Improvement of electrochemical NO2 sensor by use of carbon–fluorocarbon gas permeable electrode

Mizutani, Yoshitaka; Matsuda, Hiroyuki; Ishiji, Toru; Furuya, Nagakazu; Takahashi, K.

doi:10.1016/j.snb.2004.11.084

Cited by 22 publications

(9 citation statements)

References 10 publications

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“…The reported sensitivity to NO 2 gas (52 nA/(ppm cm 2 )) was rather low. In fact, the reduction of NO 2 at different electrodes has also been studied by many researchers [3][4][5][6][7][8][9][10]. The generally accepted mechanism for cathodic reduction of NO 2 involves transfer of two electrons and can be expressed as…”

Section: Introductionmentioning

confidence: 99%

“…The sensitivity and detection limit of the sensing device were 100 nA/ppm and 1.3 ppb, respectively. To improve the selectivity toward ozone, Mizutani et al [8] proposed a gas diffusion electrode, namely Au/carbon-flurocarbon membrane, for detection of NO 2 gas. With the attachment of a carbon-flurocarbon membrane, the interfering effect of ozone can be eliminated.…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical reduction of NO2 at a Pt/membrane electrode—Application to amperometric NO2 sensing

Lin

Hung

et al. 2009

Sensors and Actuators B: Chemical

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrochemical reduction of NO2 at a Pt/membrane electrode—Application to amperometric NO2 sensing

Lin

Hung

et al. 2009

Sensors and Actuators B: Chemical

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“…This signal is linearly dependent on the tested gas concentration [22]. Mizutani, et al [23] proposed a sensor constructed as a three-electrode cell system with 3 cm 3 of a 5M H2SO4 aqueous solution. The carbon-fluorocarbon mixture (C-F) was used as a gas permeable membrane of the sensing electrode.…”

Section: Introductionmentioning

confidence: 99%

Very Sensitive Optical System with the Concentration and Decomposition Unit for Explosive Trace Detection

Zakrzewska¹

2015

Metrology and Measurement Systems

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The vapour pressure of most explosives is very low. Therefore, the explosive trace detection is very difficult. To overcome the problem, concentration units can be applied. At the Institute of Optoelectronics MUT, an explosive vapour concentration and decomposition unit to operate with an optoelectronic sensor of nitrogen dioxide has been developed. This unit provides an adsorption of explosive vapours from the analysed air and then their thermal decomposition. The thermal decomposition is mainly a chemical reaction, which consists in breaking up compounds into two or more simple compounds or elements. During the heating process most explosive particles, based on nitro aromatics and alkyl nitrate, release NO2 molecules and other products of pyrolysis. In this paper, the most common methods for the NO2 detection were presented. Also, an application of the concentration and decomposition unit in the NO2 optoelectronic sensor has been discussed.

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“…For this reason, the amperometric sensing system has been used in detecting various gases. (8)(9)(10) However, a new approach based on amperometric sensing techniques is necessary to improve the sensitivity and detection limit.…”

Section: Introductionmentioning

confidence: 99%

Amperometric Sensor Consisting of Gold-Nanoparticle-Dispersed Carbon Fiber Electrodes for Blister Agent Detection

2010

Sensors and Materials

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Key words: blister agent, sulfur mustard, amperometric sensor, carbon fi ber, gold nanoparticle An amperometric sensor consisting of gold (Au)-nanoparticle-dispersed carbon fi ber (Au-NDCF) electrodes was developed for detecting a blister agent, i.e., sulfur mustard (HD) gas. A Au-NDCF electrode was prepared by casting hexane solution containing gold nanoparticles onto a carbon fi ber substrate. Field-emission scanning electron microscopy (FE-SEM) images showed that the Au particles were highly dispersed on the carbon fi ber substrate. The diameter of the Au particles varied between 2 and 10 nm. By using the Au-NDCF electrode, no signifi cant response was observed even with the introduction of atmospheric species, such as NO, NO 2 , SO 2 , O 3 , NH 3 and CO, into the environment. The Au-NDCF electrode exhibited a relatively high sensitivity to HD, and the signal-tonoise (S/N) ratio of the proposed sensor depended on the amount of Au nanoparticles on the carbon fi ber and the potential applied to the Au-NDCF electrode. Thus, the resulting electrode could be used for HD (1-20 mg/m 3 ) detection without the error caused by atmospheric interferences. An HD detection limit (S/N = 3) of 1.5 mg/m 3 was obtained, which is the required concentration for an on-site HD monitoring system.

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Improvement of electrochemical NO2 sensor by use of carbon–fluorocarbon gas permeable electrode

Cited by 22 publications

References 10 publications

Electrochemical reduction of NO2 at a Pt/membrane electrode—Application to amperometric NO2 sensing

Electrochemical reduction of NO2 at a Pt/membrane electrode—Application to amperometric NO2 sensing

Very Sensitive Optical System with the Concentration and Decomposition Unit for Explosive Trace Detection

Amperometric Sensor Consisting of Gold-Nanoparticle-Dispersed Carbon Fiber Electrodes for Blister Agent Detection

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