Determination of low chlorine concentrations in air using semiconductor chemical sensors

Белышева, Т. В.; Bogovtseva, L. P.

doi:10.1134/s106193480605011x

Cited by 7 publications

(4 citation statements)

References 7 publications

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“…For example, Wang et al [7] synthesized mesoporous SnO 2 -based sensor which was sensitive to chlorine gas at 370 ℃. In 2 O 3 sensor synthesized by Belysheva and Bogovtseva [9] showed better sensitivity to chlorine gas at 300 ℃, and CdIn 2 O 4 sensors [10] we prepared before showed faster response to chlorine gas at about 220-300 ℃. Therefore, it is necessary to improve the property of chlorine gas sensors in order to decrease the working temperature.…”

Section: Introductionmentioning

confidence: 99%

“…Gas sensors play an important role in environmental monitoring. In recent years, some metal oxides and complex metal oxides have been reported to be used as chlorine gas sensors [3][4][5][6][7][8][9][10][11][12], but many of those sensors work at high temperature [5][6][7][8][9][10][11][12]. For example, Wang et al [7] synthesized mesoporous SnO 2 -based sensor which was sensitive to chlorine gas at 370 ℃.…”

Section: Introductionmentioning

confidence: 99%

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Room-temperature chlorine gas sensor based on CdSnO3 synthesized by hydrothermal process

Zhao

Lou

et al. 2013

J Adv Ceram

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Abstract:The perovskite-structure CdSnO 3 was obtained by calcinating CdSnO 3 ·3H 2 O precursor at 550 ℃, which was synthesized by hydrothermal process at 170 ℃ for 16 h. The phase and microstructure of the obtained CdSnO 3 powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The CdSnO 3 powders exhibit uniformly cubic structure with side length of about 100 nm. The effects of working temperature and concentration of detected gas on the gas response were studied. The selectivity of chlorine gas against other gases and response-recovery time of the sensor were also investigated. The results reveal that the CdSnO 3 gas sensor has enhanced sensing properties to 1-10 ppm chlorine gas at room temperature; the value of gas response can reach 1338.9 to 5 ppm chlorine gas. Moreover, the sensor shows good selectivity and quick response behavior (23 s) to chlorine gas, indicating its application in detecting chlorine gas at room temperature in the future.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Room-temperature chlorine gas sensor based on CdSnO3 synthesized by hydrothermal process

Zhao

Lou

et al. 2013

J Adv Ceram

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“…This current increase is in contrast to bulk Ni film [ 34 ], where a current decrease was reported. This difference can be explained by taking into account the role of native nickel oxide (NiO on the Ni shell) [ 35 ]. It is known that a native oxide film with thickness of a few nanometers is formed on the Ni surface at room temperature [ 24 ].…”

Section: Resultsmentioning

confidence: 99%

“…NiO is a p-type semiconductor with a bandgap energy of 3.6 to 4.0 eV and has been widely utilized as a gas-sensing material with environmental stability [ 10 , 36 ]. Here, we propose that the current increase in our sensors is due to the depletion of electrons caused by the replacement of mobile surface oxygen in the native NiO region with the adsorbed Cl 2 , resulting in the increase of hole concentration [ 13 , 35 , 37 ]. A further study of the effect of intentional oxidation on the Ni-Si NWs to increase the sensitivity to Cl 2 gas will be performed in the future.…”

Section: Resultsmentioning

confidence: 99%

Real-time detection of chlorine gas using Ni/Si shell/core nanowires

et al. 2015

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We demonstrate the selective adsorption of Ni/Si shell/core nanowires (Ni-Si NWs) with a Ni outer shell and a Si inner core on molecularly patterned substrates and their application to sensors for the detection of chlorine gas, a toxic halogen gas. The molecularly patterned substrates consisted of polar SiO2 regions and nonpolar regions of self-assembled monolayers of octadecyltrichlorosilane (OTS). The NWs showed selective adsorption on the polar SiO2 regions, avoiding assembly on the nonpolar OTS regions. Utilizing these assembled Ni-Si NWs, we demonstrate a sensor for the detection of chlorine gas. The utilization of Ni-Si NWs resulted in a much larger sensor response of approximately 23% to 5 ppm of chlorine gas compared to bare Ni NWs, due to the increased surface-to-volume ratio of the Ni-Si shell/core structure. We expect that our sensor will be utilized in the future for the real-time detection of halogen gases including chlorine with high sensitivity and fast response.Electronic supplementary materialThe online version of this article (doi:10.1186/s11671-015-0729-2) contains supplementary material, which is available to authorized users.

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Adsorption and reversible detection of toxic halogens gases at room temperature by two-dimensional Al2SSe for occupational sustainability

Chang,

Yeoh,

Jiang

et al. 2024

Materials Today Communications

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Determination of low chlorine concentrations in air using semiconductor chemical sensors

Cited by 7 publications

References 7 publications

Room-temperature chlorine gas sensor based on CdSnO3 synthesized by hydrothermal process

Room-temperature chlorine gas sensor based on CdSnO3 synthesized by hydrothermal process

Real-time detection of chlorine gas using Ni/Si shell/core nanowires

Adsorption and reversible detection of toxic halogens gases at room temperature by two-dimensional Al2SSe for occupational sustainability

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