GS7.2 - Carbon-Encapsulated Co3O4 Nanofibers for Room Temperature Selective NH3 sensors
- 17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
- Gas Sensors 7 - Systems
- Q. Feng, X. Li, J. Wang - School of Electronic Science and Technology, Institute for Sensing Technologies, Key Laboratory of Liaoning for Integrated Circuits Technology, Dalian University of Technology, Dalian (China)
- 274 - 275
Carbon-encapsulated Co3O4 nanofiber composites with rGO were successfully fabricated by using the electrospinning technology. The morphology and resistance of Carbon-encapsulated Co3O4 samples can be controlled by preparing condition. The as-electrospun carbon-Co3O4 nanofiber composites based chemo resistive sensor all showed good sensitivity to different concentrations of ammonia. Besides this, the sensor exhibited good selectivity to several potential interferents such as methanol, ethanol, formaldehyde, acetone, benzene, and methylbenzene. Water did play an important role in the sensing process. We discussed the sensing mechanism based on DFT-based first principle calculations.