Carbon dioxide detection with polyethylenimine blended with polyelectrolytes

T.C.D. Doan, J. Baggerman, R. Ramaneti, H.D. Tong, A.T.M. Marcelis, C.J.M. van Rijn

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

Branched polyethylenimine (PEI) is studied for use as a chemiresistor for detection of carbon dioxide(CO2) at room temperature. The DC and AC measurements of drop-coated PEI films on interdigitated electrodes revealed a noticeable decrease in conductivity upon exposure to CO2 (400–2000 ppm) underhigh humidity (>60% RH) at room temperature. The increased resistance/impedance is attributed to the formation of carbamates and bicarbonates at amine sites of the PEI chain in the presence of CO2 and water. The response with increasing CO2 concentration followed a Langmuir isotherm, indicating that the response can be attributed to an adsorption process. The conductivity is also found to be larger at higher humidity. Blending of PEI with the polyelectrolytes yielded a higher sensitivity for the blend with Nafion sodium salt and shorter recovery times for both blends with Nafion sodium salt and poly(sodium4-styrenesulfonate) in comparison with PEI. The improved sensitivity of the PEI blend opens possibilities of using these blends in CO2 sensors for greenhouses and offices.
LanguageEnglish
Pages452-459
Number of pages8
JournalSensors and Actuators B: Chemical
Volume201
DOIs
Publication statusPublished - 2014

Fingerprint

Polyethyleneimine
Polyelectrolytes
Carbon Dioxide
carbon dioxide
Atmospheric humidity
Carbon dioxide
Sodium
Salts
Greenhouses
Isotherms
humidity
Amines
sodium
salts
Adsorption
Recovery
conductivity
Temperature
Electrodes
sensitivity

Keywords

  • conducting polymer interaction
  • sulfonated polyaniline
  • gaseous substances
  • room-temperature
  • chemical sensors
  • sensing layers
  • co2 capture
  • gas sensors
  • water
  • hydrogen

Cite this

Doan, T.C.D. ; Baggerman, J. ; Ramaneti, R. ; Tong, H.D. ; Marcelis, A.T.M. ; van Rijn, C.J.M. / Carbon dioxide detection with polyethylenimine blended with polyelectrolytes. In: Sensors and Actuators B: Chemical. 2014 ; Vol. 201. pp. 452-459.
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Carbon dioxide detection with polyethylenimine blended with polyelectrolytes. / Doan, T.C.D.; Baggerman, J.; Ramaneti, R.; Tong, H.D.; Marcelis, A.T.M.; van Rijn, C.J.M.

In: Sensors and Actuators B: Chemical, Vol. 201, 2014, p. 452-459.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Carbon dioxide detection with polyethylenimine blended with polyelectrolytes

AU - Doan, T.C.D.

AU - Baggerman, J.

AU - Ramaneti, R.

AU - Tong, H.D.

AU - Marcelis, A.T.M.

AU - van Rijn, C.J.M.

PY - 2014

Y1 - 2014

N2 - Branched polyethylenimine (PEI) is studied for use as a chemiresistor for detection of carbon dioxide(CO2) at room temperature. The DC and AC measurements of drop-coated PEI films on interdigitated electrodes revealed a noticeable decrease in conductivity upon exposure to CO2 (400–2000 ppm) underhigh humidity (>60% RH) at room temperature. The increased resistance/impedance is attributed to the formation of carbamates and bicarbonates at amine sites of the PEI chain in the presence of CO2 and water. The response with increasing CO2 concentration followed a Langmuir isotherm, indicating that the response can be attributed to an adsorption process. The conductivity is also found to be larger at higher humidity. Blending of PEI with the polyelectrolytes yielded a higher sensitivity for the blend with Nafion sodium salt and shorter recovery times for both blends with Nafion sodium salt and poly(sodium4-styrenesulfonate) in comparison with PEI. The improved sensitivity of the PEI blend opens possibilities of using these blends in CO2 sensors for greenhouses and offices.

AB - Branched polyethylenimine (PEI) is studied for use as a chemiresistor for detection of carbon dioxide(CO2) at room temperature. The DC and AC measurements of drop-coated PEI films on interdigitated electrodes revealed a noticeable decrease in conductivity upon exposure to CO2 (400–2000 ppm) underhigh humidity (>60% RH) at room temperature. The increased resistance/impedance is attributed to the formation of carbamates and bicarbonates at amine sites of the PEI chain in the presence of CO2 and water. The response with increasing CO2 concentration followed a Langmuir isotherm, indicating that the response can be attributed to an adsorption process. The conductivity is also found to be larger at higher humidity. Blending of PEI with the polyelectrolytes yielded a higher sensitivity for the blend with Nafion sodium salt and shorter recovery times for both blends with Nafion sodium salt and poly(sodium4-styrenesulfonate) in comparison with PEI. The improved sensitivity of the PEI blend opens possibilities of using these blends in CO2 sensors for greenhouses and offices.

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KW - sulfonated polyaniline

KW - gaseous substances

KW - room-temperature

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KW - sensing layers

KW - co2 capture

KW - gas sensors

KW - water

KW - hydrogen

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JO - Sensors and Actuators B: Chemical

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