Detection of hydrogen fluoride using SnO2-based gas sensors: Understanding of the reactional mechanism

Berger, Franck; Sanchez, Jean-Baptiste; Heintz, O.

doi:10.1016/j.snb.2009.08.054

Cited by 32 publications

(17 citation statements)

References 11 publications

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“…Gas sensing is receiving increasing attention in industrial production, medical applications, and environmental monitoring [1][2][3][4][5]. A gas sensor's good performance is indicated by factors such as sensitivity, response time, energy consumption, long term monitoring, and reproducibility [4].…”

Section: Introductionmentioning

confidence: 99%

“…A gas sensor's good performance is indicated by factors such as sensitivity, response time, energy consumption, long term monitoring, and reproducibility [4]. To achieve good gas sensing performance, several methods [6] (optical, gas chromatographic, and acoustic methods) and materials (metal oxide semiconductors [3], carbon nanotubes [7], and polymers [8]) have been developed.…”

Section: Introductionmentioning

confidence: 99%

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Gas sensing properties of indium–gallium–zinc–oxide gas sensors in different light intensity

Chen

Jiang

Chang

et al. 2015

Analytical Chemistry Research

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a b s t r a c tWe have successfully observed the change in indium-gallium-zinc-oxide (IGZO) gas sensor sensitivity by controlling the light emitting diode (LED) power under the same gas concentrations. The light intensity dependence of sensor properties is discussed. Different LED intensities obviously affected the gas sensor sensitivity, which decays with increasing LED intensity. High LED intensity decreases not only gas sensor sensitivity but also the response time (T 90 ), response time constant (s res ) and the absorption rate per second. Low intensity irradiated to sensor causes high sensitivity, but it needs larger response time. Similar results were also observed in other kinds of materials such as TiO 2 . According to the results, the sensing properties of gas sensors can be modulated by controlling the light intensity.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Gas sensing properties of indium–gallium–zinc–oxide gas sensors in different light intensity

Chen

Jiang

Chang

et al. 2015

Analytical Chemistry Research

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“…galvanic-type sensors that are based on MnO 2 gas-diffusion electrodes [2]), which are used for hydrohalogen (HBr, HCl, and HF) concentration measurement in the air. Other examples are tin-dioxide-based gas sensors, which can detect hydrogen fluoride traces at part per billion (ppb) concentration [3,4]. Most of these sensors, however, have a high cost and not able to work in the presence of high intensity electric filed.…”

Section: Introductionmentioning

confidence: 99%

Innovative Low-Cost Plastic Optical Fiber Sensors for Gas Monitoring

Ishtaiwi

2014

Proceedings of International Electronic Conference on Sensors and Applications

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In this study, a new simple and low-cost plastic optical fiber sensor for the measurements of low concentration HF vapors is described. The sensitivity to the HF vapors obtained by depositing a thin glass-like layer onto the PMMA core fiber after removing the fluorinated polymer cladding via dipping the fiber into ethyl acetate for a short period, not more than 40 second. Moreover, in order to enhance the fiber sensitivity, low pressure plasma treatments have been carried out in O 2 and Ar gas mixtures on polymeric optical core fibers in order to increase the core surface area without damaging the PMMA core fiber. The reaction of glass-like layer with the HF vapor alters the fiber light transmission and is detected by means of a wide-band photodiode. POF sensors can find relevant applications for monitoring people exposed to unhealthy atmospheres in civil and industrial fields, and for monitoring the pollutants in gaseous mixtures. Several prototypes of fiber sensors have been fabricated and characterized in the reaction chamber. The obtained results demonstrating the capability to detect low concentration of HF vapors with high sensitivity.

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“…galvanic-type sensors which are based on MnO 2 gas-diffusion electrodes [6]) have a measuring range of 20 ppm which is too high for this type of measurement. More sensitive sensors such as tin dioxide and Al-doped graphene based devices [7], [8], [9] have been proposed to detect hydrogen fluoride traces at part-per-billion concentration, but have a high cost so that the monitoring of more than 1000 RPCs can be difficult to be obtained.…”

Section: Introductionmentioning

confidence: 99%