<abstract xmlns="http://www.w3.org/1999/xhtml">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.</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.

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

Department of Physics, Faculty of Science

Materials Engineering Program, Office of Education, Faculty of Engineering

2Department of Chemistry, Faculty of Science

Dynamics of Condensed Systems, Faculty of Physics

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

A room-temperature hydrogen gas (H2) sensor was successfully fabricated by dispersion of palladium nanoparticles (Pd NPs) on graphene sheets (GRs) (hereafter...

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

Published Online: Oct 06, 2020

Page range: 305 - 311

Received: Apr 03, 2018

Accepted: Apr 23, 2019

DOI: https://doi.org/10.2478/msp-2020-0030

Keywords
hydrogen gas sensor, graphene sheets, palladium nanoparticles

© 2020 Saowaluk Inpaeng et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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

Published Online: Oct 06, 2020

Page range: 305 - 311

Received: Apr 03, 2018

Accepted: Apr 23, 2019

DOI: https://doi.org/10.2478/msp-2020-0030

Keywordshydrogen gas sensor, graphene sheets, palladium nanoparticles

© 2020 Saowaluk Inpaeng et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
hydrogen gas sensor, graphene sheets, palladium nanoparticles