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

Division of Nanotechnology

Yonsei University

Research output: Contribution to journal › Article › peer-review

85 Scopus citations

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
State	Published - 1 Mar 2017

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Publisher Copyright:
© 2016 Elsevier B.V.

Keywords

CuO NPs/ZnO flowers
Dimethyl methylphosphonate (DMMP) gas
Gas sensor
Hydrothermal synthesis

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10.1016/j.snb.2016.09.028

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

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.",

keywords = "CuO NPs/ZnO flowers, Dimethyl methylphosphonate (DMMP) gas, Gas sensor, Hydrothermal synthesis",

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

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

year = "2017",

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doi = "10.1016/j.snb.2016.09.028",

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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.

KW - CuO NPs/ZnO flowers

KW - Dimethyl methylphosphonate (DMMP) gas

KW - Gas sensor

KW - Hydrothermal synthesis

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DO - 10.1016/j.snb.2016.09.028

M3 - Article

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JO - Sensors and Actuators, B: Chemical

JF - Sensors and Actuators, B: Chemical

ER -

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

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