Low‐temperature oxidation of metal nanoparticles obtained by chemical dispersion

Dzidziguri, É. L.; Сидорова, Е. Н.; Yahiyaeva, Jansaya E.; Ozherelkov, Dmitriy Yu.; Gromov, Alexander A.; Nalivaiko, Anton Yu.

doi:10.1049/mnl.2019.0706

Cited by 6 publications

(3 citation statements)

References 27 publications

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“…Nickel-based materials have gained great importance due to their catalytic, magnetic, and biological properties. Nickel nanoparticles can be produced by various methods such as these: Sol-gel, microemulsion, polyol, hydrazine-based reduction, laser ablation, and ultrasound-based reduction [31][32][33][34][35]. Despite the reality that the fabrication of magnetic metallic nickel nanostructure materials is economical and solely requires basic equipment, these procedures are challenging because of their oxidation and instability.…”

Section: Discussionmentioning

confidence: 99%

One Pot Synthesis, Surface, and Magnetic Properties of Ni–NiO@C Nanocomposites

Al-Senani,

Al-Fawzan,

Alshabanat

et al. 2023

Crystals

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An entirely novel and creative technique was employed for producing magnetic Ni–NiO@C nanocomposites, and it was based on the utilization different amounts of finely ground and fully dried olive leaf powders. The resulting nanocomposites were identified and characterized by XRD, FTIR, SEM, EDS, TEM, and Raman techniques. The magnetic and surface characteristics of the composites, as it developed, were further evaluated using the Vibrating-Sample Magnetometer (VSM) and Brunauer–Emmett–Teller (BET) techniques. The results confirmed the success of preparing a Ni–NiO@C nanocomposites, each containing Ni and NiO in crystalline form. Through the morphology of the resulting composites, determined on the basis of an SEM analysis, it became clear to us that the particles were of a semi-spherical shape, with a clear grouping and a definition of their grain boundaries. Comparably, a TEM investigation demonstrated that the composites had a core–shell structure. The surface area of the investigated composites increases as the content of dried olive leaf powders increases due to a significant increase in the total pore volume. These composites illustrated low magnetism (4.874 and 8.648 emu/g) and coercivity (55.203 and 39.639 Oe) for a number of reasons, which will be explained.

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Section: Discussionmentioning

confidence: 99%

One Pot Synthesis, Surface, and Magnetic Properties of Ni–NiO@C Nanocomposites

Al-Senani,

Al-Fawzan,

Alshabanat

et al. 2023

Crystals

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“…XRF is often used for qualitative and quantitative elemental analysis of heterogeneous samples in many fields of science and technology [8][9][10]. This method mainly analyzes metals; hence, elements emitting X-rays below 1 keV (B, C, N, O) cannot be analyzed by XRF.…”

Section: Introductionmentioning

confidence: 99%

X-ray Fluorescence Spectroscopy Features of Micro- and Nanoscale Copper and Nickel Particle Compositions

et al. 2021

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The study is devoted to X-ray fluorescence spectroscopy (XRF) features of micro- and nanosized powder mixtures of copper and nickel. XRF is a high accuracy method that allows for both qualitative and quantitative analysis. However, the XRF measurement error due to the size of the studied particles is not usually taken into account, which limits the use of the method in some cases, such as analysis of Ni-Cu mixtures and coatings. In this paper, a method for obtaining copper and nickel nanoparticles was investigated, and the XRF of powder compositions was considered in detail. The initial micro- and nanoparticles of copper and nickel were studied in detail using SEM, TEM, XRD, and EDX. Based on experimental data, calibration curves for copper-nickel powder compositions of various sizes were developed. According to the results, it was experimentally established that the calibration curves constructed for nanoscale and microscale powders differ significantly. The presented approach can be expanded for other metals and particle sizes.

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“…Nickel-based nanoscale powders have attracted the interest of researchers due to their good catalytic, magnetic, and tribological properties [ 7 , 8 , 9 , 10 ]. They are used as additives in motor oils, in storage systems, in magnetic cooling systems, in catalysis [ 11 , 12 , 13 ], and as permanent magnets [ 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Metal Nanoparticles Formation from Nickel Hydroxide

et al. 2020

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In this study, the mechanism of nickel nanoparticle formation from its hydroxide was analyzed. Metallic nickel nanoparticles were obtained through the hydroxide’s reduction under hydrogen. Nickel hydroxides were produced from nickel (II) nitrate hexahydrate and NaOH by deposition under various initial conditions. The influence of washing treatment on the dispersion of obtained nickel powders was studied. The washing procedure of precipitates was carried out by centrifugation, ultrasonic treatment, and decantation. X-ray diffractometry, transmission electron microscopy, low-temperature nitrogen adsorption, infrared spectroscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy methods were used for nanoparticle characterization. Based on the resulting data, a model of the Ni(OH)2 aggregate structure after deposition was proposed. The number of nickel hydroxide particles required to form one nickel nanoparticle was estimated, and a model of its formation was proposed.

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Low‐temperature oxidation of metal nanoparticles obtained by chemical dispersion

Cited by 6 publications

References 27 publications

One Pot Synthesis, Surface, and Magnetic Properties of Ni–NiO@C Nanocomposites

One Pot Synthesis, Surface, and Magnetic Properties of Ni–NiO@C Nanocomposites

X-ray Fluorescence Spectroscopy Features of Micro- and Nanoscale Copper and Nickel Particle Compositions

Metal Nanoparticles Formation from Nickel Hydroxide

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