Rapid Formation of Diamond-Like Nano-Carbons in a Gas Bubble Discharge in Liquid Ethanol

Chen, Zhiqiang; Magniez, Kevin; Duchemin, M. Jean‐Pascal; Stanford, Nicole; Ambujakshan, Arun T.; Taylor, Alex; Wong, Cynthia S.; Zhao, Yan; Dai, Xiujuan J.

doi:10.1007/s11090-017-9843-5

Cited by 9 publications

(5 citation statements)

References 37 publications

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“…21−23 Using this approach, recently, we were able to produce nanodiamonds by dissociation of ethanol in its liquid state. 21 In this paper, we demonstrate that the SiOC NPs with a crystalline phase can be formed by the use of the gas bubble discharge-in-liquid technique.…”

Section: ■ Introductionmentioning

confidence: 84%

“…Here, we develop a simple, green, super-rapid, and scalable approach to process SiOC NPs at atmospheric pressure near the ambient temperature using a gas bubble discharge in hexamethyldisiloxane (HMDSO) (Figure a), where up to 90 mg of SiOC NPs can be produced in 30 s. The liquid precursor can be fully recycled and reused in this process as the FTIR spectra show that the chemical structure of HMDSO was unchanged before and after plasma treatment (Figure S1, Supporting Information). This novel approach in the engineering of nanomaterials is based on the direct interaction of highly nonequilibrium gas-phase plasma with a liquid medium through a plasma/liquid interface. , Such a unique combination of different states of matter provides an opportunity to realize the variety of physical and chemical processes that are not achievable by conventional techniques. Compared to the direct discharge in a liquid, sustaining the electrical discharge inside gas bubbles in a liquid reduces the energy input to produce reactive species and promotes effective and rapid delivery of the reactive species into the liquid phase that increases the interaction between the liquid and plasma. − Using this approach, recently, we were able to produce nanodiamonds by dissociation of ethanol in its liquid state .…”

Section: Introductionmentioning

confidence: 99%

“…This novel approach in the engineering of nanomaterials is based on the direct interaction of highly nonequilibrium gas-phase plasma with a liquid medium through a plasma/liquid interface. , Such a unique combination of different states of matter provides an opportunity to realize the variety of physical and chemical processes that are not achievable by conventional techniques. Compared to the direct discharge in a liquid, sustaining the electrical discharge inside gas bubbles in a liquid reduces the energy input to produce reactive species and promotes effective and rapid delivery of the reactive species into the liquid phase that increases the interaction between the liquid and plasma. − Using this approach, recently, we were able to produce nanodiamonds by dissociation of ethanol in its liquid state . In this paper, we demonstrate that the SiOC NPs with a crystalline phase can be formed by the use of the gas bubble discharge-in-liquid technique.…”

Section: Introductionmentioning

confidence: 99%

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Efficient and Green Synthesis of SiOC Nanoparticles at Near-Ambient Conditions by Liquid-Phase Plasma

Chen

Wang

Onyshchenko

et al. 2021

ACS Sustainable Chem. Eng.

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Si-based ceramics such as silicon oxycarbide (SiOC) exhibit inimitable electrical, thermal, chemical, mechanical, and biological properties and have attracted interest for a wide range of technological applications. Recently, considerable efforts have been made to improve the conventional approach to produce Si-based ceramics that requires extreme environments and cannot be directly used to form the particles on a nanosize scale. In this study, we demonstrate that SiOC nanoparticles (NPs) with a crystalline phase can be synthesized at atmospheric pressure in a gas bubble discharge in liquid hexamethyldisiloxane. The as-prepared nanoparticles exhibit a carbon-free and highly crystalline structure of SiC. The mechanism of the formation of SiOC NPs was systematically studied, providing an in-depth understanding of the formation of SiOC NPs and insight on the way to control the structures of Si-based ceramic NPs. This novel approach offers a simple, efficient, and green route for the production of SiOC NPs and has great potential to produce such nanomaterials on a large scale.

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Section: ■ Introductionmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Efficient and Green Synthesis of SiOC Nanoparticles at Near-Ambient Conditions by Liquid-Phase Plasma

Chen

Wang

Onyshchenko

et al. 2021

ACS Sustainable Chem. Eng.

