UV-enhanced acetone gas sensing of Co3O4-decorated ZnS nanorod gas sensors
Co 3 O 4 -decorated ZnS nanorods were synthesized by the thermal evaporation of ZnS powders followed by a sol-gel process for Co 3 O 4 -decoration. The acetone gas sensing properties of multiple-networked pristine and Co 3 O 4 -decorated ZnS nanorod sensors were examined. The diameters of the Co 3 O...
Saved in:
Published in | Electronic materials letters Vol. 11; no. 4; pp. 572 - 579 |
---|---|
Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Seoul
The Korean Institute of Metals and Materials
01.07.2015
대한금속·재료학회 |
Subjects | |
Online Access | Get full text |
ISSN | 1738-8090 2093-6788 |
DOI | 10.1007/s13391-015-5051-8 |
Cover
Summary: | Co
3
O
4
-decorated ZnS nanorods were synthesized by the thermal evaporation of ZnS powders followed by a sol-gel process for Co
3
O
4
-decoration. The acetone gas sensing properties of multiple-networked pristine and Co
3
O
4
-decorated ZnS nanorod sensors were examined. The diameters of the Co
3
O
4
nanoparticles ranged from 4 to 20 nm. The multiple networked pristine ZnS nanorods and Co
3
O
4
-decorated ZnS nanorod sensors showed responses of 156–364% and 198–1,650% to 10–500 ppm of acetone at room temperature under UV illumination at 2.2 mW/cm
2
, respectively. The response and recovery times of the ZnS nanorod sensor at 500 ppm of acetone was reduced from 52 s to 26 s and from 192 s to 110 s, respectively, by Co
3
O
4
-decoration. The responses of the sensors exhibited strong dependence on the UV illumination intensity. The responses of the pristine ZnS nanorod and Co
3
O
4
-decorated ZnS nanorod sensors to 500 ppm of acetone at room temperature increased from 112 to 364% and from 132 to 1650%, respectively. This paper discusses the underlying mechanisms of the enhanced response of the ZnS nanorod sensor to acetone gas by Co
3
O
4
-decoration and UV irradiation. |
---|---|
Bibliography: | G704-SER000000579.2015.11.4.017 |
ISSN: | 1738-8090 2093-6788 |
DOI: | 10.1007/s13391-015-5051-8 |