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Improving Gas-Sensing Performance Based on MOS Nanomaterials: A Review
- Source :
- Materials, Materials, Vol 14, Iss 4263, p 4263 (2021)
- Publication Year :
- 2021
- Publisher :
- MDPI, 2021.
-
Abstract
- In order to solve issues of air pollution, to monitor human health, and to promote agricultural production, gas sensors have been used widely. Metal oxide semiconductor (MOS) gas sensors have become an important area of research in the field of gas sensing due to their high sensitivity, quick response time, and short recovery time for NO2, CO2, acetone, etc. In our article, we mainly focus on the gas-sensing properties of MOS gas sensors and summarize the methods that are based on the interface effect of MOS materials and micro–nanostructures to improve their performance. These methods include noble metal modification, doping, and core-shell (C-S) nanostructure. Moreover, we also describe the mechanism of these methods to analyze the advantages and disadvantages of energy barrier modulation and electron transfer for gas adsorption. Finally, we put forward a variety of research ideas based on the above methods to improve the gas-sensing properties. Some perspectives for the development of MOS gas sensors are also discussed.
- Subjects :
- Technology
Materials science
Nanostructure
improvement methods
Interface (computing)
gas-sensing mechanism
Nanotechnology
02 engineering and technology
Review
engineering.material
010402 general chemistry
01 natural sciences
Nanomaterials
MOS gas sensors
Oxide semiconductor
General Materials Science
Sensitivity (control systems)
Microscopy
QC120-168.85
Doping
QH201-278.5
Response time
gas-sensing properties
research ideas
021001 nanoscience & nanotechnology
Engineering (General). Civil engineering (General)
0104 chemical sciences
TK1-9971
Descriptive and experimental mechanics
engineering
Noble metal
Electrical engineering. Electronics. Nuclear engineering
TA1-2040
0210 nano-technology
Subjects
Details
- Language :
- English
- ISSN :
- 19961944
- Volume :
- 14
- Issue :
- 15
- Database :
- OpenAIRE
- Journal :
- Materials
- Accession number :
- edsair.doi.dedup.....98e4319db5a75a667eb0df7d505d7ef2