Synthesis of metastable cubic tungsten carbides by electrical explosion of tungsten wire in liquid paraffin

Tanaka, Shigeru; Батаев, И. А.; Oda, Hayato; Hokamoto, Kazuyuki

doi:10.1016/j.apt.2018.06.025

Cited by 37 publications

(5 citation statements)

References 38 publications

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“…From the XRD pattern of carbon-WC, a very broad peak at 2θ = 25 • suggested the amorphous state of carbon-WC. However, the peaks at 2θ = 36.7 • , 42.6 • , 61.8 • , 74.1 • and 78.0 • , corresponding to the (111), ( 200), ( 220), (311) and (222) planes of metastable tungsten carbide (WC 1−x ), were also observed in the XRD pattern of carbon-WC [33,63]. Furthermore, a peak at 2θ = 38.5 • corresponding to the (110) plane of tungsten metal appeared at a very low intensity.…”

Section: Characterization Of Carbon-wc and Carbon-wc-ag Nanoparticlesmentioning

confidence: 98%

Plasma-Assisted Synthesis of Multicomponent Nanoparticles Containing Carbon, Tungsten Carbide and Silver as Multifunctional Filler for Polylactic Acid Composite Films

2021

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Multicomponent nanoparticles containing carbon, tungsten carbide and silver (carbon-WC-Ag nanoparticles) were simply synthesized via in-liquid electrical discharge plasma, the so-called solution plasma process, by using tungsten electrodes immersed in palm oil containing droplets of AgNO3 solution as carbon and silver precursors, respectively. The atomic ratio of carbon:W:Ag in carbon-WC-Ag nanoparticles was 20:1:3. FE-SEM images revealed that the synthesized carbon-WC-Ag nanoparticles with particle sizes in the range of 20–400 nm had a spherical shape with a bumpy surface. TEM images of carbon-WC-Ag nanoparticles showed that tungsten carbide nanoparticles (WCNPs) and silver nanoparticles (AgNPs) with average particle sizes of 3.46 nm and 72.74 nm, respectively, were dispersed in amorphous carbon. The carbon-WC-Ag nanoparticles were used as multifunctional fillers for the preparation of polylactic acid (PLA) composite films, i.e., PLA/carbon-WC-Ag, by solution casting. Interestingly, the coexistence of WCNPs and AgNPs in carbon-WC-Ag nanoparticles provided a benefit for the co-nucleation ability of WCNPs and AgNPs, resulting in enhanced crystallization of PLA, as evidenced by the reduction in the cold crystallization temperature of PLA. At the low content of 1.23 wt% carbon-WC-Ag nanoparticles, the Young’s modulus and tensile strength of PLA/carbon-WC-Ag composite films were increased to 25.12% and 46.08%, respectively. Moreover, the PLA/carbon-WC-Ag composite films possessed antibacterial activities.

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Section: Characterization Of Carbon-wc and Carbon-wc-ag Nanoparticlesmentioning

confidence: 98%

Plasma-Assisted Synthesis of Multicomponent Nanoparticles Containing Carbon, Tungsten Carbide and Silver as Multifunctional Filler for Polylactic Acid Composite Films

2021

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“…Wada et al [42,43] obtained TiO 2 and TiN nanopowders using the pulsed discharge of Ti wire in air and liquid nitrogen, respectively. Tanaka et al [44] have recovered tungsten carbide nanoparticles after the pulsed discharge to tungsten wire in liquid paraffin. He et al [45] synthesized boron nitride nanosheet/nanotube-Fe nanocomposite via pulsed discharge of iron wire coated by boron nitride powder.…”

Section: Introductionmentioning

confidence: 99%

High-Efficiency Production of Large-Size Few-Layer Graphene Platelets via Pulsed Discharge of Graphite Strips

et al. 2019

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The synthesis of large-size graphene materials is still a central focus of research into additional potential applications in various areas. In this study, large-size graphene platelets were successfully produced by pulsed discharge of loose graphite strips with a dimension of 2 mm × 0.5 mm × 80 mm in distilled water. The graphite strips were made by pressing and cutting well-oriented expanded graphite paper. The recovered samples were characterized by various techniques, including TEM, SEM, optical microscopy (OM), atomic force microscopy (AFM), XRD and Raman spectroscopy. Highly crystalline graphene platelets with a lateral dimension of 100–200 μm were identified. The high yield of recovered graphene platelets is in a range of 90–95%. The results also indicate that increasing charging voltage improves the yield of graphene platelets and decreases the number of graphitic layers in produced graphene platelets. The formation mechanism of graphene platelets was discussed. This study provides a one-step cost-effective route to prepare highly crystalline graphene platelets with a sub-millimeter lateral size.

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“…Many alternative processes for producing ultrafine WC powders, including solvothermal approach, [87][88] combustion synthesis, [89][90] wire explosion, [91][92] and thermochemical processing, [93] have been developed with varied degrees of success. Furthermore, the powders of tungsten carbide could be manufactured through chemical vapor-phase synthesis (CVS).…”

Section: Preparation Approaches Of Pure Phase Wcmentioning

confidence: 99%

Tungsten Carbide‐Based Materials for Electrocatalytic Water Splitting: A Review

Rafique,

Fu,

Han

et al. 2024

ChemElectroChem

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Hydrogen has garnered considerable attention as an environmentally friendly due to its sustainability and exceptional energy density, surpassing other chemical fuels. For H2 production, electrochemical water splitting is an economically viable and eco‐friendly method. Developing well‐organized electrocatalysts for electrochemical water splitting is pivotal in enabling long‐term hydrogen production, the critical component in the transition toward a cleaner and more environmentally sustainable energy landscape. During the last decades, to aid in oxygen evolution and hydrogen evolution reactions, numerous tungsten carbide‐based electrocatalysts have been established. WC developed as a promising candidate for electrolytic hydrogen generation. This review first explores the historical background and fundamental mechanisms underlying water splitting and subsequently investigates the field of WC‐based electrocatalysts. Furthermore, in both HER and OER, the thorough analysis examines the electrocatalytic performance of electrocatalysts based on WC. Finally, it discusses the challenges and prospects of developing WC‐based electrocatalysts for OER and HER, shedding light on their potential contributions to the sustainable energy landscape.

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Synthesis of metastable cubic tungsten carbides by electrical explosion of tungsten wire in liquid paraffin

Cited by 37 publications

References 38 publications

Plasma-Assisted Synthesis of Multicomponent Nanoparticles Containing Carbon, Tungsten Carbide and Silver as Multifunctional Filler for Polylactic Acid Composite Films

Plasma-Assisted Synthesis of Multicomponent Nanoparticles Containing Carbon, Tungsten Carbide and Silver as Multifunctional Filler for Polylactic Acid Composite Films

High-Efficiency Production of Large-Size Few-Layer Graphene Platelets via Pulsed Discharge of Graphite Strips

Tungsten Carbide‐Based Materials for Electrocatalytic Water Splitting: A Review

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