Effective hydrogen gas sensor based on palladium nanoparticles dispersed on graphene sheets by spin coating technique

• Autorzy: Inpaeng Saowaluk , Muangrat Worawut , Tedsree Karaked , Pfeiler Wolfgang , Chodjarusawad Thanawee , Issro Chaisak

Identyfikatory

DOI

10.2478/msp-2020-0030

• Języki publikacji: EN

Abstrakty

EN

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 H₂ at ppm level.

Słowa kluczowe

EN

hydrogen gas sensor; graphene sheets; palladium nanoparticles

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2020
• Tom: Vol. 38, No. 2
• Strony: 305--311
• Opis fizyczny: Bibliogr. 23 poz., tab., rys.

Twórcy

autor

Inpaeng Saowaluk

• Department of Physics, Faculty of Science, Burapha University, Chonburi 20131, Thailand

autor

Muangrat Worawut

• Materials Engineering Program, Office of Education, Faculty of Engineering, Burapha University, Chonburi 20131, Thailand

autor

Tedsree Karaked

• Department of Chemistry, Faculty of Science, Burapha University, Chonburi 20131, Thailand

autor

Pfeiler Wolfgang

• Dynamics of Condensed Systems, Faculty of Physics, University of Vienna, Vienna 1090, Austria

autor

Chodjarusawad Thanawee

• Department of Physics, Faculty of Science, Burapha University, Chonburi 20131, Thailand

autor

Issro Chaisak

• Department of Physics, Faculty of Science, Burapha University, Chonburi 20131, Thailand

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