Highly selective and sensitive detection of trimethylamine using wo3 hollow spheres prepared by ultrasonic spray pyrolysis

Yoon Ho Cho; Yun Chan Kang; Jong Heun Lee

doi:10.1016/j.snb.2012.10.044

Highly selective and sensitive detection of trimethylamine using wo3 hollow spheres prepared by ultrasonic spray pyrolysis

Yoon Ho Cho, Yun Chan Kang, Jong Heun Lee

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75 Citations (Scopus)

Abstract

WO3 hollow spheres were prepared by ultrasonic spray pyrolysis of a citric-acid-containing precursor solution, and their trimethylamine-sensing characteristics were investigated. The WO3 hollow spheres showed a high response to 5 ppm of trimethylamine (Ra/Rg = 56.9, Ra: resistance in air, Rg: resistance in gas) with low cross-responses to 5 ppm C₂H₅OH, CO, CH₄, C₃H₈, H₂, NH₃, and NO₂. The high gas response observed was explained by the effective electron depletion of small primary particles and the enhanced gas accessibility of hollow structures with thin and porous shells. The enhanced trimethylamine selectivity was discussed in terms of the interaction between basic analyte gas and acidic sensing materials.

Original language	English
Pages (from-to)	971-977
Number of pages	7
Journal	Sensors and Actuators, B: Chemical
Volume	176
DOIs	https://doi.org/10.1016/j.snb.2012.10.044
Publication status	Published - 2013

Keywords

Gas sensors
Selective detection
Trimethylamine
Ultrasonic spray pyrolysis
WO3 hollow spheres

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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10.1016/j.snb.2012.10.044

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title = "Highly selective and sensitive detection of trimethylamine using wo3 hollow spheres prepared by ultrasonic spray pyrolysis",

abstract = "WO3 hollow spheres were prepared by ultrasonic spray pyrolysis of a citric-acid-containing precursor solution, and their trimethylamine-sensing characteristics were investigated. The WO3 hollow spheres showed a high response to 5 ppm of trimethylamine (Ra/Rg = 56.9, Ra: resistance in air, Rg: resistance in gas) with low cross-responses to 5 ppm C2H5OH, CO, CH4, C3H8, H2, NH3, and NO2. The high gas response observed was explained by the effective electron depletion of small primary particles and the enhanced gas accessibility of hollow structures with thin and porous shells. The enhanced trimethylamine selectivity was discussed in terms of the interaction between basic analyte gas and acidic sensing materials.",

keywords = "Gas sensors, Selective detection, Trimethylamine, Ultrasonic spray pyrolysis, WO3 hollow spheres",

author = "{Ho Cho}, Yoon and {Chan Kang}, Yun and Lee, {Jong Heun}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MEST) (No. R0A-2008-000-20032-0 ). ",

year = "2013",

doi = "10.1016/j.snb.2012.10.044",

language = "English",

volume = "176",

pages = "971--977",

journal = "Sensors and Actuators, B: Chemical",

issn = "0925-4005",

publisher = "Elsevier",

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T1 - Highly selective and sensitive detection of trimethylamine using wo3 hollow spheres prepared by ultrasonic spray pyrolysis

AU - Ho Cho, Yoon

AU - Chan Kang, Yun

AU - Lee, Jong Heun

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MEST) (No. R0A-2008-000-20032-0 ).

PY - 2013

Y1 - 2013

N2 - WO3 hollow spheres were prepared by ultrasonic spray pyrolysis of a citric-acid-containing precursor solution, and their trimethylamine-sensing characteristics were investigated. The WO3 hollow spheres showed a high response to 5 ppm of trimethylamine (Ra/Rg = 56.9, Ra: resistance in air, Rg: resistance in gas) with low cross-responses to 5 ppm C2H5OH, CO, CH4, C3H8, H2, NH3, and NO2. The high gas response observed was explained by the effective electron depletion of small primary particles and the enhanced gas accessibility of hollow structures with thin and porous shells. The enhanced trimethylamine selectivity was discussed in terms of the interaction between basic analyte gas and acidic sensing materials.

AB - WO3 hollow spheres were prepared by ultrasonic spray pyrolysis of a citric-acid-containing precursor solution, and their trimethylamine-sensing characteristics were investigated. The WO3 hollow spheres showed a high response to 5 ppm of trimethylamine (Ra/Rg = 56.9, Ra: resistance in air, Rg: resistance in gas) with low cross-responses to 5 ppm C2H5OH, CO, CH4, C3H8, H2, NH3, and NO2. The high gas response observed was explained by the effective electron depletion of small primary particles and the enhanced gas accessibility of hollow structures with thin and porous shells. The enhanced trimethylamine selectivity was discussed in terms of the interaction between basic analyte gas and acidic sensing materials.

KW - Gas sensors

KW - Selective detection

KW - Trimethylamine

KW - Ultrasonic spray pyrolysis

KW - WO3 hollow spheres

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U2 - 10.1016/j.snb.2012.10.044

DO - 10.1016/j.snb.2012.10.044

M3 - Article

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SN - 0925-4005

VL - 176

SP - 971

EP - 977

JO - Sensors and Actuators, B: Chemical

JF - Sensors and Actuators, B: Chemical

ER -

Highly selective and sensitive detection of trimethylamine using wo3 hollow spheres prepared by ultrasonic spray pyrolysis

Abstract

Keywords

ASJC Scopus subject areas

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