Selective, sensitive, and stable NO2 gas sensor based on porous ZnO nanosheets
- Selective, sensitive, and stable NO2 gas sensor based on porous ZnO nanosheets
- 천동원; 백승협; Myung Sik Choi; Min Young Kim; Ali Mirzaei; Hyun-Sik Kim; Sang-il Kim; Changhyun Jin; Kyu Hyoung Lee
- Porous ZnO nanosheet; NO2 gas; Gas sensor; Sensing mechanism
- Issue Date
- Applied surface science
- VOL 568
- In this study, we synthesized porous (porosity: ~16%, average pore size: ~60 nm) ZnO nanosheets (thickness:
~80 nm) using a conventional solvothermal method to investigate NO2 gas sensing properties. Porous ZnO
nanosheets triggered the detection of NO2 gas with high sensitivity. Responses of 2.93 ？ 0.5 ppm and 74.68 ？ 10
ppm NO2 gas at 200 ？C were observed in the porous ZnO nanosheet-based gas sensor. In addition, improved
sensing properties with high selectivity to NO2 gas, reasonable stability, and high response even in the presence
of water vapor molecules were obtained. We found that the enhanced NO2 gas response of the porous ZnO
nanosheet-based gas sensor was due to the synergetic effects of the high surface area, ZnO/ZnO homojunctions,
and structural defects. We developed a highly sensitive NO2 gas sensor with improved reliability using
morphologically engineered ZnO, which was prepared via a simple and scalable chemical-synthesis route.
- Appears in Collections:
- KIST Publication > Article
- Files in This Item:
There are no files associated with this item.
- RIS (EndNote)
- XLS (Excel)
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.