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 journalArticle

20 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 (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.

Original languageEnglish
Pages (from-to)1034-1039
Number of pages6
JournalSensors and Actuators, B: Chemical
Volume123
Issue number2
DOIs
Publication statusPublished - 2007 May 21

Fingerprint

Gas dynamics
gas dynamics
Carbon Monoxide
Heating rate
Calcination
roasting
Furnaces
Microwaves
microwaves
heating
furnaces
Air
Chemical sensors
gas evolution
air
Decomposition
Heating
Temperature
Gases
decomposition

Keywords

  • Gas Sensors
  • Mesoporous structure
  • Microwave calcination
  • Response time
  • SnO acicular particles

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry
  • Electrical and Electronic Engineering

Cite this

Improvement of dynamic gas sensing behavior of SnO2 acicular particles by microwave calcination. / Cho, Pyeong Seok; Kim, Ki Won; Lee, Jong Heun.

In: Sensors and Actuators, B: Chemical, Vol. 123, No. 2, 21.05.2007, p. 1034-1039.

Research output: Contribution to journalArticle

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