Flame-spray-made undoped zinc oxide films for gas sensing applications
Using zinc naphthenate dissolved in xylene as a precursor undoped ZnO nanopowders were synthesized by the flame spray pyrolysis technique. The average diameter and length of ZnO spherical and hexagonal particles were in the range of 5 to 20 nm, while ZnO nanorods were found to be 5-20 nm wide and 20...
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| Main Authors: | , , , |
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| Format: | Journal |
| Published: |
2018
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| Subjects: | |
| Online Access: | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=77957240454&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/50552 |
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| Institution: | Chiang Mai University |
| Summary: | Using zinc naphthenate dissolved in xylene as a precursor undoped ZnO nanopowders were synthesized by the flame spray pyrolysis technique. The average diameter and length of ZnO spherical and hexagonal particles were in the range of 5 to 20 nm, while ZnO nanorods were found to be 5-20 nm wide and 20-40 nm long, under 5/5 (precursor/oxygen) flame conditions. The gas sensitivity of the undoped ZnO nanopowders towards 50 ppm of NO2, C2H5OH and SO2were found to be 33, 7 and 3, respectively. The sensors showed a great selectivity towards NO2at high working temperature (at 300 °C), while small resistance variations were observed for C2H5OH and SO2, respectively. © 2010 by the authors. |
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