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The Investigation of Quartz Crystal Microbalance (QCM) Formaldehyde Sensors Based on PEI-MWCNTs Composites

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Abstract:

The detection of formaldehyde is very necessary and important in both industrial and residential environments. In this paper, a novel quartz crystal microbalances (QCM) formaldehyde gas sensor has been successful fabricated based on Polyethylenimine (PEI)-multi-walled carbon nanotubes (MWCNTs) composite films by the spraying process. The morphology of films was analyzed by scanning electron microscope (SEM), and formaldehyde-sensing properties of sensors were investigated. The results showed that the prepared QCM gas sensor exhibited good response and recovery behaviors towards formaldehyde gas in the concentration range of 0-10 ppm at room temperature, which also has the superior repeatability and selectivity. Moreover, the gas-sensing mechanism of sensors was studied.

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Periodical:

Advanced Materials Research (Volumes 1030-1032)

Pages:

217-222

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1030-1032.217

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Online since:

September 2014

Authors:

Ying Fei He, Ya Dong Jiang, Hui Ling Tai*, Guang Zhong Xie

Keywords:

Formaldehyde (HCHO), Gas Sensor, MWCNTs, PEI, QCM

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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