P8.3 - Study of MWCNT/SnO2 Nanocomposite Acetone and Toluene Vapor Sensors
- AMA Conferences 2015
2015-05-19 - 2015-05-21
- Proceedings SENSOR 2015
- P8 - Gas
- V. Aroutiounian, Z. Adamyan, A. Sayunts, E. Khachaturyan, A. Adamyan - Yerevan State University, Yerevan (Armenia)
- 836 - 841
Thick-film acetone and toluene vapor sensors based on ruthenated multi-walled carbon nanotubes coated with tin-dioxide nanoparticles nanocomposite structures (MWCNTs/SnO2) are prepared using three methods: hydrothermal synthesis, sol–gel technique and their combined method. It is shown that the optimal conditions for applications as acetone and toluene as well as ethanol and methanol vapors sensors in view of high response and selectivity relative to each other depend on choice of material synthesis method, mass ratio of the nanocomposite components and selected operating temperature. MWCNTs/SnO2 sensor structures having the mass ratio of the components 1:4 and 1:24 exhibit selective sensitivity to acetone and toluene vapors at 150ºC operating temperature, respectively. The samples with 1:200 mass ratio of the nanocomposite components was shown the selective response to acetone vapors exposure in the range of 200-250ºC operating temperatures. The high sensitive and selective response to ethanol and methanol vapors is typical for the sensor structures made by different methods with the 1:8, 1:24, 1:50 and 1:66 mass ratio of the components, respectively, only at 200ºC operating temperature. The dependence of the gas response vs acetone and toluene vapor concentration is linear beginning from 100 ppm and higher.