Abstract
Here we report the fabrication of high surface area CuO nanoparticles (NPs) on micron-scale ZnO (CuO/ZnO) “flowers” with dimethyl methylphosphonate (DMMP) gas sensing capabilities. The formation of CuO NPs/ZnO heterojunction structures was confirmed by PXRD and TEM analyses. The gas sensing properties of the CuO NPs/ZnO structures showed a faster response time (26.2 s) compared to the exclusively ZnO-based sensor (330 s). The heterojunction sensors demonstrated the highest selectivity in 10 ppm DMMP, reaching the high value of 626.21 at 350 °C. This CuO NPs/ZnO heterojunction structure provides an extension of the depletion layer and an increase of the resistance (Ra) in air, leading to a reduction of the depletion layer and resistance (Rg) when exposed to reducing DMMP gas. The higher surface area (6.0 m2/g) of the CuO/ZnO heterojunction structure with a 0.5 h synthesis time of the ZnO flowers further promoted the adsorption kinetics for the reaction between C3H9O3P and O2− when exposed to DMMP, thus enhancing its sensing properties.
| Original language | English |
|---|---|
| Pages (from-to) | 1099-1105 |
| Number of pages | 7 |
| Journal | Sensors and Actuators, B: Chemical |
| Volume | 240 |
| DOIs | |
| Publication status | Published - 2017 Mar 1 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Instrumentation
- Condensed Matter Physics
- Surfaces, Coatings and Films
- Metals and Alloys
- Electrical and Electronic Engineering
- Materials Chemistry
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Highly selective detection of dimethyl methylphosphonate (DMMP) using CuO nanoparticles /ZnO flowers heterojunction. / Yoo, Ran; Yoo, Somi; Lee, Dongmei; Kim, Jeongmin; Cho, Sungmee; Lee, Wooyoung.
In: Sensors and Actuators, B: Chemical, Vol. 240, 01.03.2017, p. 1099-1105.Research output: Contribution to journal › Article
TY - JOUR
T1 - Highly selective detection of dimethyl methylphosphonate (DMMP) using CuO nanoparticles /ZnO flowers heterojunction
AU - Yoo, Ran
AU - Yoo, Somi
AU - Lee, Dongmei
AU - Kim, Jeongmin
AU - Cho, Sungmee
AU - Lee, Wooyoung
PY - 2017/3/1
Y1 - 2017/3/1
N2 - Here we report the fabrication of high surface area CuO nanoparticles (NPs) on micron-scale ZnO (CuO/ZnO) “flowers” with dimethyl methylphosphonate (DMMP) gas sensing capabilities. The formation of CuO NPs/ZnO heterojunction structures was confirmed by PXRD and TEM analyses. The gas sensing properties of the CuO NPs/ZnO structures showed a faster response time (26.2 s) compared to the exclusively ZnO-based sensor (330 s). The heterojunction sensors demonstrated the highest selectivity in 10 ppm DMMP, reaching the high value of 626.21 at 350 °C. This CuO NPs/ZnO heterojunction structure provides an extension of the depletion layer and an increase of the resistance (Ra) in air, leading to a reduction of the depletion layer and resistance (Rg) when exposed to reducing DMMP gas. The higher surface area (6.0 m2/g) of the CuO/ZnO heterojunction structure with a 0.5 h synthesis time of the ZnO flowers further promoted the adsorption kinetics for the reaction between C3H9O3P and O2− when exposed to DMMP, thus enhancing its sensing properties.
AB - Here we report the fabrication of high surface area CuO nanoparticles (NPs) on micron-scale ZnO (CuO/ZnO) “flowers” with dimethyl methylphosphonate (DMMP) gas sensing capabilities. The formation of CuO NPs/ZnO heterojunction structures was confirmed by PXRD and TEM analyses. The gas sensing properties of the CuO NPs/ZnO structures showed a faster response time (26.2 s) compared to the exclusively ZnO-based sensor (330 s). The heterojunction sensors demonstrated the highest selectivity in 10 ppm DMMP, reaching the high value of 626.21 at 350 °C. This CuO NPs/ZnO heterojunction structure provides an extension of the depletion layer and an increase of the resistance (Ra) in air, leading to a reduction of the depletion layer and resistance (Rg) when exposed to reducing DMMP gas. The higher surface area (6.0 m2/g) of the CuO/ZnO heterojunction structure with a 0.5 h synthesis time of the ZnO flowers further promoted the adsorption kinetics for the reaction between C3H9O3P and O2− when exposed to DMMP, thus enhancing its sensing properties.
UR - http://www.scopus.com/inward/record.url?scp=84991735112&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84991735112&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2016.09.028
DO - 10.1016/j.snb.2016.09.028
M3 - Article
VL - 240
SP - 1099
EP - 1105
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
SN - 0925-4005
ER -