Alkaline-Earth Metals-Doped Pyrochlore Gd(2)Zr(2)O(7) as Oxygen Conductors for Improved NO(2) Sensing Performance.
Alkaline-Earth Metals-Doped Pyrochlore Gd(2)Zr(2)O(7) as Oxygen Conductors for Improved NO(2) Sensing Performance.
复制标题
碱土金属掺杂烧绿石 Gd2Zr2O7 作为氧导体，可改善 NO2 传感性能
DOI：
10.1038/s41598-017-04920-1
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发表时间：
2017-07-05
影响因子：
4.6
通讯作者：
Long J
中科院分区：
文献类型：
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作者：
Zhong F;Zhao J;Shi L;Xiao Y;Cai G;Zheng Y;Long J
提出了一种基于高温超导相Gd2Zr2O7氧导体制备高稳定性NO2传感器的新方法。碱土金属的掺入明显提高了Gd_2Zr_2O_7基传感器的传感性能。在500 °C下，对500 ppm NO2的响应电流最大值（ΔI = 6.4 μA）、90%响应时间（3 s）和90%恢复时间（35 s）均优于同条件下的商品YSZ。对NO2的ΔI值远高于对其它气体（CH4、C3H6、C3H8、CO、NO、SO2、C2H4、CO2和C2H6）的Δ I值，对NO2的检测具有良好的选择性。传感器存放半个月和一个月后，响应信号基本保持在6.4 μA的稳定值。NO的优异选择性和高稳定性
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基于Gd2−xMxZr2O7+δ的传感器
有望在汽车中得到有前景的应用。
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
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sensors based on Gd2−xMxZr2O7+δ
are expected to a promising application in automotive vehicles.