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HomeMaterials Science ForumMaterials Science Forum Vol. 847A Novel Formaldehyde Gas Sensor Based on Ag-LaFeO3...

A Novel Formaldehyde Gas Sensor Based on Ag-LaFeO₃ Using Molecular Imprinting Technique

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Abstract:

A novel gas sensor for the determination of formaldehyde was developed based on molecular imprinting technique (MIT). MIT was for the first time used to recognize small organic molecule by our group. The molecular imprinting nanoparticles (MINs) with a small dimension which possess extremely high surface-to-volume ratio were synthesized using imprinting polymerization with formaldehyde as template and Ag-LaFeO₃ as substrate material. The structure of the MINs is orthogonal perovskite. And then the MINs were printed onto an alumina tube. Subsequently, a high selectivity molecular imprinting gas sensor for detection of formaldehyde was achieved. At 86°C, the response to 0.5 ppm formaldehyde based on the sensor is 16, and the response is lower than 2 for the other test gases. The response time and recovery time are 55 s and 40 s, respectively.

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Periodical:

Materials Science Forum (Volume 847)

Pages:

287-293

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.847.287

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Online since:

March 2016

Authors:

Yu Min Zhang, Chang Yi Hu, Jin Zhang, Qing Ju Liu, Qin Zhu, Zhong Qi Zhu

Keywords:

Ag-LaFeO₃, Gas Sensor, High Selectivity, Small Molecular Imprinting

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© 2016 Trans Tech Publications Ltd. All Rights Reserved

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