ppb Sensing Level Hydrogen Sulphide at Room Temperature Using Indium Oxide Gas Sensors

Hydrogen sulphide (H 2 S) sensors were prepared from mixtures of indium oxide (In 2 O 3 ), graphite flakes (Gt) and polystyrene (PS). These sensors were found to be highly sensitive to as low as 100 ppb of H2S gas at room temperature and showed high resistance to humidity changes up to relative humi...

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Bibliographic Details
Main Authors: Shboul, Ahmad Al, Shih, Andy, Oukachmih, Mimoun, Izquierdo, Ricardo
Format: Conference Proceeding
Language:English
Subjects:
gas sensor
graphite
hydrogen sulphide
Indium oxide
Online Access:Request full text
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Summary:Hydrogen sulphide (H 2 S) sensors were prepared from mixtures of indium oxide (In 2 O 3 ), graphite flakes (Gt) and polystyrene (PS). These sensors were found to be highly sensitive to as low as 100 ppb of H2S gas at room temperature and showed high resistance to humidity changes up to relative humidity (RH~93%). The sensor's performance when exposed to air and H 2 S gas reveals the sensing mechanism of In 2 O 3 films to H 2 S at room temperature depends mainly on the partial sulfuration of In 2 O 3 by H 2 S gas.
ISSN:2168-9229
DOI:10.1109/SENSORS43011.2019.8956528