Detecting low concentration of H2S gas by BaTiO3 nanoparticle-based sensors

Ce-doped BaTiO3 (Ba0.99Ce0.01TiO3) nanoparticles with the sizes of 30–60nm were prepared by the co-precipitation method, and sensors were fabricated by spin coating the nanoparticles on FTO substrates. To further enhance the sensing properties, α-Fe2O3 was decorated to the Ba0.99Ce0.01TiO3 sensor. T...

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Bibliographic Details
Published inSensors and actuators. B, Chemical Vol. 238; pp. 16 - 23
Main Authors Huang, He-Ming, Li, Hua-Yao, Wang, Xiao-Xue, Guo, Xin
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.01.2017
Subjects
Actuators
Barium titanates
BaTiO3
Chemical reactions
Coprecipitation
H2S sensors
Low concentrations
Low temperature
Nanoparticle
Nanoparticles
Sensors
Spin coating
H2S sensors
Nanoparticle
BaTiO3
Low temperature
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Summary:Ce-doped BaTiO3 (Ba0.99Ce0.01TiO3) nanoparticles with the sizes of 30–60nm were prepared by the co-precipitation method, and sensors were fabricated by spin coating the nanoparticles on FTO substrates. To further enhance the sensing properties, α-Fe2O3 was decorated to the Ba0.99Ce0.01TiO3 sensor. The Fe2O3-Ba0.99Ce0.01TiO3 sensor showed fascinating gas sensing performances towards H2S, including the ability to detect low concentrations of H2S (400ppb or lower), fast response and recovery speed (tres=45s and trec=124s) and low working temperatures (150°C). When exposed to H2S, the sensor resistance increased, due to the reduction of Ce4+ to Ce3+ and the chemical reactions of oxygen species.
Bibliography:ObjectType-Article-1
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content type line 23
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2016.06.172