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“…Accordingly, working gases (e.g. Ar and He) are introduced into liquid to generate so-called 'bubble discharge in liquid' to reduce the breakdown voltage of discharge [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Unveiling the pathways of ethanol decomposition to carbon radicals by nanosecond pulse bubble discharge in liquid: a two-step hybrid model

Li,

Shi,

Wang

et al. 2024

J. Phys. D: Appl. Phys.

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In recent years, bubble discharge in liquid has become a novel approach for the synthesis of carbon nanomaterials; however, the fundamental discharge process and synthesis mechanism are still not well understood. In this work, we build a two-step simulation model (combining 2D fluid dynamics and zero-dimensional plasma kinetics) to investigate nanosecond pulse discharge in an Ar bubble immersed in liquid ethanol and chemical reaction processes inside. The 2D simulation results show that discharge develops along the gas‒liquid interface where ethanol decomposes, resulting in much higher densities of active species (CH3, C2H5 and OH). The electric field of the selected reference point near the interface obtained by the 2D model is transmitted into the 0D model. The numerical results show that the decomposition of ethanol mainly occurs at the discharge stage, in which electron impact dissociation (e.g., C2H5OH + e → CH2OH + CH3 + e) and Penning dissociation (e.g., C2H5OH + Ar* → CH2OH + CH3 + Ar) dominate. The density of all carbonaceous species rapidly increases during discharge, while that of some carbon radicals (CH and C) continues to increase due to neutral species reactions when discharge ceases. By quantitative analysis of the reaction contributions, the dominant pathways of C2, CH and C are revealed, i.e., C2H5OH → C2H5 → [C2H, C2H2, C2H3] → C2 and C2H5OH → CH3 → CH2 → CH → C. In addition, the formation pathways of H and OH radicals, which are indispensable for the transformation of carbonaceous intermediates, are also analysed.

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“…In addition, it is possible to organize the production of motor fuel in the fields, the development of the gas-chemical industry and the production of new products from oil and gas raw materials [10][11][12][13]. When a gaseous hydrocarbon mixture is catalytically decomposed, carbon nanomaterials and hydrogen are formed.…”

Section: Introductionmentioning

confidence: 99%

Study of possibilities of getting nanocarbons from butadien-1.3 and texture characteristics of nanocarbons and catalyses

Djanikulov,

Fayzullayev

2023

E3S Web of Conf.

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The purpose of the study is to study the possibility of obtaining nanocarbons in a catalyst containing 15%Ni*5%Co*5%Fe*5%Cu*2% Mo/HSZ and to check the texture characteristics of the catalyst and nanocarbon. The research method is a catalyst containing 15%Ni*5%Co*5%Fe*5%Cu*2%Mo/HSZ prepared by precipitation of nitrates of the corresponding metals. The method of examination is electron microscopy. The morphological composition of the samples was performed by scanning electron microscopy (SEM) on a device "JEOL JSM-6390 LA" equipped with an energy dispersion X-ray microanalysis unit (EDX). We place the sample on double-sided carbon conductive tape glued to a copper-chrome table. Then we vacuum it in the instrument chamber. Microphotography recording was performed at 5-25 kV working distances and 8-10 mm under accelerating voltage. EDX spectra were recorded at 20 kV, with a working distance of 10 mm. The microstructure of the samples was examined by scanning electron microscopy. The JEOL 2100F used an accelerating voltage of 200 kV. The samples were dispersed, processed in ultrasound with methanol, and rubbed on a copper wall. The catalysts were preheated and passivated at 400 ℃ for 4 h at a 30 ml/min flow of nitrogen. Recycled catalysts are also 2% by volume in an oxygen-argon mixture. The O2/Ar reaction was inactivated at room temperature after cessation. The average size of the metal particles and the diameter of the carbon nanotubes were determined in the Image-ProPlus program. We calculated the average size of 500 particles for each catalyst, and 100 carbon nanotubes were processed to measure the average diameter of the carbon nanotubes. After synthesis and functionalization of carriers in the catalyst 15%Ni*5%Co*5%Fe*5%Cu*2%Mo/HSZ, the nanocarbons were condensed, and their outer diameter remained unchanged and amounted to 10-30 nm. Carbon nanotubes range in diameter from 5 to 15 nm, depending on the size of the metal particles, and in length from a few microns. The main conclusions are that the highly dispersed metal particles located at the ends of the nanotubes are an important factor in the growth of nanotubes. Larger iron particles are characterized by changes in the diameter of carbon nanotubes during growth. At the beginning of growth, the diameter of such a nanotube is 30...50 nm; however, it decreases to 5...15 nm.

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Rapid Formation of Diamond-Like Nano-Carbons in a Gas Bubble Discharge in Liquid Ethanol

Cited by 9 publications

References 37 publications

Efficient and Green Synthesis of SiOC Nanoparticles at Near-Ambient Conditions by Liquid-Phase Plasma

Efficient and Green Synthesis of SiOC Nanoparticles at Near-Ambient Conditions by Liquid-Phase Plasma

Unveiling the pathways of ethanol decomposition to carbon radicals by nanosecond pulse bubble discharge in liquid: a two-step hybrid model

Study of possibilities of getting nanocarbons from butadien-1.3 and texture characteristics of nanocarbons and catalyses

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