A highly efficient magnetically confined ion source for real time on-line monitoring of trace compounds in ambient air

Tang, Jie; Ding, Xuelu; Zhang, Pei; Lei, Bingying; Zhao, Zhongjun; Duan, Yixiang

doi:10.1039/c8cc05360j

Cited by 14 publications

(3 citation statements)

References 22 publications

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“…By measuring the Boltzmann distribution of the reaction system, the necessary data for indicating the local thermodynamic equilibrium are obtained: the vibrational temperature ( T vib ) and rotational temperature ( T rot ). , Data are collected from handheld charge-coupled devices. After data processing, the emission spectrum of N 2 (C–B) is obtained (Figure a) .…”

Section: Possible Synthesis Mechanismmentioning

confidence: 99%

CuO Nanosheets Prepared by Dielectric Barrier Discharge Microplasma as Catalysts for the Oxygen Evolution Reaction

Qin

et al. 2022

ACS Appl. Nano Mater.

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A method for constructing transition metal catalysts for the oxygen evolution reaction (OER) is proposed. Facile preparation is realized in the case of no added metal source via dielectric barrier discharge (DBD) microplasma under 10 min, and the thickness of the nanosheet is only 6.5 nm. The prepared ultrathin CuO nanosheets on copper foam (CuO UTNS/CF) display a catalytic activity of 262 mV overpotential (η) at 10 mA cm −2 for the OER in alkaline media. The asprepared electrocatalyst guarantees appealing long-term durability (>90 h) and a high turnover frequency (TOF) of 0.488 mol O 2 s −1 at 426 mV. Compared to CuO/CF prepared traditionally, the overpotential of CuO UTNS/CF can be directly reduced to 38 mV. Moreover, hydroxyl radicals ( • OH) were identified as the intermediate products and a possible synthesis mechanism was preliminarily put forward. As a facile technology for the OER catalyst, we believe that DBD microplasma will provide a broad perspective for researchers.

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Section: Possible Synthesis Mechanismmentioning

confidence: 99%

CuO Nanosheets Prepared by Dielectric Barrier Discharge Microplasma as Catalysts for the Oxygen Evolution Reaction

Qin

et al. 2022

ACS Appl. Nano Mater.

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“…To explore the possible synthesis mechanism and the excitation efficiency of the DBD microplasma, the physical parameters of the DBD were calculated. Considering the microplasma used conformed to local thermodynamic equilibrium (LTE), the characteristics should accord with the Boltzmann distribution [59,60]. The Time-resolved spectral information was measured by a handheld commercial CCD, and the bands (0-2), (1-3), (2-4) of N 2 (C-B) emission spectra were acquired [61].…”

Section: Possible Synthesis Mechanismmentioning

confidence: 99%

Fast and facile synthesis of carbonate-modified NiFe layered double hydroxide nanosheets by dielectric barrier discharge microplasma: mechanism and application in enhanced water oxidation

et al. 2021

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A fast and facile approach was designed to fabricate carbonate (Ci)-modified NiFe layered double hydroxide (LDH) nanosheets array on carbon cloth (CC) by dielectric barrier discharge (DBD) microplasma. The whole synthetic process can be completed within 1 h at ambient temperature and pressure. The prepared NiFe LDH-Ci/CC emerges a superior catalytic activity for oxygen evolving reaction in alkaline media, which only demands an overpotential of 240 mV at 20 mA cm -2 with a high stability for at least 90 h, and shows an excellent turnover frequency value of 0.323 mol O 2 s -1 at 350 mV. Time-resolved measurements of direct emission spectra for nitrogen second positive system N 2 (C-B) were measured in the DBD microplasma discharge. And a high vibrational temperature (T vib , 3100 K) and rotational temperature (T rot , 340 K) were obtained, indicating a great chemical reactivity. In addition, the intermediate products of hydroxyl radicals ( Á OH) were identified and the possible synthesis mechanism was tentatively proposed.

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“…Nonequilibrium atmospheric‐pressure plasmas have been extensively used in various practical applications such as material processing, thin film deposition, nanoscience, plasma medicine, biological sterilization, and chemical analysis, due to their prevailing advantage of avoiding the expensive vacuum system . These plasmas are usually generated in dielectric‐barrier discharge (DBD), direct‐current (DC) glow discharge, microwave discharge, and radio‐frequency discharge . Large and uniform plasmas are in urgent need for treating samples because of their high working efficiency.…”

Section: Introductionmentioning

confidence: 99%

A Highly Cost‐Efficient Large‐Scale Uniform Laminar Plasma Jet Array Enhanced by V–I Characteristic Modulation in a Non‐Self‐Sustained Atmospheric Discharge

Wang

Lei

et al. 2020

Advanced Science

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Developing cost‐efficient large‐scale uniform plasma jets represents a significant challenge for high performance in material processing and plasma medicine. Here, a V–I characteristic modulation approach is proposed to reduce the discharge power and increase the plasma scale and chemical activity in non‐self‐sustained atmospheric direct‐current discharges. The electric field in discharge space is optimized to fundamentally empower simultaneously initiating all discharge cells far below Townsend breakdown potential and stably sustaining each plasma jet at low voltage. These strategies create a crucial step to fabricating a flexible and compact low‐power large‐scale uniform laminar plasma jet array (LPJA) with high activity in cheap argon. The mechanisms behind the discharge enhancement are revealed by combining V–I characteristic examination and a modulation model. Compared with conventional arrays, this LPJA possesses the widest size (90 mm) and raises its uniformity from 30% to 97%. Comparing different discharge modes shows that the LPJA scale is surprisingly increased nearly by 4 times with the discharge power reduced from 7.4 to 4.8 W. The methodology provides a highly cost‐efficient roadmap to break through the bottleneck of restricting low‐power discharge, large‐gap discharge, large‐scale discharge, parallel‐multi‐electrode discharge, and uniform discharge together. This advance will meet the urgent need for various plasma applications.

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A highly efficient magnetically confined ion source for real time on-line monitoring of trace compounds in ambient air

Abstract: A magnetically confined ambient ion source enables a great improvement in the MS signal intensity and detection sensitivity.

Cited by 14 publications

References 22 publications

CuO Nanosheets Prepared by Dielectric Barrier Discharge Microplasma as Catalysts for the Oxygen Evolution Reaction

CuO Nanosheets Prepared by Dielectric Barrier Discharge Microplasma as Catalysts for the Oxygen Evolution Reaction

Fast and facile synthesis of carbonate-modified NiFe layered double hydroxide nanosheets by dielectric barrier discharge microplasma: mechanism and application in enhanced water oxidation

A Highly Cost‐Efficient Large‐Scale Uniform Laminar Plasma Jet Array Enhanced by V–I Characteristic Modulation in a Non‐Self‐Sustained Atmospheric Discharge

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