Dual gas sensing properties of graphene-Pd/SnO2 composites for H2 and ethanol: Role of nanoparticles-graphene interface |
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| Authors: | Shivani Dhall Manasvi Kumar Mehar Bhatnagar B.R. Mehta |
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| Affiliation: | 1. Thin Film Laboratory, Department of Physics, Indian Institute of Technology Delhi, India;2. Max Planck Institute for Polymer Research, Germany |
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| Abstract: | In the present work, role of palladium (Pd) and tin oxide (SnO2) nanoparticles (NPs) deposited on graphene has been investigated in terms of dual gas sensing characteristics of ethanol and H2 between two temperatures. The incorporation of nanoparticles into graphene has been observed which results a large change in the sensing response towards these gases. It is investigated that, incorporation of isolated Pd NPs on the graphene facilitates the room temperature sensing of H2 gas with fast response and recovery time whereas, isolated SnO2 NPs on graphene enables the detection of ethanol at 200 °C. However, combination of isolated Pd and SnO2 NPs on graphene shows improved sensitivity and good selectivity towards H2 and ethanol, usually not observed in chemiresistive gas sensors. Catalytic Pd | |
| Keywords: | Graphene Composites Nanoparticles Raman Gas sensor |
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