Mixed-potential type NOx sensor using stabilized zirconia and MoO3-In2O3 nanocomposites
Mixed-potential type NOx sensor using stabilized zirconia and MoO3-In2O3 nanocomposites
复制标题
使用稳定氧化锆和MoO3·In2O3纳米复合材料的混合电位型NOx传感器
DOI：
10.1016/j.ceramint.2016.03.243
复制
发表时间：
2016-08-01
影响因子：
5.2
通讯作者：
Lu, Geyu
中科院分区：
文献类型：
--
作者：
Cai, Hao;Sun, Ruize;Lu, Geyu
以氧化钇稳定的氧化锆（YSZ）为电解质，In 2 O3-MoO 3纳米复合电极为电极，制备了高灵敏混合电位型NO2传感器。采用溶胶-凝胶法制备了掺杂2%、5%、10%MoO3的In 2 O3和纯In 2 O3，并将其应用于传感电极（SE）。研究了MoO 3掺杂量对NO2气敏性能的影响。结果发现，使用In 2 O3传感电极掺杂5wt%MoO3的传感器表现出更大的灵敏度，NO2在10-200 ppm的范围内比其他传感器使用In 2 O3掺杂0%，2%和10%MoO3。采用掺杂5%MoO3的In 2 O3敏感电极的传感器在高温下表现出较高的灵敏度（59 mV/decade）、良好的稳定性和可重复性。传感器的电位差（Δ V）在10-200 ppm的检测范围内随NO2浓度几乎线性变化。此外，值得注意的是，相对湿度对500 ℃下NO2灵敏度的影响很小。结合对传感材料的XRD分析、XPS分析、ICP分析以及传感器的修正极化曲线，可以推测MoO 3掺杂到In 2 O3传感电极中对传感性能有显著的影响，并提出了改善传感性能的可能机制。(C)2016 Elsevier Ltd和Techna Group S.r.l. All rights reserved.
Highly sensitive mixed-potential-type NO2 sensors based on yttria-stabilized zirconia (YSZ) electrolyte and In2O3-MoO3 nanocomposite electrode were fabricated. The In2O3 doped with 2%, 5%, 10% MoO3 and pure In2O3 were synthesized by sol-gel method, and these materials were applied to sensing electrode (SE). The effects of doping amount of MoO3 on NO2-sensing properties were investigated. It was found that the sensor using In2O3 sensing electrode doped with 5 wt% MoO3 exhibited larger sensitivity to NO2 in the range of 10-200 ppm than the other sensors using In2O3 doped with 0%, 2% and 10% MoO3. The sensor using In2O3 sensing electrode doped with 5% MoO3 showed high sensitivity (59 mV/decade), good stable and repeatable performance at elevated temperature. The electric potential difference (Delta V) of the sensor varies almost linearly with the NO2 concentrations in the examined range of 10-200 ppm. Moreover, it is noteworthy that the influence of relative humidity on NO2 sensitivities at 500 degrees C is little. Combined with the XRD analysis, XPS analysis, ICP analysis of the sensing materials and modified-polarization curves of the sensors, it could be speculated that the MoO3, doped to the In2O3 sensing electrode, plays a significant role in sensing performance, and a possible mechanism for the improvement of NO2-sensing properties was proposed here. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.