High sensing properties of Ce-doped 伪-Fe₂O₃ nanotubes to acetone

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• 作者：Changbai Liu ; Hao Shan ; Li Liu ; Shouchun Li ; Haiying Li
• 关键词：Acetone ; 伪-Fe2O3 ; Ce ; Gas sensor ; Nanotubes
• 刊名：Ceramics International
• 出版年：January, 2014
• 年：2014
• 卷：40
• 期：1_part_PB
• 页码：2395-2399
• 全文大小：1184 K

文摘

Pristine and Ce-doped (3, 4, 5 at% Ce) 伪-Fe₂O₃ nanotubes were synthesized by electrospinning method. The morphologies and structures of these samples were characterized by scanning electron microscope (SEM) and X-ray powder diffraction (XRD). The gas sensing properties of the four samples were investigated. The results showed that the sensitivity of the 4 at% Ce-doped 伪-Fe₂O₃ nanotubes reached 21.5-50 ppm acetone at 240 掳C, which was about 8.3 times larger than that of pure 伪-Fe₂O₃ nanotubes. Meantime, the response and recovery times were about 3 and 8 s, respectively. The sensitivity of the lowest detecting limit to 1 ppm acetone was about 3. Moreover, the sensor also possessed the good selectivity and long-term stability to acetone.