Titel
Effective hydrogen gas sensor based on palladium nanoparticles dispersed on graphene sheets by spin coating technique
Autor*in
Saowaluk Inpaeng
Department of Physics, Faculty of Science, Burapha University
Autor*in
Worawut Muangrat
Materials Engineering Program, Office of Education, Faculty of Engineering, Burapha University
Autor*in
Karaked Tedsree
Department of Chemistry, Faculty of Science, Burapha University
... show all
Abstract
A room-temperature hydrogen gas (H2) sensor was successfully fabricated by dispersion of palladium nanoparticles (Pd NPs) on graphene sheets (GRs) (hereafter referred to as “Pd NPs/GRs”). GRs and Pd NPs were synthesized by chemical vapor deposition technique and by polyol process, respectively. A colloidal solution of Pd NPs with an average diameter of 11 nm was then dispersed onto the GRs by spin coating technique. The density of dispersed Pd NPs on GRs was controlled by varying the volume of the dispersed solution within the range of 50 – 150 μL. The fabricated Pd NPs/GRs sensors exhibited a high sensitivity for H2 gas with a concentration of 1500 – 6000 ppm at room temperature. Upon H2 exposure, the Pd NPs/GRs sensors showed an increase in electrical resistance, which could easily be measured. The relationship between sensor response and H2 concentration is in correspondence with the Langmuir adsorption model. The H2 detection limit is estimated to be 1 ppm. The results demonstrate that the Pd NPs/GRs sensor is an easily fabricated, but very effective means for room-temperature detection of H2at ppm level.
Stichwort
hydrogen gas sensorgraphene sheetspalladium nanoparticles
Objekt-Typ
Sprache
Englisch [eng]
Persistent identifier
Erschienen in
Titel
Materials Science-Poland
Band
38
Ausgabe
2
ISSN
2083-134X
Erscheinungsdatum
2020
Seitenanfang
305
Seitenende
311
Publication
Walter de Gruyter GmbH
Erscheinungsdatum
2020
Zugänglichkeit
Rechteangabe
© 2020 Saowaluk Inpaeng et al

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