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Post-treatment effects on the gas sensing performance of carbon nanotube sheets
- Source :
- Applied Surface Science. 481:597-603
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- In this study, pristine carbon nanotubes (CNTs) and the CNTs functionalized through heat treatment were fabricated, and their hydrogen (H2) gas sensing characteristics were evaluated at room temperature. Pristine CNTs exhibited relatively low reactivity toward H2 gas, whereas functionalized CNTs demonstrated linear electrical response characteristics with an increase in the gas concentration due to the presence of functional groups (such as COOH and OH) on the CNT surface, which reduced the activation energy for the adsorption of H2 molecules and provided additional reactive sites. Thus, functionalized CNTs can be potentially utilized in various fields because their operation does not require high-temperature environments (unlike the currently used metal oxide-based H2 sensors), while the power consumption and explosion risks of these materials are easily reduced through a simple heat treatment process.
- Subjects :
- Materials science
Hydrogen
Oxide
General Physics and Astronomy
chemistry.chemical_element
02 engineering and technology
Carbon nanotube
Activation energy
010402 general chemistry
01 natural sciences
law.invention
Metal
chemistry.chemical_compound
Adsorption
law
Molecule
Reactivity (chemistry)
Surfaces and Interfaces
General Chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
0104 chemical sciences
Surfaces, Coatings and Films
Chemical engineering
chemistry
visual_art
visual_art.visual_art_medium
0210 nano-technology
Subjects
Details
- ISSN :
- 01694332
- Volume :
- 481
- Database :
- OpenAIRE
- Journal :
- Applied Surface Science
- Accession number :
- edsair.doi...........183ab39ecd51d96c71f759cfc63a61be