Synthesis of platinum embedded in amorphous carbon by micro-gap discharge in heptane

Hamdan, Ahmad; Noël, Cédric; Ghanbaja, Jaâfar; Migot-Choux, Sylvie; Belmonte, T.

doi:10.1016/j.matchemphys.2013.07.006

Cited by 26 publications

(29 citation statements)

References 46 publications

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“…This third population is low in density and due to droplet expulsion from the liquid well that forms when the electrode is struck by the discharge and not by gas phase condensation, unlike the two other populations). [ 26 ] The formation of a shockwave at the very beginning of the discharge ignition blasts nanoparticles out of the interelectrode gap, leading to optical emission lines that only belong to the electrode metal. [ 27 ] If nanoparticles of a given type (e.g., cobalt) are present in liquid nitrogen before discharges between two electrodes made of another metal (nickel), only emission lines of this second metal (nickel) will be observed during discharges. Gauzes of specific metals like zinc, silver, or bismuth may also form (together with nanoparticles) by a previously unknown mechanism.…”

Section: Resultsmentioning

confidence: 99%

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Evidence of alloy formation in CoNi nanoparticles synthesized by nanosecond‐pulsed discharges in liquid nitrogen

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Nominé

Noël

et al. 2020

Plasma Processes & Polymers

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Producing alloy nanoparticles by discharge-assisted erosion of electrodes immersed in liquid nitrogen is possible in the cobalt-nickel system. Several electrode configurations are tested. When one nickel electrode faces one cobalt electrode, Co x Ni 1−x alloy nanoparticles are produced with nickel cubic nanoparticles and cobalt round-shaped faceted nanoparticles. The possibility of forming alloys is attributed to a sufficiently long residence time of both parent clusters within the discharge and to their total miscibility. It is also possible to form submi-

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Evidence of alloy formation in CoNi nanoparticles synthesized by nanosecond‐pulsed discharges in liquid nitrogen

Trad

Nominé

Noël

et al. 2020

Plasma Processes & Polymers

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“…Plasmas in-or in-contact with a liquid medium constitute a novel field of research that presents great potential for numerous applications, such as material processing [1]- [3], wastewater treatment [4], agricultural engineering [5]- [7], medical treatment [8]- [10], and others. To date, various plasma sources have been designed, developed, and studied for liquid processing.…”

Section: Introductionmentioning

confidence: 99%

Microwave Plasma Jet in Water: Effect of Water Electrical Conductivity on Plasma Characteristics

Hamdan

Profili

Suk

2019

Plasma Chem Plasma Process

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Plasma-induced water treatment is a novel water treatment technique that has shown high efficiency and flexibility. Although the electrical conductivity of impure water varies depending on the degree of pollution, its influence on plasma treatment efficiency is not well understood. In this study, we investigate the fundamentals of a microwave plasma jet submerged in water with electrical conductivities (σw) ranging from 10 to 10000 µS/cm. The plasma characteristics, namely composition, electron density, and temperature, and their variations as a function of σw, are derived using optical emission spectroscopy. The plasmabubble dynamics is investigated using space-and time-resolved high-speed imaging. The results show that the plasma fills the bubble volume at relatively low flow rate (typically, < 2 L/min) and high σw (typically, > 1000 µS/cm). The influence of σw on the degradation of methylene blue, a standard water pollutant, is also assessed, and the obtained results indicate that the plasma becomes extremely inefficient at high σw. These findings are of great importance for the community of plasma-induced liquid processing, particularly wastewater treatment.

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“…Various in‐liquid plasma‐based techniques to synthesize nanomaterials have been proposed, including plasma‐induced electrode erosion and plasma‐induced liquid dissociation . In plasma‐induced electrode erosion, two metallic electrodes are immersed in a dielectric liquid and the applied electrical potential difference between the electrodes generates electrical discharge.…”

Section: Introductionmentioning

confidence: 99%

“…However, impurities resulting from electrode erosion during dissociation can be a problem. The rate of erosion must be minimized . Because the dissociation of the dielectric liquid and the erosion of the electrode occur simultaneously, the resulting materials can be either multiphasic (alloys) or nanocomposites (nanoparticles embedded in a matrix).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of SiOC:H nanoparticles by electrical discharge in hexamethyldisilazane and water

Hamdan

AbdulHalim

Anjum

et al. 2017

Plasma Processes & Polymers

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Nanoparticles have unique properties and are useful in many applications. Efficient synthesis of high yields of nanoparticles remains a challenge. Here, we synthesized SiOC:H, a low‐dielectric‐constant material, by electrical discharge at the interface of hexamethyldisilazane and water. The nanoparticle production rate of our technique was ∼17 mg per minute. We used Fourier transform infrared spectroscopy, scanning and transmission electron microscopy, and X‐ray photoemission spectroscopy to characterize the synthesized material. Heating the nanoparticles to 500 °C for 2 h released hydrogen from CHx groups and evaporated volatile compounds. Our method to produce high yields of low‐dielectric‐constant nanoparticles for microelectronic applications is promising.

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Synthesis of platinum embedded in amorphous carbon by micro-gap discharge in heptane

Cited by 26 publications

References 46 publications

Evidence of alloy formation in CoNi nanoparticles synthesized by nanosecond‐pulsed discharges in liquid nitrogen

Evidence of alloy formation in CoNi nanoparticles synthesized by nanosecond‐pulsed discharges in liquid nitrogen

Microwave Plasma Jet in Water: Effect of Water Electrical Conductivity on Plasma Characteristics

Synthesis of SiOC:H nanoparticles by electrical discharge in hexamethyldisilazane and water

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