中国物理B ›› 2015, Vol. 24 ›› Issue (11): 118501-118501.doi: 10.1088/1674-1056/24/11/118501

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Excellent ethanol sensing properties based on Er2O3-Fe2O3 nanotubes

刘唱白a, 何滢b, 王圣蕾a   

  1. a College of Electronic Science & Engineering, Jilin University, Changchun 130012, China;
    b College of Instrumentation & Electrical Engineering, Jilin University, Changchun 130012, China
  • 收稿日期:2015-04-09 修回日期:2015-06-19 出版日期:2015-11-05 发布日期:2015-11-05
  • 通讯作者: Liu Chang-Bai E-mail:liwei99@jlu.edu.cn
  • 基金资助:

    Project supported by Jilin Provincial Science and Technology Department, China (Grant No. 20140204027GX) and the Challenge Cup for College Students, China (Grant No. 450060497053).

Excellent ethanol sensing properties based on Er2O3-Fe2O3 nanotubes

Liu Chang-Bai (刘唱白)a, He Ying (何滢)b, Wang Sheng-Lei (王圣蕾)a   

  1. a College of Electronic Science & Engineering, Jilin University, Changchun 130012, China;
    b College of Instrumentation & Electrical Engineering, Jilin University, Changchun 130012, China
  • Received:2015-04-09 Revised:2015-06-19 Online:2015-11-05 Published:2015-11-05
  • Contact: Liu Chang-Bai E-mail:liwei99@jlu.edu.cn
  • Supported by:

    Project supported by Jilin Provincial Science and Technology Department, China (Grant No. 20140204027GX) and the Challenge Cup for College Students, China (Grant No. 450060497053).

摘要:

In this work, pure α-Fe2O3 and Er2O3-Fe2O3 nanotubes were synthesized by a simple single-capillary electrospinning technology followed by calcination treatment. The morphologies and crystal structures of the as-prepared samples were characterized by scanning electron microscopy and x-ray diffraction, respectively. The gas-sensing properties of the as-prepared samples have been researched, and the result shows that the Er2O3-Fe2O3 nanotubes exhibit much better sensitivity to ethanol. The response value of Er2O3-Fe2O3 nanotubes to 10 ppm ethanol is 21 at the operating temperature 240°, which is 14 times larger than that of pure α-Fe2O3 nanotubes (response value is 1.5). The ethanol sensing properties of α-Fe2O3 nanotubes are remarkably enhanced by doping Er, and the lowest detection limit of Er2O3-Fe2O3 nanotubes is 300 ppb, to which the response value is about 2. The response and recovery times are about 4 s and 70 s to 10 ppm ethanol, respectively. In addition, the Er2O3-Fe2O3 nanotubes possess good selectivity and long-term stability.

关键词: Er2O3, α-Fe2O3 nanotubes, ethanol, gas sensing

Abstract:

In this work, pure α-Fe2O3 and Er2O3-Fe2O3 nanotubes were synthesized by a simple single-capillary electrospinning technology followed by calcination treatment. The morphologies and crystal structures of the as-prepared samples were characterized by scanning electron microscopy and x-ray diffraction, respectively. The gas-sensing properties of the as-prepared samples have been researched, and the result shows that the Er2O3-Fe2O3 nanotubes exhibit much better sensitivity to ethanol. The response value of Er2O3-Fe2O3 nanotubes to 10 ppm ethanol is 21 at the operating temperature 240°, which is 14 times larger than that of pure α-Fe2O3 nanotubes (response value is 1.5). The ethanol sensing properties of α-Fe2O3 nanotubes are remarkably enhanced by doping Er, and the lowest detection limit of Er2O3-Fe2O3 nanotubes is 300 ppb, to which the response value is about 2. The response and recovery times are about 4 s and 70 s to 10 ppm ethanol, respectively. In addition, the Er2O3-Fe2O3 nanotubes possess good selectivity and long-term stability.

Key words: Er2O3, α-Fe2O3 nanotubes, ethanol, gas sensing

中图分类号:  (Micro- and nano-electromechanical systems (MEMS/NEMS) and devices)

  • 85.85.+j
85.35.-p (Nanoelectronic devices) 81.07.-b (Nanoscale materials and structures: fabrication and characterization)