NDLI: High surface area polyaniline nanofiber synthesized in compressed CO$_{2}$ and its application to a hydrogen sensor

Content Provider	Springer Nature Link
Author	Pham, Quoc Minh Kim, Sunwook
Copyright Year	2016
Abstract	High surface area polyaniline (HSA PANI) nanofibers were synthesized through oxidative polymerization of aniline in compressed CO$_{2}$ using cobalt chloride as an additive. SEM and TEM analyses showed that the HSA PANI nanofibers had a coarse surface of very thin nanofibers. The HSA PANI nanofibers had a fairly uniform diameter range of 70-90 nm with a length of 0.5–1 µm, and showed an electrical conductivity (EC) of 3.46 S/cm. TGA analysis revealed that the HSA PANI nanofibers had more doping substances than did ordinary PANI nanofibers. In the case of the HSA PANI nanofibers, direct measurement of the surface area using gas adsorption method showed high value of 68.4m$^{2}$/g, which was nearly twice that of ordinary PANI nanofibers. The HSA PANI nanofibers were used to fabricate the hydrogen sensor, exhibiting a large increase in resistance upon exposure to hydrogen gas. The hydrogen sensor in this work showed excellent characteristics, such as high sensitivity and short response time. The limit of detection (LOD) and limit of quantification (LOQ) of the hydrogen sensor were very low to show 40 ppm and 133 ppm of hydrogen, respectively.
Starting Page	290
Ending Page	298
Page Count	9
File Format	PDF
ISSN	02561115
Journal	Korean Journal of Chemical Engineering
Volume Number	33
Issue Number	1
e-ISSN	19757220
Language	English
Publisher	Springer US
Publisher Date	2015-08-18
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Carbon Dioxide Polyaniline Nanofiber Hydrogen Sensor Industrial Chemistry/Chemical Engineering Catalysis Materials Science Biotechnology
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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