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A High‐Performance and Low‐Cost Ethanol Vapor Sensor Based on a TiS 2 /PVP Composite
Author(s) -
HosseiniShokouh Seyed Hossein,
Fardindoost Somayeh,
Zad Azam Iraji
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201803553
Subject(s) - materials science , composite number , electrospinning , foil method , ethanol , electrode , chemical engineering , composite material , nanotechnology , chemistry , organic chemistry , polymer , engineering
Low‐cost ethanol vapor sensors are fabricated by electrospinning of TiS 2 /PVP fibers on pre‐patterned metal electrodes. TiS 2 ribbons have been synthesized through sulfuration of titanium (Ti) foil using chemical vapor transport (CVT). We found selective and stable responses at a low concentration of ethanol vapor (2 ppm) at room temperature with the transient response and recovery times experimentally around 60 s and 2 s respectively. The relatively high responses of sensors (6800% at 18 ppm) are attributable to the synergy effect of TiS 2 /PVP composite structure. The mechanism of sensing is discussed based on proton hopping while the sensors exposed to ethanol vapor.