Synthesis and magnetic characterization of nanostructures N/WS2, where N=Ni, Co and Fe

Olivas, A.; Villalpando, Irma; Sepúlveda, Selene; Pérez, Oscar E.; Fuentes, S.

doi:10.1016/j.matlet.2007.01.100

Cited by 13 publications

(9 citation statements)

References 19 publications

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“…Since the introduction of the advantages of nanostructured cathode materials about transition metal chalcogenide has been reported and also due to their fundamental importance and technological utilities of the process and related materials such as magnetic materials [2], photoactive materials [3] and solid-state lubricants [4][5], hydrodesulfurization catalysts [6][7][8], many researchers have paid considerable attention to their preparation methods to control the morphologies of nanocrystalline and also insighted into their reaction mechanisms to better understand the requirements of active materials for batteries. And since nickel sulfides are known to be one of the most promising cathode materials for their high theoretical capacities [9], great efforts have also been made to explore new routes for its synthesis.…”

Section: Advantages and Synthesis Methods Of Metal Disulfidesmentioning

confidence: 99%

A study of Ni3S2 synthesized by mechanical alloying for Na/Ni3S2 cell

et al. 2011

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To synthesize nanocrystalline Ni 3 S 2 cathode material for Na/Ni 3 S 2 cell with low cost nickel and sulfur elements, mechanical alloying (MA) was employed directly and with different ball powder ratios (BPRs) of 20 ‫׃‬ 1, 25 ‫׃‬ 1 and 30 ‫׃‬ 1, the mean particle size of 3.99, 2.84 and 2.75 μm can be obtained, respectively. In order to ulteriorly reduce the particle size to improve the contact areas between the active materials, the wet ball milling with the normal Hexane (C 6 H 14 ) as the milling solvent was also conducted for 30 h using the ball milling machine, and the submicro Ni 3 S 2 powder particles can be gained. The charge/discharge properties of Na/Ni 3 S 2 cells for wet milled system were investigated at room temperature using 1 M NaCF 3 SO 3 (sodium trifluoromethanesulfonate) dissolved in TEGDME (tetra ethylene glycol dimethyl ether) as the liquid electrolyte. And the initial charge/discharge capacity was 397 and 425 mAh/g, respectively, which indicates the small particle size of cathode materials are conductive to the discharge properties.

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Section: Advantages and Synthesis Methods Of Metal Disulfidesmentioning

confidence: 99%

A study of Ni3S2 synthesized by mechanical alloying for Na/Ni3S2 cell

et al. 2011

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Section: Defect‐inducing Strategymentioning

confidence: 99%

“…Olivas et al. [ 31 ] studied the magnetism of Ni‐doped WS 2 . It can be observed from the M–H curve that the coercivity ( H c ) of the Ni‐doped WS 2 increases with the extension of the reduction time, showing soft ferromagnetism (Figure 4e).…”

Section: Defect‐inducing Strategymentioning

confidence: 99%

“…Thus, based on the Anderson-Goodenough-Kanamori rule, the preferred magnetic alignment for the two neighboring Ni atoms is antiferromagnetic. Olivas et al [31] studied the magnetism of Ni-doped WS 2 . It can be observed from the M-H curve that the coercivity (H c ) of the Ni-doped WS 2 increases with the extension of the reduction time, showing soft ferromagnetism (Figure 4e).…”

Section: Transition Metal Element Dopingmentioning

confidence: 99%

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Emerging Enhancement and Regulation Strategies for Ferromagnetic 2D Transition Metal Dichalcogenides

Yang,

Hu,

Yang

et al. 2023

Advanced Science

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Two‐dimensional transition metal dichalcogenides (2D TMDs) present promising applications in various fields such as electronics, optoelectronics, memory devices, batteries, superconductors, and hydrogen evolution reactions due to their regulable energy band structures and unique properties. For emerging spintronics applications, materials with excellent room‐temperature ferromagnetism are required. Although most transition metal compounds do not possess room‐temperature ferromagnetism on their own, they are widely modified by researchers using the emerging strategies to engineer or modulate their intrinsic properties. This paper reviews recent enhancement approaches to induce magnetism in 2D TMDs, mainly using doping, vacancy defects, composite of heterostructures, phase modulation, and adsorption, and also by electron irradiation induction, O plasma treatment, etc. On this basis, the produced effects of these methods for the introduction of magnetism into 2D TMDs are compressively summarized and constructively discussed. For perspective, research on magnetic doping techniques for 2D TMDs materials should be directed toward more reliable and efficient directions, such as exploring advanced design strategies to combine dilute magnetic semiconductors, antiferromagnetic semiconductors, and superconductors to develop new types of heterojunctions; and advancing experimentation strategies to fabricate the designed materials and enable their functionalities with simultaneously pursuing the upscalable growth methods for high‐quality monolayers to multilayers.

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“…Tungsten disulfide crystal has the advantages of a low coefficient of friction (COF), good heat resistance and oxidation resistance, strong bearing capacity, and compressive strength. It is one of the most popular new functional materials in China and abroad [1]. WS 2 nanoparticles have a multilayer structure and relatively weak adjacent lamellar interactions (via van der Waals forces), which has attracted widespread attention [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Study on Tribological Properties and Mechanisms of Different Morphology WS2 as Lubricant Additives

Zhang

Wang

et al. 2020

Materials

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In the present work, the relationship curve of the coefficient of friction (COF) with varying loads of different morphology WS2 lubricating additives in the friction process at various sliding speeds was studied. On this basis, wear marks and elements on the wear surfaces after friction were analyzed, and then the anti-wear and mechanism effects of WS2 of different forms in the lubrication process were discussed. Meanwhile, the Stribeck curve was used to study the lubrication state of the lubricating oil in the friction process. It was revealed that the COF of lubricating oil containing lamellar WS2 decreased by 29.35% at optimum condition and the minimum COF was concentrated at around 100 N. The COF of lubricating oil containing spherical WS2 decreased by 30.24% and the minimum coefficient was concentrated at 120 N. The extreme pressure property of spherical WS2 was better than that of lamellar WS2, and the wear resistance of spherical WS2 was more stable when the load was over 80 N. The different morphology of WS2 additives can play anti-wear and anti-friction roles within a wide range of sliding speeds.

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Synthesis and magnetic characterization of nanostructures N/WS2, where N=Ni, Co and Fe

Cited by 13 publications

References 19 publications

A study of Ni3S2 synthesized by mechanical alloying for Na/Ni3S2 cell

A study of Ni3S2 synthesized by mechanical alloying for Na/Ni3S2 cell

Emerging Enhancement and Regulation Strategies for Ferromagnetic 2D Transition Metal Dichalcogenides

Study on Tribological Properties and Mechanisms of Different Morphology WS2 as Lubricant Additives

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