Synthesis of Co-doped SnO₂ nanofibers and their enhanced gas-sensing properties

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• 作者：Xueying KouAuthor Vitae ; Chong WangAuthor Vitae ; Mengdi DingAuthor Vitae ; Changhao FengAuthor Vitae ; Xin LiAuthor Vitae ; Jian MaAuthor Vitae ; Hong ZhangAuthor Vitae ; Yanfeng Sun ; ^{syf@jlu.edu.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Geyu LuAuthor Vitae
• 关键词：Co-doped SnO2 nanofibers ; Electrospinning ; Hot pressing ; Ethanol sensor
• 刊名：Sensors & Actuators: B. Chemical
• 出版年：2016
• 出版时间：29 November 2016
• 年：2016
• 卷：236
• 期：Complete
• 页码：425-432
• 全文大小：2366 K

文摘

In this work, pure and 1–5 mol% Co-doped SnO₂ nanofibers were synthesized via an electrospinning method. The morphological and microstructural properties of these nanofibers were obviously changed and the grain size of the SnO₂ nanocrystal were greatly decreased by Co doping. Sensors based on these nanofibers were fabricated after a hot pressing process on the ceramic plates. The gas-sensing properties of pure and Co-doped SnO₂ nanofibers were tested to several kinds of Volatile Organic Compounds (VOCs). The results indicated that among all the samples (0, 1, 3 and 5 mol% Co-doped SnO₂ nanofibers), 3 mol% Co-doped SnO₂ nanofibers showed the highest response toward 100 ppm ethanol, having a response of 40.1, which was over 4 times higher than pure SnO₂ nanofibers. At the same time, the sensors based on 3 mol% Co-doped SnO₂ nanofibers also exhibited good repeatability and long term stability, which were promising for designing ethanol gas sensor with high performance.