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Sensors 2015, 15(11), 28502-28512; doi:10.3390/s151128502

Acetone Sensing Properties of a Gas Sensor Composed of Carbon Nanotubes Doped With Iron Oxide Nanopowder

1,2,* , 1,2
,
1,2,* , 1,2,* and 1,2
1
Key Laboratory of Instrumentation Science & Dynamic Measurement, Ministry of Education, North University of China, Taiyuan 030051, China
2
Science and Technology on Electronic Test & Measurement Laboratory, North University of China, Taiyuan 030051, China
*
Authors to whom correspondence should be addressed.
Academic Editor: W. Rudolf Seitz
Received: 14 September 2015 / Revised: 26 October 2015 / Accepted: 29 October 2015 / Published: 11 November 2015
(This article belongs to the Section Chemical Sensors)
View Full-Text   |   Download PDF [6182 KB, uploaded 11 November 2015]   |  

Abstract

Iron oxide (Fe2O3) nanopowder was prepared by a precipitation method and then mixed with different proportions of carbon nanotubes. The composite materials were characterized by X-ray powder diffraction, Fourier transform infrared spectroscopy and scanning electron microscopy. A fabricated heater-type gas sensor was compared with a pure Fe2O3 gas sensor under the influence of acetone. The effects of the amount of doping, the sintering temperature, and the operating temperature on the response of the sensor and the response recovery time were analyzed. Experiments show that doping of carbon nanotubes with iron oxide effectively improves the response of the resulting gas sensors to acetone gas. It also reduces the operating temperature and shortens the response recovery time of the sensor. The response of the sensor in an acetone gas concentration of 80 ppm was enhanced, with good repeatability. View Full-Text
Keywords: carbon nanotubes; Fe2O3; gas sensor; acetone carbon nanotubes; Fe2O3; gas sensor; acetone
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Tan, Q.; Fang, J.; Liu, W.; Xiong, J.; Zhang, W. Acetone Sensing Properties of a Gas Sensor Composed of Carbon Nanotubes Doped With Iron Oxide Nanopowder. Sensors 2015, 15, 28502-28512.

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