Highly efficient rapid ethanol sensing based on In_{2鈭?span style='font-style: italic'>x}Ni_xO₃ nanofibers

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• 作者：Caihui Feng^a&#xA0 ; [Author Vitae] ; Wei Li^a&#xA0 ; [Author Vitae] ; Chao Li^a&#xA0 ; [Author Vitae] ; Linghui Zhu^a ; Haifeng Zhang^a&#xA0 ; [Author Vitae] ; Ying Zhang^a&#xA0 ; [Author Vitae] ; Shengping Ruan^a ; ^{rsp1226@gmail.com}&#xA0 ; [Author Vitae] ; Weiyou Chen^b ; ^{bjuqingqing@gmail.com}&#xA0 ; [Author Vitae] ; Lianxiang Yu^c ; ^{jluhuihui@gmail.com}&#xA0 ; [Author Vitae]
• 关键词：NiO ; In2O3 ; Ethanol sensors ; Nanofibers ; Electrospinning
• 刊名：Sensors and Actuators B ; Chemical
• 出版年：2012
• 期刊代码：161_09254005
• 类别：et
• 出版时间：20 May, 2012
• 卷：166-167
• 期：Complete
• 页码：83-88
• 文件大小：1075 K

摘要

Stable solid solution In_2鈭?em>xNi_xO₃ nanofibers were formed by introducing p-type NiO into n-type In₂O₃ via an electrospinning technique with a subsequent calcination process. The nanofibers were characterized by differential thermal and thermal gravimetric analyzer (DTA-TGA), scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Ethanol sensing properties of the as-prepared nanofibers were investigated in detail. In order to maintain the nanofibers鈥?one-dimensional morphologies in the sensor fabrication, a unique measurement technique was introduced for the first time. The result showed that In_2鈭?em>xNi_xO₃ nanofibers exhibited significantly enhanced sensitivity, good selectivity, fast response and recovery rate (<3&#xA0;s and <2&#xA0;s), and excellent linearity in a relatively wide range of 1-500&#xA0;ppm at a low temperature of 180&#xA0;掳C. These properties make the fabricated nanofibers good candidates for ethanol detection.