Rapid and Stable Detection of Carbon Monoxide in Changing Humidity Atmospheres Using Clustered In2O3/CuO Nanospheres
Rapid and Stable Detection of Carbon Monoxide in Changing Humidity Atmospheres Using Clustered In2O3/CuO Nanospheres
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使用簇状 In2O3/CuO 纳米球快速稳定地检测湿度变化的大气中的一氧化碳
DOI：
10.1021/acssensors.9b02557
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发表时间：
2020
期刊：
影响因子：
8.9
通讯作者：
Kengo Shimanoe
中科院分区：
文献类型：
--
作者：
Yongjiao Sun;Zhenting Zhao;Koichi Suematsu;Pengwei Li;Zhichao Yu;Wendong Zhang;Jie Hu;Kengo Shimanoe
成功合成了不同CuO含量的氧化铟/氧化铜（In 2 O3/CuO）纳米球作为一氧化碳（CO）传感材料。采用X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和X射线光电子能谱（XPS）对样品的组成和形貌进行了表征。在不同的温度和湿度条件下，研究了In 2 O3和In 2 O3/CuO纳米球的CO气敏性能。结果表明，在200 °C、25%相对湿度（RH）条件下，基于2mol%In2O3/CuO（InCu 2）的传感器对CO的响应比In 2 O3的传感器提高了3倍，具有响应和恢复时间快、线性范围宽、检测限低等特点。此外，尽管湿度变化范围从25%到95% RH，但它显示出微小的电阻和响应下降。同时，对InCu 2气敏性能和抗湿性能的增强机理进行了系统的研究。我们推测，大部分的水驱动的物种主要是由CuO吸附，由于其高亲和力的羟基，抑制水分和In 2 O3之间的相互作用。InCu 2是一种新型的、有前途的材料，可以以高灵敏度和快速的方式感测CO，并且环境湿度的干扰可以忽略不计。
Clustered indium oxide/copper oxide (In2O3/CuO) nanospheres with different CuO amounts were successfully synthesized as sensing materials for the carbon monoxide (CO) detection. Component and morphological characterizations were performed by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). Sensing performance for CO of the clustered In2O3 and In2O3/CuO nanospheres were investigated under different temperatures and humidity conditions. The results show that the sensors based on 2 mol % In2O3/CuO (InCu2) exhibit about threefold improvement in response to CO compared to that of In2O3 with quick response and recovery time, wide linearity, and low detection limit at 200 °C under 25% relative humidity (RH). Moreover, it shows tiny resistance and response declines despite the wide range of humidity variation from 25 to 95% RH. Meanwhile, the mechanism of enhanced gas-sensing performances and antihumidity properties of InCu2 were systematically investigated. We speculated that most of the water-driven species are predominantly adsorbed by CuO due to its high affinity to the hydroxyl group, which suppresses the interaction between moisture and In2O3. InCu2 is a new and promising material to sense CO in a highly sensitive and fast manner with negligible interference from ambient humidity.