanopowders by the Electric Explosion of Wire

Cited by 9 publications

References 6 publications

Molecular Dynamics Simulations of Melting Iron Nanoparticles with/without Defects Using a Reaxff Reactive Force Field

Molecular Dynamics Simulations of Melting Iron Nanoparticles with/without Defects Using a Reaxff Reactive Force Field

Formation of Blue-Emitting Colloidal Si Quantum Dots through Pulsed Discharge of Si Strips in Distilled Water Medium

Synthesis of Zero‐Valent Iron Nanoparticles Via Electrical Wire Explosion for Efficient Removal of Heavy Metals

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