Improvement of dynamic gas sensing behavior of SnO2 acicular particles by microwave calcination

Pyeong Seok Cho; Ki Won Kim; Jong Heun Lee

doi:10.1016/j.snb.2006.11.007

Improvement of dynamic gas sensing behavior of SnO₂ acicular particles by microwave calcination

Pyeong Seok Cho, Ki Won Kim, Jong Heun Lee

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

21 Citations (Scopus)

Abstract

The CO response time of SnO₂ acicular-particle-type gas sensors was shortened to a great extent using rapid microwave calcination. When SnO₂ acicular particles were prepared by the slow heating (heating rate: 4.2 °C/min) of a SnC₂O₄ precursor to the calcination temperature (500 °C) using a conventional furnace, the 90% response time to 30 ppm CO (t_90%(air-to-CO)) was 76 s at a sensing temperature of 450 °C. However, the t_90%(air-to-CO) decreased markedly down to 5-27 s when the precursor was heated rapidly (heating rate: 25-100 °C/min) using a microwave furnace. The significant shortening of the response time was attributed to the formation of a mesoporous structure in the SnO₂ acicular particles due to rapid gas evolution during the decomposition of the SnC₂O₄ precursor.

Original language	English
Pages (from-to)	1034-1039
Number of pages	6
Journal	Sensors and Actuators, B: Chemical
Volume	123
Issue number	2
DOIs	https://doi.org/10.1016/j.snb.2006.11.007
Publication status	Published - 2007 May 21

Keywords

Gas Sensors
Mesoporous structure
Microwave calcination
Response time
SnO acicular particles

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.2006.11.007

Cite this

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title = "Improvement of dynamic gas sensing behavior of SnO2 acicular particles by microwave calcination",

abstract = "The CO response time of SnO2 acicular-particle-type gas sensors was shortened to a great extent using rapid microwave calcination. When SnO2 acicular particles were prepared by the slow heating (heating rate: 4.2 °C/min) of a SnC2O4 precursor to the calcination temperature (500 °C) using a conventional furnace, the 90% response time to 30 ppm CO (t90%(air-to-CO)) was 76 s at a sensing temperature of 450 °C. However, the t90%(air-to-CO) decreased markedly down to 5-27 s when the precursor was heated rapidly (heating rate: 25-100 °C/min) using a microwave furnace. The significant shortening of the response time was attributed to the formation of a mesoporous structure in the SnO2 acicular particles due to rapid gas evolution during the decomposition of the SnC2O4 precursor.",

keywords = "Gas Sensors, Mesoporous structure, Microwave calcination, Response time, SnO acicular particles",

author = "Cho, {Pyeong Seok} and Kim, {Ki Won} and Lee, {Jong Heun}",

note = "Funding Information: This research was supported in part by a grant from the Core Technology Development Program funded by the Ministry of Commerce, Industry and Energy (MOCIE) and by MIC and IITA through IT Leading R&D Support Project. The authors thank government financial supports. ",

year = "2007",

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language = "English",

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AU - Cho, Pyeong Seok

AU - Kim, Ki Won

AU - Lee, Jong Heun

N1 - Funding Information: This research was supported in part by a grant from the Core Technology Development Program funded by the Ministry of Commerce, Industry and Energy (MOCIE) and by MIC and IITA through IT Leading R&D Support Project. The authors thank government financial supports.

PY - 2007/5/21

Y1 - 2007/5/21

N2 - The CO response time of SnO2 acicular-particle-type gas sensors was shortened to a great extent using rapid microwave calcination. When SnO2 acicular particles were prepared by the slow heating (heating rate: 4.2 °C/min) of a SnC2O4 precursor to the calcination temperature (500 °C) using a conventional furnace, the 90% response time to 30 ppm CO (t90%(air-to-CO)) was 76 s at a sensing temperature of 450 °C. However, the t90%(air-to-CO) decreased markedly down to 5-27 s when the precursor was heated rapidly (heating rate: 25-100 °C/min) using a microwave furnace. The significant shortening of the response time was attributed to the formation of a mesoporous structure in the SnO2 acicular particles due to rapid gas evolution during the decomposition of the SnC2O4 precursor.

AB - The CO response time of SnO2 acicular-particle-type gas sensors was shortened to a great extent using rapid microwave calcination. When SnO2 acicular particles were prepared by the slow heating (heating rate: 4.2 °C/min) of a SnC2O4 precursor to the calcination temperature (500 °C) using a conventional furnace, the 90% response time to 30 ppm CO (t90%(air-to-CO)) was 76 s at a sensing temperature of 450 °C. However, the t90%(air-to-CO) decreased markedly down to 5-27 s when the precursor was heated rapidly (heating rate: 25-100 °C/min) using a microwave furnace. The significant shortening of the response time was attributed to the formation of a mesoporous structure in the SnO2 acicular particles due to rapid gas evolution during the decomposition of the SnC2O4 precursor.

KW - Gas Sensors

KW - Mesoporous structure

KW - Microwave calcination

KW - Response time

KW - SnO acicular particles

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