Oxygen adsorption on ZrO2-loaded SnO2 gas sensors in humid atmosphere
Oxygen adsorption on ZrO2-loaded SnO2 gas sensors in humid atmosphere
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DOI：
10.1007/s10853-018-3020-y
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发表时间：
2018-10
影响因子：
4.5
通讯作者：
K. Suematsu;Hotaka Uchino;Takaharu Mizukami;Ken Watanabe;K. Shimanoe
中科院分区：
文献类型：
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作者：
K. Suematsu;Hotaka Uchino;Takaharu Mizukami;Ken Watanabe;K. Shimanoe
在潮湿大气环境中，基于sno2的电阻式气体传感器的气体传感中，氧在颗粒表面的吸附起着关键作用。在本研究中，我们在sno2表面添加极少量的zro2来激活氧气吸附，增强sno2基气体传感器在潮湿大气中的传感器响应。根据测量电阻的变化，我们评估了传感器在潮湿大气中对200 ppm h2o2（96%）的氧吸附性能和响应。少量负载（0.033 mol%）的ZrO2激活了O−和O2−离子的吸附，得到的ZrO2 - sno2复合纳米粒子处于深度电子耗尽状态。这导致zro2 - sno2在潮湿大气中对h22的高传感器响应。结果表明，使用极少量的zro2进行表面改性可以有效地改善潮湿大气中sno2基气体传感器的响应。
Oxygen adsorption on the surface of particles plays a key role in gas sensing for SnO2-based resistive-type gas sensors in a humid atmosphere. In this study, we added an extremely small amount of ZrO2on the SnO2surface to activate oxygen adsorption and enhance the sensor response of a SnO2-based gas sensor in a humid atmosphere. We evaluated the oxygen adsorption properties and sensor response to 200 ppm H2in a humid atmosphere (96%) based on variations in the measured electrical resistance. The adsorption of O−and O2−ions was activated by a small loading (0.033 mol%) of ZrO2, and the resulting ZrO2–SnO2composite nanoparticles were in the deep electron-depleted state. This led to a high sensor response of ZrO2–SnO2to H2in a humid atmosphere. The results demonstrate that surface modification using an extremely small amount of ZrO2was effective in improving the response of a SnO2-based gas sensor in a humid atmosphere.