A Novel Highly Sensitive NO2 Sensor Based on Perovskite Na0.5+xBi0.5TiO3−δ Electrolyte
Abstract NOx is one of dangerous air pollutants, and the demands for reliable sensors to detect NOx are extremely urgent recently. Conventional fluorite-phase YSZ used for NOx sensor requires higher operating temperature to obtain desirable oxygen ion conductivity. In this work, perovskite-phase Na0...
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2017-07-01
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Online Access: | https://doi.org/10.1038/s41598-017-05169-4 |
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doaj-304036fe03234e0897f5d23bec89a5842020-12-08T00:17:05ZengNature Publishing GroupScientific Reports2045-23222017-07-017111010.1038/s41598-017-05169-4A Novel Highly Sensitive NO2 Sensor Based on Perovskite Na0.5+xBi0.5TiO3−δ ElectrolyteYihong Xiao0Chufan Zhang1Xu Zhang2Guohui Cai3Yong Zheng4Ying Zheng5Fulan Zhong6Lilong Jiang7National Engineering Research Center of Chemical Fertilizer Catalyst (NERC-CFC), School of Chemical Engineering, Fuzhou UniversityNational Engineering Research Center of Chemical Fertilizer Catalyst (NERC-CFC), School of Chemical Engineering, Fuzhou UniversityNational Engineering Research Center of Chemical Fertilizer Catalyst (NERC-CFC), School of Chemical Engineering, Fuzhou UniversityNational Engineering Research Center of Chemical Fertilizer Catalyst (NERC-CFC), School of Chemical Engineering, Fuzhou UniversityNational Engineering Research Center of Chemical Fertilizer Catalyst (NERC-CFC), School of Chemical Engineering, Fuzhou UniversityCollege of Chemistry and Materials Science, Fujian Normal UniversityNational Engineering Research Center of Chemical Fertilizer Catalyst (NERC-CFC), School of Chemical Engineering, Fuzhou UniversityNational Engineering Research Center of Chemical Fertilizer Catalyst (NERC-CFC), School of Chemical Engineering, Fuzhou UniversityAbstract NOx is one of dangerous air pollutants, and the demands for reliable sensors to detect NOx are extremely urgent recently. Conventional fluorite-phase YSZ used for NOx sensor requires higher operating temperature to obtain desirable oxygen ion conductivity. In this work, perovskite-phase Na0.5Bi0.5TiO3 (NBT) oxygen conductor was chosen as the solid electrolyte to fabricate a novel highly sensitive NO2 sensor with CuO as the sensing electrode and Pt as reference electrode. Na dopped Na0.5Bi0.5TiO3 greatly improved the sensing performance of this sensor. The optimal sensor based on Na0.51Bi0.50TiO3−δ exhibited good response-recovery characteristics to NO2 and the response current values were almost linear to NO2 concentrations in the range of 50–500 ppm at 400–600 °C. The response current value towards NO2 reached maximum 11.23 μA at 575 °C and the value on NO2 is much higher than other gases (CH4, C2H4, C3H6, C3H8, CO), indicating good selectivity for detecting NO2. The response signals of the sensor were slightly affected by coexistent O2 varying from 2 to 21 vol% at 575 °C. The response current value decreased only 4.9% over 2 months, exhibiting the potential application in motor vehicles.https://doi.org/10.1038/s41598-017-05169-4 |
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DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yihong Xiao Chufan Zhang Xu Zhang Guohui Cai Yong Zheng Ying Zheng Fulan Zhong Lilong Jiang |
spellingShingle |
Yihong Xiao Chufan Zhang Xu Zhang Guohui Cai Yong Zheng Ying Zheng Fulan Zhong Lilong Jiang A Novel Highly Sensitive NO2 Sensor Based on Perovskite Na0.5+xBi0.5TiO3−δ Electrolyte Scientific Reports |
author_facet |
Yihong Xiao Chufan Zhang Xu Zhang Guohui Cai Yong Zheng Ying Zheng Fulan Zhong Lilong Jiang |
author_sort |
Yihong Xiao |
title |
A Novel Highly Sensitive NO2 Sensor Based on Perovskite Na0.5+xBi0.5TiO3−δ Electrolyte |
title_short |
A Novel Highly Sensitive NO2 Sensor Based on Perovskite Na0.5+xBi0.5TiO3−δ Electrolyte |
title_full |
A Novel Highly Sensitive NO2 Sensor Based on Perovskite Na0.5+xBi0.5TiO3−δ Electrolyte |
title_fullStr |
A Novel Highly Sensitive NO2 Sensor Based on Perovskite Na0.5+xBi0.5TiO3−δ Electrolyte |
title_full_unstemmed |
A Novel Highly Sensitive NO2 Sensor Based on Perovskite Na0.5+xBi0.5TiO3−δ Electrolyte |
title_sort |
novel highly sensitive no2 sensor based on perovskite na0.5+xbi0.5tio3−δ electrolyte |
publisher |
Nature Publishing Group |
series |
Scientific Reports |
issn |
2045-2322 |
publishDate |
2017-07-01 |
description |
Abstract NOx is one of dangerous air pollutants, and the demands for reliable sensors to detect NOx are extremely urgent recently. Conventional fluorite-phase YSZ used for NOx sensor requires higher operating temperature to obtain desirable oxygen ion conductivity. In this work, perovskite-phase Na0.5Bi0.5TiO3 (NBT) oxygen conductor was chosen as the solid electrolyte to fabricate a novel highly sensitive NO2 sensor with CuO as the sensing electrode and Pt as reference electrode. Na dopped Na0.5Bi0.5TiO3 greatly improved the sensing performance of this sensor. The optimal sensor based on Na0.51Bi0.50TiO3−δ exhibited good response-recovery characteristics to NO2 and the response current values were almost linear to NO2 concentrations in the range of 50–500 ppm at 400–600 °C. The response current value towards NO2 reached maximum 11.23 μA at 575 °C and the value on NO2 is much higher than other gases (CH4, C2H4, C3H6, C3H8, CO), indicating good selectivity for detecting NO2. The response signals of the sensor were slightly affected by coexistent O2 varying from 2 to 21 vol% at 575 °C. The response current value decreased only 4.9% over 2 months, exhibiting the potential application in motor vehicles. |
url |
https://doi.org/10.1038/s41598-017-05169-4 |
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