Highly selective detection of dimethyl methylphosphonate (DMMP) using CuO nanoparticles /ZnO flowers heterojunction

Ran Yoo; Somi Yoo; Dongmei Lee; Jeongmin Kim; Sungmee Cho; Wooyoung Lee

doi:10.1016/j.snb.2016.09.028

Highly selective detection of dimethyl methylphosphonate (DMMP) using CuO nanoparticles /ZnO flowers heterojunction

Ran Yoo, Somi Yoo, Dongmei Lee, Jeongmin Kim, Sungmee Cho, Wooyoung Lee

Department of Materials Science and Engineering

Research output: Contribution to journal › Article

26 Citations (Scopus)

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 (R_a) in air, leading to a reduction of the depletion layer and resistance (R_g) 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	https://doi.org/10.1016/j.snb.2016.09.028
Publication status	Published - 2017 Mar 1

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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Yoo, R., Yoo, S., Lee, D., Kim, J., Cho, S., & Lee, W. (2017). Highly selective detection of dimethyl methylphosphonate (DMMP) using CuO nanoparticles /ZnO flowers heterojunction. Sensors and Actuators, B: Chemical, 240, 1099-1105. https://doi.org/10.1016/j.snb.2016.09.028

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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.",

author = "Ran Yoo and Somi Yoo and Dongmei Lee and Jeongmin Kim and Sungmee Cho and Wooyoung Lee",

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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.

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