Acetone-sensing properties of doped ZnO nanoparticles for breath-analyzer applications
| Autor: | Hyun Jun Rim, Sungmee Cho, Ran Yoo, Wooyoung Lee, Hyun Sook Lee, Yunji Park, Hwaebong Jung |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Photoluminescence Dopant Mechanical Engineering Doping Metals and Alloys chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Oxygen 0104 chemical sciences Breath analyzer chemistry.chemical_compound Zno nanoparticles chemistry Chemical engineering Mechanics of Materials Materials Chemistry Acetone Gas chromatography 0210 nano-technology |
| Zdroj: | Journal of Alloys and Compounds. 803:135-144 |
| ISSN: | 0925-8388 |
| Popis: | We report the effects of various dopants (Al, Co, and Cu) on the acetone-sensing properties of ZnO nanoparticles (NPs) for breath-analyzer applications. Among the different sensing materials, the Al-doped ZnO NPs exhibited the highest sensitivity toward 1 ppm acetone, with a maximum response of 11.8 at 500 °C. This improved sensing performance was related to deep donor-level defects caused by double oxygen vacancies in the Al-doped ZnO NPs, as confirmed by photoluminescence spectra. Thus, Al was a more effective dopant than Cu and Co for enhancing the sensing properties of ZnO NPs for the detection of acetone. We achieved selective detection of 0.5 ppm acetone in air using the Al-doped ZnO NPs incorporated into a miniaturized gas chromatograph (GC). The results indicate that the miniaturized GC integrated with the Al-doped ZnO NPs can be utilized for an acetone breath analyzer. |
| Databáze: | OpenAIRE |
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