Ultrahigh Sensitivity and Excellent Selectivity of Al<sub>2</sub>O<sub>3</sub>-doped ZnO Micro-flowers to Acetone
Pore spaced pure ZnO and Al<sub>2</sub>O<sub>3</sub>-doped ZnO(Al<sub>2</sub>O<sub>3</sub>-ZnO) micro-flowers were successfully synthesized by hydrothermal method. The microstructure, morphology and components were characterized by X-ray diffraction (X...
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doaj-3f198a2eb3964cd69d9f16aad30b84492020-11-24T23:24:09ZzhoJournal of Materials EngineeringJournal of Materials Engineering1001-43811001-43812017-02-01452121610.11868/j.issn.1001-4381.2015.000417201702000417Ultrahigh Sensitivity and Excellent Selectivity of Al<sub>2</sub>O<sub>3</sub>-doped ZnO Micro-flowers to AcetoneLIU Chang-bai0LIU Li1LIU Xing-yi2College of Electronic Science & Engineering, Jilin University, Changchun 130012, China;College of Physics, Jilin University, Changchun 130012, ChinaCollege of Electronic Science & Engineering, Jilin University, Changchun 130012, China;Pore spaced pure ZnO and Al<sub>2</sub>O<sub>3</sub>-doped ZnO(Al<sub>2</sub>O<sub>3</sub>-ZnO) micro-flowers were successfully synthesized by hydrothermal method. The microstructure, morphology and components were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive X-ray spectrometry (EDS), respectively. Gas sensors were made to investigate the gas sensing properties. The results reveal that the sensor based on Al<sub>2</sub>O<sub>3</sub>-ZnO shows a high sensitivity to acetone. The sensitivity is 82.8 to 100×10<sup>-6 </sup>acetone gas at 260℃, which is about 4.6 times larger than that of pure ZnO (18.0) at similar conditions. The response time and recovery time are about 3s and 8s, respectively. Al<sub>2</sub>O<sub>3</sub>-ZnO also shows an excellent selectivity. Its sensitivity to acetone is 3.16 times higher than that to ethanol, which has the highest sensitivity among interfering gases under the same conditions. Thus, Al<sub>2</sub>O<sub>3</sub>-ZnO sensors can successfully distinguish acetone and ethanol with similar properties. In addition, the lowest detection to acetone is about 0.25×10<sup>-6</sup> with theresponse is about 3.1.http://jme.biam.ac.cn/CN/Y2017/V45/I2/12hydrothermal methodacetoneAl<sub>2</sub>O<sub>3</sub>-ZnO micro-flowergas sensor |
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DOAJ |
language |
zho |
format |
Article |
sources |
DOAJ |
author |
LIU Chang-bai LIU Li LIU Xing-yi |
spellingShingle |
LIU Chang-bai LIU Li LIU Xing-yi Ultrahigh Sensitivity and Excellent Selectivity of Al<sub>2</sub>O<sub>3</sub>-doped ZnO Micro-flowers to Acetone Journal of Materials Engineering hydrothermal method acetone Al<sub>2</sub>O<sub>3</sub>-ZnO micro-flower gas sensor |
author_facet |
LIU Chang-bai LIU Li LIU Xing-yi |
author_sort |
LIU Chang-bai |
title |
Ultrahigh Sensitivity and Excellent Selectivity of Al<sub>2</sub>O<sub>3</sub>-doped ZnO Micro-flowers to Acetone |
title_short |
Ultrahigh Sensitivity and Excellent Selectivity of Al<sub>2</sub>O<sub>3</sub>-doped ZnO Micro-flowers to Acetone |
title_full |
Ultrahigh Sensitivity and Excellent Selectivity of Al<sub>2</sub>O<sub>3</sub>-doped ZnO Micro-flowers to Acetone |
title_fullStr |
Ultrahigh Sensitivity and Excellent Selectivity of Al<sub>2</sub>O<sub>3</sub>-doped ZnO Micro-flowers to Acetone |
title_full_unstemmed |
Ultrahigh Sensitivity and Excellent Selectivity of Al<sub>2</sub>O<sub>3</sub>-doped ZnO Micro-flowers to Acetone |
title_sort |
ultrahigh sensitivity and excellent selectivity of al<sub>2</sub>o<sub>3</sub>-doped zno micro-flowers to acetone |
publisher |
Journal of Materials Engineering |
series |
Journal of Materials Engineering |
issn |
1001-4381 1001-4381 |
publishDate |
2017-02-01 |
description |
Pore spaced pure ZnO and Al<sub>2</sub>O<sub>3</sub>-doped ZnO(Al<sub>2</sub>O<sub>3</sub>-ZnO) micro-flowers were successfully synthesized by hydrothermal method. The microstructure, morphology and components were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive X-ray spectrometry (EDS), respectively. Gas sensors were made to investigate the gas sensing properties. The results reveal that the sensor based on Al<sub>2</sub>O<sub>3</sub>-ZnO shows a high sensitivity to acetone. The sensitivity is 82.8 to 100×10<sup>-6 </sup>acetone gas at 260℃, which is about 4.6 times larger than that of pure ZnO (18.0) at similar conditions. The response time and recovery time are about 3s and 8s, respectively. Al<sub>2</sub>O<sub>3</sub>-ZnO also shows an excellent selectivity. Its sensitivity to acetone is 3.16 times higher than that to ethanol, which has the highest sensitivity among interfering gases under the same conditions. Thus, Al<sub>2</sub>O<sub>3</sub>-ZnO sensors can successfully distinguish acetone and ethanol with similar properties. In addition, the lowest detection to acetone is about 0.25×10<sup>-6</sup> with theresponse is about 3.1. |
topic |
hydrothermal method acetone Al<sub>2</sub>O<sub>3</sub>-ZnO micro-flower gas sensor |
url |
http://jme.biam.ac.cn/CN/Y2017/V45/I2/12 |
work_keys_str_mv |
AT liuchangbai ultrahighsensitivityandexcellentselectivityofalsub2subosub3subdopedznomicroflowerstoacetone AT liuli ultrahighsensitivityandexcellentselectivityofalsub2subosub3subdopedznomicroflowerstoacetone AT liuxingyi ultrahighsensitivityandexcellentselectivityofalsub2subosub3subdopedznomicroflowerstoacetone |
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