Alkaline-Earth Metals-Doped Pyrochlore Gd2Zr2O7 as Oxygen Conductors for Improved NO2 Sensing Performance

Abstract This work proposed a novel strategy to fabricate highly-stable NO2 sensor based on a pyrochlore-phase Gd2Zr2O7 oxygen conductor. The incorporation of alkaline-earth metals distinctly enhances the sensing performance of the Gd2Zr2O7 based sensors. The excellent sensor based on Gd1.95Ca0.05Zr...

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Autores principales:	Fulan Zhong, Jiwu Zhao, Lanqian Shi, Yihong Xiao, Guohui Cai, Yong Zheng, Jinlin Long
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6e3611b29271451689d6b180355d1baf
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spelling	oai:doaj.org-article:6e3611b29271451689d6b180355d1baf2021-12-02T12:32:41ZAlkaline-Earth Metals-Doped Pyrochlore Gd2Zr2O7 as Oxygen Conductors for Improved NO2 Sensing Performance10.1038/s41598-017-04920-12045-2322https://doaj.org/article/6e3611b29271451689d6b180355d1baf2017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-04920-1https://doaj.org/toc/2045-2322Abstract This work proposed a novel strategy to fabricate highly-stable NO2 sensor based on a pyrochlore-phase Gd2Zr2O7 oxygen conductor. The incorporation of alkaline-earth metals distinctly enhances the sensing performance of the Gd2Zr2O7 based sensors. The excellent sensor based on Gd1.95Ca0.05Zr2O7+δ exhibits rapid response-recovery characteristics with the maximum response current value (ΔI = 6.4 μA), extremely short 90% responce (3 s) and 90% recovery (35 s) time towards 500 ppm NO2 at 500 °C, which is better than that of commercial YSZ under the same condition. The ΔI value towards NO2 is much higher than those towards other gases (CH4, C3H6, C3H8, CO, NO, SO2, C2H4, CO2 and C2H6), exhibiting excellent selectivity for detecting NO2. The response signal basically maintains a stable value of 6.4 μA after the sensors was stored for half a month and a month. The outstanding selectivity and highly stability of the NO 2 sensors based on Gd2−xMxZr2O7+δ are expected to a promising application in automotive vehicles.Fulan ZhongJiwu ZhaoLanqian ShiYihong XiaoGuohui CaiYong ZhengJinlin LongNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Fulan Zhong Jiwu Zhao Lanqian Shi Yihong Xiao Guohui Cai Yong Zheng Jinlin Long Alkaline-Earth Metals-Doped Pyrochlore Gd2Zr2O7 as Oxygen Conductors for Improved NO2 Sensing Performance
description	Abstract This work proposed a novel strategy to fabricate highly-stable NO2 sensor based on a pyrochlore-phase Gd2Zr2O7 oxygen conductor. The incorporation of alkaline-earth metals distinctly enhances the sensing performance of the Gd2Zr2O7 based sensors. The excellent sensor based on Gd1.95Ca0.05Zr2O7+δ exhibits rapid response-recovery characteristics with the maximum response current value (ΔI = 6.4 μA), extremely short 90% responce (3 s) and 90% recovery (35 s) time towards 500 ppm NO2 at 500 °C, which is better than that of commercial YSZ under the same condition. The ΔI value towards NO2 is much higher than those towards other gases (CH4, C3H6, C3H8, CO, NO, SO2, C2H4, CO2 and C2H6), exhibiting excellent selectivity for detecting NO2. The response signal basically maintains a stable value of 6.4 μA after the sensors was stored for half a month and a month. The outstanding selectivity and highly stability of the NO 2 sensors based on Gd2−xMxZr2O7+δ are expected to a promising application in automotive vehicles.
format	article
author	Fulan Zhong Jiwu Zhao Lanqian Shi Yihong Xiao Guohui Cai Yong Zheng Jinlin Long
author_facet	Fulan Zhong Jiwu Zhao Lanqian Shi Yihong Xiao Guohui Cai Yong Zheng Jinlin Long
author_sort	Fulan Zhong
title	Alkaline-Earth Metals-Doped Pyrochlore Gd2Zr2O7 as Oxygen Conductors for Improved NO2 Sensing Performance
title_short	Alkaline-Earth Metals-Doped Pyrochlore Gd2Zr2O7 as Oxygen Conductors for Improved NO2 Sensing Performance
title_full	Alkaline-Earth Metals-Doped Pyrochlore Gd2Zr2O7 as Oxygen Conductors for Improved NO2 Sensing Performance
title_fullStr	Alkaline-Earth Metals-Doped Pyrochlore Gd2Zr2O7 as Oxygen Conductors for Improved NO2 Sensing Performance
title_full_unstemmed	Alkaline-Earth Metals-Doped Pyrochlore Gd2Zr2O7 as Oxygen Conductors for Improved NO2 Sensing Performance
title_sort	alkaline-earth metals-doped pyrochlore gd2zr2o7 as oxygen conductors for improved no2 sensing performance
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/6e3611b29271451689d6b180355d1baf
work_keys_str_mv	AT fulanzhong alkalineearthmetalsdopedpyrochloregd2zr2o7asoxygenconductorsforimprovedno2sensingperformance AT jiwuzhao alkalineearthmetalsdopedpyrochloregd2zr2o7asoxygenconductorsforimprovedno2sensingperformance AT lanqianshi alkalineearthmetalsdopedpyrochloregd2zr2o7asoxygenconductorsforimprovedno2sensingperformance AT yihongxiao alkalineearthmetalsdopedpyrochloregd2zr2o7asoxygenconductorsforimprovedno2sensingperformance AT guohuicai alkalineearthmetalsdopedpyrochloregd2zr2o7asoxygenconductorsforimprovedno2sensingperformance AT yongzheng alkalineearthmetalsdopedpyrochloregd2zr2o7asoxygenconductorsforimprovedno2sensingperformance AT jinlinlong alkalineearthmetalsdopedpyrochloregd2zr2o7asoxygenconductorsforimprovedno2sensingperformance
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Alkaline-Earth Metals-Doped Pyrochlore Gd2Zr2O7 as Oxygen Conductors for Improved NO2 Sensing Performance

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