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Improvement of dynamic gas sensing behavior of SnO2 acicular particles by microwave calcination
- Source :
-
Sensors & Actuators B: Chemical . May2007, Vol. 123 Issue 2, p1034-1039. 6p. - Publication Year :
- 2007
-
Abstract
- 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 30ppm CO (t 90%(air-to-CO)) was 76s at a sensing temperature of 450°C. However, the t 90%(air-to-CO) decreased markedly down to 5–27s 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. [Copyright &y& Elsevier]
- Subjects :
- *SULFUR dioxide
*NANOPARTICLES
*OXIDATION-reduction reaction
*CHEMICAL detectors
Subjects
Details
- Language :
- English
- ISSN :
- 09254005
- Volume :
- 123
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Sensors & Actuators B: Chemical
- Publication Type :
- Academic Journal
- Accession number :
- 24969824
- Full Text :
- https://doi.org/10.1016/j.snb.2006.11.007