Ultrasensitive detection of trimethylamine using Rh-doped SnO2 hollow spheres prepared by ultrasonic spray pyrolysis

Yoon Ho Cho; Xishuang Liang; Yun Chan Kang; Jong Heun Lee

doi:10.1016/j.snb.2014.10.001

Ultrasensitive detection of trimethylamine using Rh-doped SnO₂ hollow spheres prepared by ultrasonic spray pyrolysis

Yoon Ho Cho, Xishuang Liang, Yun Chan Kang, Jong Heun Lee

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

87 Citations (Scopus)

Abstract

An ultrasensitive trimethylamine (TMA) sensor was achieved using Rh-doped SnO₂ hollow spheres prepared by ultrasonic spray pyrolysis followed by heat treatment at 500 °C, and the effects of Rh doping on TMA sensing characteristics were investigated. The response (resistance ratio) of the Rh-doped SnO₂ hollow spheres to 5 ppm TMA at 400°C was 1177.5, which is 33 times higher than that of pure SnO₂ hollow spheres. The detection limit of the sensor was as low as 5 ppb. In addition, the Rh-doped SnO₂ hollow spheres showed negligible cross-responses to HCHO, benzene, toluene, p-xylene, NH₃, CO, H₂, and NO₂, and a decreased cross-response to C₂H₅OH, whereas pure SnO₂ hollow spheres did not show selective detection of a specific gas. The ultrahigh sensitivity and selective detection to TMA were attributed to the electronic interactions between Rh and SnO₂ and the high catalytic activity of Rh to TMA.

Original language	English
Pages (from-to)	330-337
Number of pages	8
Journal	Sensors and Actuators, B: Chemical
Volume	207
Issue number	Part A
DOIs	https://doi.org/10.1016/j.snb.2014.10.001
Publication status	Published - 2015 Feb

Bibliographical note

Funding Information:
This work was supported by Project (No. 14003800 ) of the Technology Development Program of S/W convergence Component by Ministry of Knowledge Economy (MKE) and Korea Evaluation Institute of Industrial Technology (KEIT) and by a National Research Foundation of Korea (NRF) grant (No. 2013R1A2A1A01006545 ) funded by the Korea government ( MEST ).

Keywords

Gas sensor
Rh-doped SnO hollow sphere
Trimethylamine
Ultra-low detection limit
Ultrasonic spray pyrolysis

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

Access to Document

10.1016/j.snb.2014.10.001

Cite this

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title = "Ultrasensitive detection of trimethylamine using Rh-doped SnO2 hollow spheres prepared by ultrasonic spray pyrolysis",

abstract = "An ultrasensitive trimethylamine (TMA) sensor was achieved using Rh-doped SnO2 hollow spheres prepared by ultrasonic spray pyrolysis followed by heat treatment at 500 °C, and the effects of Rh doping on TMA sensing characteristics were investigated. The response (resistance ratio) of the Rh-doped SnO2 hollow spheres to 5 ppm TMA at 400°C was 1177.5, which is 33 times higher than that of pure SnO2 hollow spheres. The detection limit of the sensor was as low as 5 ppb. In addition, the Rh-doped SnO2 hollow spheres showed negligible cross-responses to HCHO, benzene, toluene, p-xylene, NH3, CO, H2, and NO2, and a decreased cross-response to C2H5OH, whereas pure SnO2 hollow spheres did not show selective detection of a specific gas. The ultrahigh sensitivity and selective detection to TMA were attributed to the electronic interactions between Rh and SnO2 and the high catalytic activity of Rh to TMA.",

keywords = "Gas sensor, Rh-doped SnO hollow sphere, Trimethylamine, Ultra-low detection limit, Ultrasonic spray pyrolysis",

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

note = "Funding Information: This work was supported by Project (No. 14003800 ) of the Technology Development Program of S/W convergence Component by Ministry of Knowledge Economy (MKE) and Korea Evaluation Institute of Industrial Technology (KEIT) and by a National Research Foundation of Korea (NRF) grant (No. 2013R1A2A1A01006545 ) funded by the Korea government ( MEST ). ",

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AU - Liang, Xishuang

AU - Kang, Yun Chan

AU - Lee, Jong Heun

N1 - Funding Information: This work was supported by Project (No. 14003800 ) of the Technology Development Program of S/W convergence Component by Ministry of Knowledge Economy (MKE) and Korea Evaluation Institute of Industrial Technology (KEIT) and by a National Research Foundation of Korea (NRF) grant (No. 2013R1A2A1A01006545 ) funded by the Korea government ( MEST ).

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N2 - An ultrasensitive trimethylamine (TMA) sensor was achieved using Rh-doped SnO2 hollow spheres prepared by ultrasonic spray pyrolysis followed by heat treatment at 500 °C, and the effects of Rh doping on TMA sensing characteristics were investigated. The response (resistance ratio) of the Rh-doped SnO2 hollow spheres to 5 ppm TMA at 400°C was 1177.5, which is 33 times higher than that of pure SnO2 hollow spheres. The detection limit of the sensor was as low as 5 ppb. In addition, the Rh-doped SnO2 hollow spheres showed negligible cross-responses to HCHO, benzene, toluene, p-xylene, NH3, CO, H2, and NO2, and a decreased cross-response to C2H5OH, whereas pure SnO2 hollow spheres did not show selective detection of a specific gas. The ultrahigh sensitivity and selective detection to TMA were attributed to the electronic interactions between Rh and SnO2 and the high catalytic activity of Rh to TMA.

AB - An ultrasensitive trimethylamine (TMA) sensor was achieved using Rh-doped SnO2 hollow spheres prepared by ultrasonic spray pyrolysis followed by heat treatment at 500 °C, and the effects of Rh doping on TMA sensing characteristics were investigated. The response (resistance ratio) of the Rh-doped SnO2 hollow spheres to 5 ppm TMA at 400°C was 1177.5, which is 33 times higher than that of pure SnO2 hollow spheres. The detection limit of the sensor was as low as 5 ppb. In addition, the Rh-doped SnO2 hollow spheres showed negligible cross-responses to HCHO, benzene, toluene, p-xylene, NH3, CO, H2, and NO2, and a decreased cross-response to C2H5OH, whereas pure SnO2 hollow spheres did not show selective detection of a specific gas. The ultrahigh sensitivity and selective detection to TMA were attributed to the electronic interactions between Rh and SnO2 and the high catalytic activity of Rh to TMA.

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