Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 303, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2019.127115
Keywords
Functionalized MWCNTs; Polymer composites; CO2 gas sensing; Chemiresistive sensor; Sensitivity
Funding
- Science and Engineering Research Board-Department of Science and Technology, Govt. of India
Ask authors/readers for more resources
This work presents polymer composite based chemiresistive type carbon dioxide (CO2) gas sensors using different degree of sulfonated poly (ether ether ketone) (SPEEK) incorporated with diethanolamine (DEA)-functionalized multi-wall carbon nanotubes (d-MWCNTs) where incorporation of secondary amide functionalized MWCNTs improves the sensing capability by enhancing the electrical conductivity of the prepared composites. The sensors were fabricated using drop casting method on glass strips. The interaction mechanism mainly depends on the charge transportation between CO2 gas molecules and amide functionalized MWCNTs (d-MWCNTs). In addition, formation of bicarbonate ions (HCO3-) during interaction enhances the sensor sensitivity in different relative humidity. In sensing properties, SPEEK-5/d-MWCNTs (degree of sulfonation, i.e., DS = 71.03%) based sensor shows highest sensitivities (4.09 x 10(-3)-7.58 x 10(-3) % ppm(-1)) for the entire gas sensing measurement (500-5000 ppm) under different relative humidity (30-70% RH) at room temperature. The obtained results indicate that fabricated sensors are capable to detect CO2 gas in different humid conditions.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available