Graphene-Ag2S hybrid nanostructures: A hybrid gas sensor for room temperature hydrogen sensing application

•Ag2S-Graphene based hybrid nanostructure showed remarkable hydrogen sensing performance at room temperature.•The microwave assisted hydrothermal synthesis approach provides highly scalable Ag2S-Graphene based hybrid nanostructure.•The Ag2S-Graphene based hybrid sensor proved better sensing response...

Full description

Saved in:
Bibliographic Details
Published inMaterials letters Vol. 303; p. 130470
Main Authors Aysha Parveen, R., Ajay Rakkesh, R., Durgalakshmi, D., Balakumar, S.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 15.11.2021
Elsevier BV
Subjects
2D materials
Biomass
Electron micrographs
Gas sensors
Graphene
Hybrid nanostructures
Hydrogen
Hydrogen gas
Materials science
Nanoparticles
Nanostructure
Response time
Room temperature
Sensors
Synthesis
Hybrid nanostructures
Sensors
Biomass
Graphene
Hydrogen gas
2D materials
Online AccessGet full text

Cover

More Information
Summary:•Ag2S-Graphene based hybrid nanostructure showed remarkable hydrogen sensing performance at room temperature.•The microwave assisted hydrothermal synthesis approach provides highly scalable Ag2S-Graphene based hybrid nanostructure.•The Ag2S-Graphene based hybrid sensor proved better sensing response of 45.5% at room temperature. Herein, we aimed to synthesize an efficient room-temperature gas sensor using biomass-derived graphene nanosheets-Ag2S based hybrid nanostructure by a microwave-assisted hydrothermal method. The electron micrographs of the synthesized Ag2S-GNS nanostructure depicts rice-shaped Ag2S nanoparticles impregnated onto graphene surfaces. Interestingly, the bandgap of Ag2S and Ag2S-GNS based hybrid nanostructures were identified to be 2.04 eV and 1.75 eV, respectively. The Ag2S-GNS based hybrid nanostructure showed better hydrogen sensing efficiency than the pure Ag2S nanoparticles. The maximum response of 45.5 % for 150 ppm exposure of hydrogen gas was obtained for Ag2S-GNS based hybrid nanostructure at room temperature. The sensing response and recovery of Ag2S-GNS hybrid nanostructures towards hydrogen gas were found to be 19 sec and 31 sec, respectively. The high gas sensitivity and fast response time of the hybrid sensor were due to assorted attributes and synergetic effect between Ag2S and GNS hybrids.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2021.130470