tungsten carbide nanoparticles

The study investigated the performance of CoCrFeMnNi high entropy alloy and tungsten carbide–nickel coatings under alumina particle impingement. The coatings were applied to 2205 duplex stainless steel substrates by cold spray using nitrogen. For the composite coatings, the amount of WC nanoparticles entrapped in the Ni matrix was …

Ostermann M. Production of very fine grained tungsten and tungsten carbide powders with the transport reaction of WO 2 (OH) 2. Diploma Thesis, Wien; 2019. Zavodinsky VG. Small tungsten carbide nanoparticles: simulation of structure, energetics, and tensile strength. Int J Refract Metal Hard Mater. 2010;28(3):446.

Hybrid tungsten composites reinforced with zirconium carbide (ZrC) nanoparticles and tungsten fibers were developed by the conventional powder metallurgy process (ball-mill mixing of powders and fibers followed by spark plasma sintering). The synergistic and mutual influences of the fibers and nanoparticles on tungsten were …

Metallic tungsten carbide nanoparticles as a near-infrared-driven photocatalyst. Search articles by author. Employing near infrared (NIR) light for photocatalytic reactions is preferable, considering effective …

These tungsten carbides are successful cocatalysts for overall water splitting and give H (2) and O (2) in a stoichiometric ratio from H (2)O decomposition when supported on a Na-doped SrTiO (3) photocatalyst. Herein, we present tungsten carbide (on a small scale) as a promising and durable catalyst substitute for platinum and other scarce ...

Pure tungsten carbide nanoparticles are considered to be non-toxic and non-carcinogenic. Material Information. Properties and Applications. Tungsten carbide (WC) is an inorganic non-natural compound composed of tungsten (W) and carbon (C). Mono-tungsten carbide (WC), which is stable at room temperature, is of major technical …

We designed earth-abundant, carbon-supported titanium tungsten carbide (Ti x W 1−x C) nanoparticles decorated with surface Pt coatings ranging from the "single-atom" to the two-monolayer regime. Reactivity studies demonstrated that sub-monolayer Pt coverages are optimal and could activate the exposed metal carbide sites for both HER …

In this study, different contents of tantalum carbide (TaC) nanoparticles doped in tungsten powders were synthesized via the proposed wet chemical process. However, preparing the bulk W from nanoparticles and preserving the nanosized structure are difficult to accomplish using this method. Such difficulties are attributed to the …

The low temperature transformation pathways of tungsten carbide formation in the nanoscale regime were investigated using a reactive carbon molecule and tungsten. WC core/W shell nanoparticles produced by the decomposition of metastable W2C were discovered using TEM. XRD studies revealed both the elemental and carbide …

However, the results show that nanoparticles of pure tungsten carbide do not have any cytotoxic effects. These are only produced when the nanoparticles are mixed with toxic substances such as cobalt. In the in vitro study, which has been published in the well-respected journal Environmental Health Perspectives, the researchers investigated …

Tungsten carbide (WC) is a widely used engineering material which is usually prepared at high temperature. A new mechanism for synthesizing nanoscaled …

Herein, we obtain a series of tungsten carbide/carbon composites through a simple solvent-free strategy, where the solid mixture of dicyandiamide (DCA) and ammonium metatungstate (AM) is employed as the precursor. Ultrafine cubic WC 1-x nanoparticles (3-4 nm) are in situ generated and uniformly dispersed on carbon nanosheets. This …

Carbon-supported tungsten carbide (WC) and molybdenum tungsten carbide (Mo(x)W(1-x)C) nanoparticles are highly active and stable electrocatalysts. Specifically, activities and capacitances about 100-fold higher than commercial WC and within an order of magnitude of platinum-based catalysts are achieved for the hydrogen …

Fig.3 FESEM image of tungsten carbide nanoparticles generated in EDM oil dielectric at duty factor of 0.5μs at a) 20V, b) 30V c) 40V Voltage. 1196 H. N. S. Yadav/ Materials Today: Proceedings 18 (2019) 1192â€"1197 Fig.4 FESEM image of tungsten carbide nanoparticles generated in Kerosene oil at duty factor of 0.5μs at a) 20V, b) …

Supported tungsten carbide is an efficient and vital nanomaterial for the development of high-performance, sensitive, and selective electrochemical sensors. In this work, tungsten carbide with tube-like nanostructures (WC NTs) supported platinum nanoparticles (PtNPs) are synthesized and explored as …

Carbon-supported tungsten carbide (WC) and molybdenum tungsten carbide (MoxW1−xC) nanoparticles are highly active and stable electrocatalysts. Specifically, activities and capacitances about 100 ...

Background: Tungsten carbide (WC) and tungsten carbide cobalt (WC-Co) nanoparticles are of occupational health relevance because of the increasing usage in hard metal industries. Earlier studies showed an enhanced toxic potential for WC-Co compared to WC or cobalt ions alone. Therefore, we investigated the impact of these …

Herein, tungsten carbide (WC) hollow spheres with a surface area of 396.3 m² g⁻¹ were successfully fabricated, and used to support CdS nanoparticles (~5 nm) to form a noble-metal-free CdS/WC ...

These nanoparticles should be stored under cool, dry, vacuum conditions and should not be subjected to any stress. Tungsten is a Block D, Period 6 element and carbon is a Block P, Period 2 element. Chemical Properties. The chemical properties of Tungsten carbide nanoparticles are as per the table below.

