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http://dx.doi.org/10.14478/ace.2017.1128

Influence of the Micropore Structures of PAN-based Activated Carbon Fibers on Nerve Agent Simulant Gas (DMMP) Sensing Property  

Kang, Da Hee (Department of Chemical Engineering and Applied Chemistry, Chungnam National University)
Kim, Min-Ji (Department of Chemical Engineering and Applied Chemistry, Chungnam National University)
Jo, Hanjoo (Department of Chemical Engineering and Applied Chemistry, Chungnam National University)
Choi, Ye Ji (Department of Chemical Engineering and Applied Chemistry, Chungnam National University)
Lee, Young-Seak (Department of Chemical Engineering and Applied Chemistry, Chungnam National University)
Publication Information
Applied Chemistry for Engineering / v.29, no.2, 2018 , pp. 191-195 More about this Journal
Abstract
In this study, the influence of microporous structures of activated carbon fibers (ACFs) on dimethyl methylphosphonate (DMMP) gas sensing properties as a nerve agent simulant was investigated. The pore structure was given to carbon fibers by chemical activation process, and an electrode was fabricated for gas sensors by using these fibers. The PAN based ACF electrode, which is an N-type semiconductor, received electrons from a reducing gas such as DMMP, and then electrical resistance of its electrode finally decreased because of the reduced density of electron holes. The sensitivity of the fabricated DMMP gas sensor increased from 1.7% to 5.1% as the micropore volume increased. It is attributed that as micropores were formed for adsorbing DMMP whose molecular size was 0.57 nm, electron transfer between DMMP and ACF was facilitated. In conclusion, it is considered that the appropriate pore structure control of ACFs plays an important role in fabricating the DMMP gas sensor with a high sensitivity.
Keywords
nerve agent simulant; dimethyl methylphosphonate (DMMP); gas sensor; activated carbon fibers (ACFs);
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Times Cited By KSCI : 7  (Citation Analysis)
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