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Synthesis and Improved Acetone Sensing Properties of Porous α-Fe2O3 Nanowires.
- Source :
- Chinese Physics Letters; Feb2013, Vol. 30 Issue 2, p1-5, 5p
- Publication Year :
- 2013
-
Abstract
- Porous α-Fe<subscript>2</subscript>O<subscript>3</subscript> nanowires are synthesized by a simple wet chemical method with a precursor of peroxyacetyl nitrate (PAN), and α-Fe<subscript>2</subscript>O<subscript>3</subscript> nanoparticles are also synthesized in the same way except for the addition of PAN. Gas sensors are fabricated by coating the samples on ceramic tubes with Au signal electrodes and Ni-Cr heaters. A sensing investigation reveals that the porous α-Fe<subscript>2</subscript>O<subscript>3</subscript> nanowires have a higher sensitivity compared to α-Fe<subscript>2</subscript>O<subscript>3</subscript> nanoparticles at 260°C. The corresponding sensor response (R<subscript>a</subscript>R<subscript>g</subscript>) is 18.2 at the maximum to 100 ppm acetone, and the response and recovery times are about 8 and 12 s, respectively. The porous and one-dimensional nanostructures of the porous α-Fe<subscript>2</subscript>O<subscript>3</subscript> nanowires benefit for the gas-absorption and electrical-signal-transfer, and thus improve the sensor sensitivity consequentially. [ABSTRACT FROM AUTHOR]
- Subjects :
- ACETONE
NANOWIRES
PEROXYACETYL nitrate
ELECTRODES
GAS absorption & adsorption
Subjects
Details
- Language :
- English
- ISSN :
- 0256307X
- Volume :
- 30
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Chinese Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 86671285
- Full Text :
- https://doi.org/10.1088/0256-307X/30/2/020701