Efficient tungsten carbide (W 2 C) nanoparticles were successfully prepared via a facile chemical reduction method. Structural confirmation studies were performed using spectroscopy and microscopy studies. The drop-casted W 2 C nanoparticles on glassy carbon electrode (GCE) used for the fabrication of molecularly …

To develop nanoparticles for broad applications, potential risks to human health and the environment should be evaluated and taken into consideration. Objective: We aimed to assess the toxicity of well-characterized tungsten carbide (WC) and cobalt-doped tungsten carbide (WC-Co) nanoparticle suspensions in an array of mammalian cells.

Tungsten carbide nanoparticles (NPs) were synthesized by wire explosion process (WEP) in gas ambient as carbon source. Formation of tungsten carbide (WC 1− X) in a single step by WEP using methane and argon-acetylene mixture as carburizing medium, is detailed.X-ray diffraction (XRD), scanning electron microscopy (SEM), and …

A method is presented for the production of metal-terminated TMC nanoparticles in the 1–4 nm range with tunable size, composition, and crystal phase. Carbon-supported tungsten carbide (WC) and molybdenum tungsten carbide (Mo x W 1−x C) nanoparticles are highly active and stable electrocatalysts. Specifically, activities …

Herein, the metalloid of tungsten carbide (WC) was used as an NIR-driven photocatalyst for the photodegradation of organic pollutants for the first time. The noble metal-like electronic properties of WC were proven via the analysis of its electronic occupied state using ultraviolet photoelectron spectroscopy and valence band XPS.

Xu, Y.-T. et al. Cage-confinement pyrolysis route to ultrasmall tungsten carbide nanoparticles for efficient electrocatalytic hydrogen evolution. J. Am. Chem. Soc. 139, 5285–5288 (2017).

–Studies of tungsten-carbide nanoparticles synthesized from tungsten oxide are carried out using different precursors in low-temperature plasma generated using vacuum-arc discharge. The phase content, structural features and size distribution in tungsten-carbide nanoparticles are explored using powder diffractrometry, Raman …

@article{Zhang2020InST, title={In situ-grown tungsten carbide nanoparticles on nanocarbon as an electrocatalyst to promote the redox reaction kinetics of high-mass loading sulfur cathode for high volumetric performance}, author={Jing Zhang and Shaorong Duan and Caiyin You and Jian Wang and Haitao Liu and Shaohua Guo …

Tungsten carbide electrocatalysts prepared from metallic tungsten nanoparticles for efficient hydrogen evolution Appl Catal, B, 236 ( 2018 ), pp. 147 - 153 View PDF View article View in Scopus Google Scholar

This paper describes a method for synthesis of pure, fine WC powder at temperature as low as 1000 °C. The method consists of simple thermal treatment of a mixture of tungsten powder and viscose rayon cloth. According to the author׳s knowledge, viscose rayon cloth was used as a carbon source for the first time. The effects of the …

The tungsten carbide nanoparticles were characterized for physicochemical properties by multiple morphological and structural methods (e.g. SEM, TEM, and XRD). Characterization results revealed that the transformation of tungsten oxide (WO 3) to tungsten carbide nanoparticles involved the following sequence steps: WO 3 → WO 2 → W → W 2 C ...

To prepare tungsten carbide (WC) nanoparticles high purity precursors like W, WO3, WCl4, WCl6 and W(CO)6 are used. Moreover, these precursors are obtained after high temperature and multistage ...

The tungsten carbide nanoparticles were characterized for physicochemical properties by multiple morphological and structural methods (e.g. SEM, TEM, and XRD). Characterization results revealed that the transformation of tungsten oxide (WO 3) to tungsten carbide nanoparticles involved the following sequence steps: WO 3 → WO 2 → W → W 2 C →

To assess their antibacterial activity, Matharu et al. investigated the effects of tungsten, tungsten carbide, and tungsten oxide nanoparticles on E. coli, Staphylococcus aureus, and bacteriophage T4 (a DNA virus) . The most effective nanoparticles, tungsten oxide, were characterized using scanning electron microscopy …

Ultrafine cubic tungsten carbide nanoparticles in situ formed during high-temperature pyrolysis are homogeneously dispersed …

Keywords: tungsten-carbide nanoparticles, tungsten-oxide nanopowder, glucose, carbon black, vacuum- electric-arc discharge, X-ray spectral analysis, Raman spectroscopy DOI: 10. 1 1 34/S1027 451 ...

Abstract. Tungsten carbide (WC) nanoparticles were synthesized by carbothermal reduction (CR) of tungsten-promoted biochar. The tungsten carbide nanoparticles were characterized for physicochemical …

Herein, we obtain a series of tungsten carbide/carbon composites through a simple solvent-free strategy, where the solid mixture of dicyandiamide (DCA) and ammonium metatungstate (AM) is employed as the precursor. Ultrafine cubic WC 1-x nanoparticles (3-4 nm) are in situ generated and uniformly dispersed on carbon …

Iron carbide, tungsten carbide, and vanadium carbide are found to have good catalytic activity. Nitrogen-doped graphene was found good support as well as a catalyst for oxygen reduction reactions. FeMo carbide supported on graphene was synthesized by nanoparticle growth on graphene oxide and then pyrolysis by urea was …

X-Ray Phase Analysis of Tungsten-Carbide Nanoparticles Synthesized Using the Vacuum-Arc Technique. Published: 03 August 2022. Volume 16, pages …