A formaldehyde sensor based on molecularly imprinted polymer on TiO2 nanotubes
(2017) Sensors — Vol. 17, n° 4, p. 675 (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.
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Citations
Tang, X., Raskin, J.-P., Lahem, D., Krumpmann, A., Decroly, A., & Debliquy, M. (2017). A formaldehyde sensor based on molecularly imprinted polymer on TiO2 nanotubes. Sensors, 17(4), 675. https://doi.org/10.3390/s17040675 (Original work published 2017)