CuO/V2O5 hybrid nanowires for highly sensitive and selective H2S gas sensorElectronic supplementary information (ESI) available. See DOI: 10.1039/c7ra06657k
Vanadium pentoxide (V 2 O 5 ) nanowires decorated with CuO nanoparticles on their surface have been prepared by a facile chemical route. The gas-sensing performance of the CuO/V 2 O 5 nanohybrids has been examined against H 2 S, CO, and NO 2 gases over a range of gas concentrations from 7 to 60 ppm...
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| Main Authors | , , , |
|---|---|
| Format | Journal Article |
| Published |
25.10.2017
|
| Online Access | Get full text |
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| Summary: | Vanadium pentoxide (V
2
O
5
) nanowires decorated with CuO nanoparticles on their surface have been prepared by a facile chemical route. The gas-sensing performance of the CuO/V
2
O
5
nanohybrids has been examined against H
2
S, CO, and NO
2
gases over a range of gas concentrations from 7 to 60 ppm and working temperatures from 100 to 400 °C, and compared with that of pristine V
2
O
5
nanowires without the decoration. The CuO/V
2
O
5
nanohybrids exhibit a greatly enhanced sensitivity toward H
2
S gas selectively and are relatively indifferent to CO and NO
2
gases. The gas-sensing response of the nanohybrids increases by nearly 18 times (from 1.84 to 31.86) when tested against 23 ppm of H
2
S gas at 220 °C. The nanohybrids remain stable when detecting H
2
S gas for a period of two weeks. This selective enhancement is attributable to the local p-n junction formed at the interface together with the reversible chemical reaction that occurs when CuO is exposed to H
2
S gas at the temperature employed.
Vanadium pentoxide (V
2
O
5
) nanowires decorated with CuO nanoparticles on their surface have been prepared by a facile chemical route. |
|---|---|
| Bibliography: | 10.1039/c7ra06657k Electronic supplementary information (ESI) available. See DOI |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/c7ra06657k |