Abstract
Network nano-sheet arrays of Co3O4 for high precision NH3 sensing application were prepared on alumina tube using a facile hydrothermal process without template or surfactant, and their morphology, nanostructures and NH3 gas sensing performance were investigated. The prepared nano-sheet Co3O4 arrays showed a network structure with an average sheet thickness of 39.5 nm. Detailed structural analysis confirmed that the synthesized Co3O4 nano-sheets were consisted of nanoparticles with an average diameter of 20.0 nm. NH3 gas sensor based on these network Co3O4 nano-sheet arrays showed a low detection limit (0.2 ppm), rapid response/recovery time (9 s/134 s for 0.2 ppm NH3), good reproducibility and long-term stability for NH3 detection at room temperature.
Original language | English |
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Pages (from-to) | 222-231 |
Journal | Sensors and Actuators B: Chemical |
Volume | 235 |
Early online date | 13 May 2016 |
DOIs | |
Publication status | Published - 1 Nov 2016 |
Keywords
- Co3O4
- Nano-sheet array
- Hydrothermal
- NH3 gas
- Gas sensor