Abstract
Pure and CuO-loaded In2O3 nanofibers were prepared by electrospinning and their H2S sensing characteristics were investigated. The loading of CuO on In2O3 nanofibers significantly enhanced the gas response (ratio of the resistance in air to that in gas) toward 5 ppm H2S from 515 to 1.16 × 105 at 150 °C. The CuO-loaded In2O3 nanofibers also exhibited high gas response (9.17 × 103 toward 5 ppm H2S) at room temperature. The CuO-loaded In2O3 nanofibers showed ultrahigh selectivity to H2S concerning interferences with NO2, H2, CO, NH3, C2H5OH, C3H6O, TMA, C7H8, and C8H10 at room temperature and 150 °C. The operation of the sensor using pulse heating was suggested reliable H2S sensing with complete recovery. The ultrasensitivie and ultraselective H2S sensing characteristics are explained in terms of the creation and disruption of p-n junctions in the presence and absence of H2S, respectively, the high specific surface area provided by the networks of one-dimensional polycrystalline nanofibers, and the abundance of p-n junctions due to the uniform mixing between p-CuO and n-In2O3 nanograins within the nanofibers.
| Original language | English |
|---|---|
| Pages (from-to) | 934-942 |
| Number of pages | 9 |
| Journal | Sensors and Actuators, B: Chemical |
| Volume | 209 |
| DOIs | |
| Publication status | Published - 2015 Mar 31 |
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Keywords
- CuO-loaded InO
- Electrospinning
- Gas sensors
- HS
- Nanofibers
- Pulse heating
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
- Metals and Alloys
- Surfaces, Coatings and Films
- Materials Chemistry
- Instrumentation
Cite this
Ultrasensitive and ultraselective detection of H2S using electrospun CuO-loaded In2O3 nanofiber sensors assisted by pulse heating. / Liang, Xishuang; Kim, Tae Hyung; Yoon, Ji Wook; Kwak, Chang Hoon; Lee, Jong Heun.
In: Sensors and Actuators, B: Chemical, Vol. 209, 31.03.2015, p. 934-942.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Ultrasensitive and ultraselective detection of H2S using electrospun CuO-loaded In2O3 nanofiber sensors assisted by pulse heating
AU - Liang, Xishuang
AU - Kim, Tae Hyung
AU - Yoon, Ji Wook
AU - Kwak, Chang Hoon
AU - Lee, Jong Heun
PY - 2015/3/31
Y1 - 2015/3/31
N2 - Pure and CuO-loaded In2O3 nanofibers were prepared by electrospinning and their H2S sensing characteristics were investigated. The loading of CuO on In2O3 nanofibers significantly enhanced the gas response (ratio of the resistance in air to that in gas) toward 5 ppm H2S from 515 to 1.16 × 105 at 150 °C. The CuO-loaded In2O3 nanofibers also exhibited high gas response (9.17 × 103 toward 5 ppm H2S) at room temperature. The CuO-loaded In2O3 nanofibers showed ultrahigh selectivity to H2S concerning interferences with NO2, H2, CO, NH3, C2H5OH, C3H6O, TMA, C7H8, and C8H10 at room temperature and 150 °C. The operation of the sensor using pulse heating was suggested reliable H2S sensing with complete recovery. The ultrasensitivie and ultraselective H2S sensing characteristics are explained in terms of the creation and disruption of p-n junctions in the presence and absence of H2S, respectively, the high specific surface area provided by the networks of one-dimensional polycrystalline nanofibers, and the abundance of p-n junctions due to the uniform mixing between p-CuO and n-In2O3 nanograins within the nanofibers.
AB - Pure and CuO-loaded In2O3 nanofibers were prepared by electrospinning and their H2S sensing characteristics were investigated. The loading of CuO on In2O3 nanofibers significantly enhanced the gas response (ratio of the resistance in air to that in gas) toward 5 ppm H2S from 515 to 1.16 × 105 at 150 °C. The CuO-loaded In2O3 nanofibers also exhibited high gas response (9.17 × 103 toward 5 ppm H2S) at room temperature. The CuO-loaded In2O3 nanofibers showed ultrahigh selectivity to H2S concerning interferences with NO2, H2, CO, NH3, C2H5OH, C3H6O, TMA, C7H8, and C8H10 at room temperature and 150 °C. The operation of the sensor using pulse heating was suggested reliable H2S sensing with complete recovery. The ultrasensitivie and ultraselective H2S sensing characteristics are explained in terms of the creation and disruption of p-n junctions in the presence and absence of H2S, respectively, the high specific surface area provided by the networks of one-dimensional polycrystalline nanofibers, and the abundance of p-n junctions due to the uniform mixing between p-CuO and n-In2O3 nanograins within the nanofibers.
KW - CuO-loaded InO
KW - Electrospinning
KW - Gas sensors
KW - HS
KW - Nanofibers
KW - Pulse heating
UR - http://www.scopus.com/inward/record.url?scp=84920164169&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84920164169&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2014.11.130
DO - 10.1016/j.snb.2014.11.130
M3 - Article
AN - SCOPUS:84920164169
VL - 209
SP - 934
EP - 942
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
SN - 0925-4005
ER -