Optical and Electrical Diagnostics of a High-Frequency Glow–Arc Discharge and Its Application to the Synthesis of Carbon Nanofibers

Valdivia-Barrientos, R.; Pacheco-Sotelo, J.O.; Pacheco-Pacheco, M.; Ramos-Flores, Jose Fidel; Cruz-Azocar, Aurelio; Jimenez-Lopez, Maria de Lourdes; Benítez-Read, Jorge Samuel; López-Callejas, Régulo

doi:10.1109/tps.2007.906137

Cited by 8 publications

(4 citation statements)

References 21 publications

(26 reference statements)

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“…As shown in Fig. 3 a , the discharge belongs to a typical glow discharge mode [20–22]. In this case, it can be noted that the current variation is slower and of longer duration (∼35 µs), and the current peak is about 21 mA.…”

Section: Resultsmentioning

confidence: 99%

Detection of trace heavy metals using atmospheric pressure glow discharge by optical emission spectra

Yang

Yuan

et al. 2019

High Voltage

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In this Letter, atmospheric pressure glow discharge based on a small discharge gap is excited by sine AC voltage in air on purpose of detecting trace heavy metal elements in solid samples, which makes the detection limits of trace heavy metal elements reach tens μg/kg. The waveforms of voltage and discharge current, discharge images, plasma gas temperature, and optical emission spectra are obtained to discuss the feasibility of atmospheric pressure glow discharge on detection of trace heavy metals. The formation mechanism of optical emission spectra and the strong emission intensity of heavy metal elements show that energetic electrons and excited metal atoms are easily generated by atmospheric pressure glow discharge. The effects of applied voltage and discharge gap on atmospheric pressure glow discharge are discussed to acquire the optimal experimental conditions. And a smaller discharge gap and applied voltage can restrain the transition from glow discharge to arc discharge. Besides, the limits of detections of Cu and Cd are about 0.0241 and 0.0318 μg/g, respectively, by using atmospheric pressure glow discharge with an applied voltage of 3.8 kV, discharge gap of 3.5 mm, and driving frequency of 10 kHz.

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Section: Resultsmentioning

confidence: 99%

Detection of trace heavy metals using atmospheric pressure glow discharge by optical emission spectra

Yang

Yuan

et al. 2019

High Voltage

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“…Furthermore, the functionalities of CNFs are easily tailored through both chemical and physical alterations, which is extremely beneficial for doping functional nanoscale building blocks on the surface of CNFs, which yield a variety of CNF-based functional nanomaterials. CNFs have been manufactured using a wide range of techniques, including catalytic chemical vapor deposition (CCVD) [72], arc discharge [73], and laser ablation [74]. While arc discharge and laser ablation produce high-purity CNFs, they require a large-scale operation and substantial production costs.…”

Section: Carbon Nanofiber-based Electrode Materialsmentioning

confidence: 99%

Recent Developments in Carbon-Based Nanocomposites for Fuel Cell Applications: A Review

et al. 2022

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Carbon-based nanocomposites have developed as the most promising and emerging materials in nanoscience and technology during the last several years. They are microscopic materials that range in size from 1 to 100 nanometers. They may be distinguished from bulk materials by their size, shape, increased surface-to-volume ratio, and unique physical and chemical characteristics. Carbon nanocomposite matrixes are often created by combining more than two distinct solid phase types. The nanocomposites that were constructed exhibit unique properties, such as significantly enhanced toughness, mechanical strength, and thermal/electrochemical conductivity. As a result of these advantages, nanocomposites have been used in a variety of applications, including catalysts, electrochemical sensors, biosensors, and energy storage devices, among others. This study focuses on the usage of several forms of carbon nanomaterials, such as carbon aerogels, carbon nanofibers, graphene, carbon nanotubes, and fullerenes, in the development of hydrogen fuel cells. These fuel cells have been successfully employed in numerous commercial sectors in recent years, notably in the car industry, due to their cost-effectiveness, eco-friendliness, and long-cyclic durability. Further; we discuss the principles, reaction mechanisms, and cyclic stability of the fuel cells and also new strategies and future challenges related to the development of viable fuel cells.

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“…The curves of the electric evolution from glowtoarc discharge as well as the traces of voltage versus current in both regimes were plotted using the real data obtained during the experiments carried out with the setup described in figure 1(a). These results are shown in figure 1(b) [45]. By multiplying the voltage by the current, the instant power applied to the plasma is determined and the rms power values are 51W for glow discharge and 96.7 W for the arc discharge.…”

Section: Experimental Set-upmentioning

confidence: 99%

Synthesis of Carbon Nanofibers by a Glow-Arc Discharge

Pacheco¹,

Pacheco²,

Valdivia³

2010

Nanofibers

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Optical and Electrical Diagnostics of a High-Frequency Glow–Arc Discharge and Its Application to the Synthesis of Carbon Nanofibers

Cited by 8 publications

References 21 publications

Detection of trace heavy metals using atmospheric pressure glow discharge by optical emission spectra

Detection of trace heavy metals using atmospheric pressure glow discharge by optical emission spectra

Recent Developments in Carbon-Based Nanocomposites for Fuel Cell Applications: A Review

Synthesis of Carbon Nanofibers by a Glow-Arc Discharge

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