Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 438477
Title Carbon dioxide sensing with sulfonated polyaniline
Author(s) Doan, D.C.T.; Ramaneti, R.; Baggerman, J.; Bent, J. van der; Marcelis, A.T.M.; Tong, H.D.; Rijn, C.J.M. van
Source Sensors and Actuators B: Chemical 168 (2012). - ISSN 0925-4005 - p. 123 - 130.
Department(s) Laboratory for Organic Chemistry
Flower Bulbs
Publication type Refereed Article in a scientific journal
Publication year 2012
Keyword(s) emeraldine base polyaniline - self-doped polyanilines - conducting polymers - gas sensors - composite film - co2 sensor - impedance spectroscopy - poly(vinyl alcohol) - aqueous-solutions - chemical sensors
Abstract The use of polyaniline and especially sulfonated polyaniline (SPAN) is explored for sensing carbon dioxide (CO2) at room temperature. Frequency-dependent AC measurements were carried out to detect changes in impedance of the polymer, drop casted on interdigitated electrodes, when exposed to CO2 gas. Aqueous pH buffers were first used to study pH-dependent conductivity to identify a good candidate polymer for CO2 sensing. Emeraldine-base polyaniline exhibits only a significant conductivity change below pH 4 whereas SPAN shows also a conductivity change between pH 4 and 7. This makes SPAN more suitable for CO2 sensing than emeraldine-base polyaniline. The impedance of SPAN films is found to decrease when exposed to CO2 concentrations above 20,000 ppm. Blending SPAN with polyvinyl alcohol further increases the sensitivity for CO2
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