Effects of textural properties on the response of a SnO2-based gas sensor for the detection of chemical warfare agents

Soo Chool Lee; Seong Yeol Kim; Woo Suk Lee; Suk Yong Jung; Byung Wook Hwang; Dhanusuraman Ragupathy; Duk Dong Lee; Sang Yeon Lee; Jae Chang Kim

doi:10.3390/s110706893

Effects of textural properties on the response of a SnO₂-based gas sensor for the detection of chemical warfare agents

Soo Chool Lee, Seong Yeol Kim, Woo Suk Lee, Suk Yong Jung, Byung Wook Hwang, Dhanusuraman Ragupathy, Duk Dong Lee, Sang Yeon Lee, Jae Chang Kim

Department of Applied Chemistry

Kyungpook National University

Research output: Contribution to journal › Article › peer-review

42 Scopus citations

Abstract

The sensing behavior of SnO₂-based thick film gas sensors in a flow system in the presence of a very low concentration (ppb level) of chemical agent simulants such as acetonitrile, dipropylene glycol methyl ether (DPGME), dimethyl methylphosphonate (DMMP), and dichloromethane (DCM) was investigated. Commercial SnO₂ [SnO₂(C)] and nano-SnO₂ prepared by the precipitation method [SnO₂(P)] were used to prepare the SnO₂ sensor in this study. In the case of DCM and acetonitrile, the SnO₂(P) sensor showed higher sensor response as compared with the SnO₂(C) sensors. In the case of DMMP and DPGME, however, the SnO₂(C) sensor showed higher responses than those of the SnO₂(P) sensors. In particular, the response of the SnO₂(P) sensor increased as the calcination temperature increased from 400 ° C to 800 ° C. These results can be explained by the fact that the response of the SnO₂-based gas sensor depends on the textural properties of tin oxide and the molecular size of the chemical agent simulant in the detection of the simulant gases (0.1-0.5 ppm).

Original language	English
Pages (from-to)	6893-6904
Number of pages	12
Journal	Sensors
Volume	11
Issue number	7
DOIs	https://doi.org/10.3390/s110706893
State	Published - Jul 2011

Keywords

Chemical agent simulant
Sensor
Sensor response
SnO

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title = "Effects of textural properties on the response of a SnO2-based gas sensor for the detection of chemical warfare agents",

abstract = "The sensing behavior of SnO2-based thick film gas sensors in a flow system in the presence of a very low concentration (ppb level) of chemical agent simulants such as acetonitrile, dipropylene glycol methyl ether (DPGME), dimethyl methylphosphonate (DMMP), and dichloromethane (DCM) was investigated. Commercial SnO2 [SnO2(C)] and nano-SnO2 prepared by the precipitation method [SnO2(P)] were used to prepare the SnO2 sensor in this study. In the case of DCM and acetonitrile, the SnO2(P) sensor showed higher sensor response as compared with the SnO2(C) sensors. In the case of DMMP and DPGME, however, the SnO2(C) sensor showed higher responses than those of the SnO2(P) sensors. In particular, the response of the SnO2(P) sensor increased as the calcination temperature increased from 400 ° C to 800 ° C. These results can be explained by the fact that the response of the SnO2-based gas sensor depends on the textural properties of tin oxide and the molecular size of the chemical agent simulant in the detection of the simulant gases (0.1-0.5 ppm).",

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AU - Lee, Soo Chool

AU - Kim, Seong Yeol

AU - Lee, Woo Suk

AU - Jung, Suk Yong

AU - Hwang, Byung Wook

AU - Ragupathy, Dhanusuraman

AU - Lee, Duk Dong

AU - Lee, Sang Yeon

AU - Kim, Jae Chang

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AB - The sensing behavior of SnO2-based thick film gas sensors in a flow system in the presence of a very low concentration (ppb level) of chemical agent simulants such as acetonitrile, dipropylene glycol methyl ether (DPGME), dimethyl methylphosphonate (DMMP), and dichloromethane (DCM) was investigated. Commercial SnO2 [SnO2(C)] and nano-SnO2 prepared by the precipitation method [SnO2(P)] were used to prepare the SnO2 sensor in this study. In the case of DCM and acetonitrile, the SnO2(P) sensor showed higher sensor response as compared with the SnO2(C) sensors. In the case of DMMP and DPGME, however, the SnO2(C) sensor showed higher responses than those of the SnO2(P) sensors. In particular, the response of the SnO2(P) sensor increased as the calcination temperature increased from 400 ° C to 800 ° C. These results can be explained by the fact that the response of the SnO2-based gas sensor depends on the textural properties of tin oxide and the molecular size of the chemical agent simulant in the detection of the simulant gases (0.1-0.5 ppm).

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Effects of textural properties on the response of a SnO₂-based gas sensor for the detection of chemical warfare agents

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