Abstract
Quantum size ZnO crystals have been synthesized successfully by a room temperature sol-gel process using oleic acid (OA) as capping agent to control the particle size. The particle size and structure of ZnO nanocrystals have been charactirized by X-ray diffraction (XRD), transmission electron microscope (TEM) and Raman spectra analysis methods. The sensor based on ZnO powder calcined at 400 °C for 1 h exhibits the highest response of 280 to NO 2 and the selectivity to CO and CH 4 at the same concentration reaches 31 and 49 at operating temperature of 290°C. The effect of calcination temperature on the performance of gas sensing has also been studied.
Original language | English |
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Article number | 5999684 |
Pages (from-to) | 1122-1126 |
Number of pages | 5 |
Journal | IEEE Sensors Journal |
Volume | 12 |
Issue number | 5 |
DOIs | |
State | Published - 2012 |
Keywords
- NO
- quantum size
- sensing property
- ZnO