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Sensors 2017, 17(4), 675; doi:10.3390/s17040675

A Formaldehyde Sensor Based on Molecularly-Imprinted Polymer on a TiO2 Nanotube Array

1
ICTEAM, Université catholique de Louvain (UCL), Place du Levant, 3, 1348 Louvain-la-Neuve, Belgium
2
Department of Materials Science, Materia Nova ASBL, 7000 Mons, Belgium
3
Materials Science Department, University of Mons, 7000 Mons, Belgium
*
Author to whom correspondence should be addressed.
Received: 16 February 2017 / Revised: 20 March 2017 / Accepted: 22 March 2017 / Published: 24 March 2017
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Abstract

Today, significant attention has been brought to the development of sensitive, specific, cheap, and reliable sensors for real-time monitoring. Molecular imprinting technology is a versatile and promising technology for practical applications in many areas, particularly chemical sensors. Here, we present a chemical sensor for detecting formaldehyde, a toxic common indoor pollutant gas. Polypyrrole-based molecularly-imprinted polymer (PPy-based MIP) is employed as the sensing recognition layer and synthesized on a titanium dioxide nanotube array (TiO2-NTA) for increasing its surface-to-volume ratio, thereby improving the sensor performance. Our sensor selectively detects formaldehyde in the parts per million (ppm) range at room temperature. It also shows a long-term stability and small fluctuation to humidity variations. These are attributed to the thin fishnet-like structure of the PPy-based MIP on the highly-ordered and vertically-aligned TiO2-NTA. View Full-Text
Keywords: formaldehyde sensor; molecularly-imprinted polypyrrole; titanium dioxide nanotube array; humidity influence formaldehyde sensor; molecularly-imprinted polypyrrole; titanium dioxide nanotube array; humidity influence
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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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Tang, X.; Raskin, J.-P.; Lahem, D.; Krumpmann, A.; Decroly, A.; Debliquy, M. A Formaldehyde Sensor Based on Molecularly-Imprinted Polymer on a TiO2 Nanotube Array. Sensors 2017, 17, 675.

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