Selective, sensitive, and stable NO2 gas sensor based on porous ZnO nanosheets

Myung Sik Choi; Min Young Kim; Ali Mirzaei; Hyun Sik Kim; Sang il Kim; Seung Hyub Baek; Dong Won Chun; Changhyun Jin; Kyu Hyoung Lee

doi:10.1016/j.apsusc.2021.150910

Selective, sensitive, and stable NO₂ gas sensor based on porous ZnO nanosheets

Myung Sik Choi, Min Young Kim, Ali Mirzaei, Hyun Sik Kim, Sang il Kim, Seung Hyub Baek, Dong Won Chun, Changhyun Jin, Kyu Hyoung Lee

Department of Materials Science and Engineering

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

57 Citations (Scopus)

Abstract

In this study, we synthesized porous (porosity: ~16%, average pore size: ~60 nm) ZnO nanosheets (thickness: ~80 nm) using a conventional solvothermal method to investigate NO₂ gas sensing properties. Porous ZnO nanosheets triggered the detection of NO₂ gas with high sensitivity. Responses of 2.93 – 0.5 ppm and 74.68 – 10 ppm NO₂ gas at 200 °C were observed in the porous ZnO nanosheet-based gas sensor. In addition, improved sensing properties with high selectivity to NO₂ gas, reasonable stability, and high response even in the presence of water vapor molecules were obtained. We found that the enhanced NO₂ gas response of the porous ZnO nanosheet-based gas sensor was due to the synergetic effects of the high surface area, ZnO/ZnO homojunctions, and structural defects. We developed a highly sensitive NO₂ gas sensor with improved reliability using morphologically engineered ZnO, which was prepared via a simple and scalable chemical-synthesis route.

Original language	English
Article number	150910
Journal	Applied Surface Science
Volume	568
DOIs	https://doi.org/10.1016/j.apsusc.2021.150910
Publication status	Published - 2021 Dec 1

Bibliographical note

Funding Information:
This work was supported by Yonsei-KIST Convergence Research Program. This research was also supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2019R1A6A1A11055660). M. S. Choi was supported by the Korea Initiative for fostering the University of Research and Innovation (KIURI) Program of the National Research Foundation (NRF) funded by the Korean government (MSIT) (NRF-2020M3H1A1077207).

Publisher Copyright:
© 2021 Elsevier B.V.

All Science Journal Classification (ASJC) codes

Chemistry(all)
Condensed Matter Physics
Physics and Astronomy(all)
Surfaces and Interfaces
Surfaces, Coatings and Films

Access to Document

10.1016/j.apsusc.2021.150910

Cite this

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title = "Selective, sensitive, and stable NO2 gas sensor based on porous ZnO nanosheets",

abstract = "In this study, we synthesized porous (porosity: ~16%, average pore size: ~60 nm) ZnO nanosheets (thickness: ~80 nm) using a conventional solvothermal method to investigate NO2 gas sensing properties. Porous ZnO nanosheets triggered the detection of NO2 gas with high sensitivity. Responses of 2.93 – 0.5 ppm and 74.68 – 10 ppm NO2 gas at 200 °C were observed in the porous ZnO nanosheet-based gas sensor. In addition, improved sensing properties with high selectivity to NO2 gas, reasonable stability, and high response even in the presence of water vapor molecules were obtained. We found that the enhanced NO2 gas response of the porous ZnO nanosheet-based gas sensor was due to the synergetic effects of the high surface area, ZnO/ZnO homojunctions, and structural defects. We developed a highly sensitive NO2 gas sensor with improved reliability using morphologically engineered ZnO, which was prepared via a simple and scalable chemical-synthesis route.",

author = "{Sik Choi}, Myung and {Young Kim}, Min and Ali Mirzaei and Kim, {Hyun Sik} and Kim, {Sang il} and Baek, {Seung Hyub} and {Won Chun}, Dong and Changhyun Jin and {Hyoung Lee}, Kyu",

note = "Funding Information: This work was supported by Yonsei-KIST Convergence Research Program. This research was also supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2019R1A6A1A11055660). M. S. Choi was supported by the Korea Initiative for fostering the University of Research and Innovation (KIURI) Program of the National Research Foundation (NRF) funded by the Korean government (MSIT) (NRF-2020M3H1A1077207). Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

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doi = "10.1016/j.apsusc.2021.150910",

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T1 - Selective, sensitive, and stable NO2 gas sensor based on porous ZnO nanosheets

AU - Sik Choi, Myung

AU - Young Kim, Min

AU - Mirzaei, Ali

AU - Kim, Hyun Sik

AU - Kim, Sang il

AU - Baek, Seung Hyub

AU - Won Chun, Dong

AU - Jin, Changhyun

AU - Hyoung Lee, Kyu

N1 - Funding Information: This work was supported by Yonsei-KIST Convergence Research Program. This research was also supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2019R1A6A1A11055660). M. S. Choi was supported by the Korea Initiative for fostering the University of Research and Innovation (KIURI) Program of the National Research Foundation (NRF) funded by the Korean government (MSIT) (NRF-2020M3H1A1077207). Publisher Copyright: © 2021 Elsevier B.V.

PY - 2021/12/1

Y1 - 2021/12/1

N2 - In this study, we synthesized porous (porosity: ~16%, average pore size: ~60 nm) ZnO nanosheets (thickness: ~80 nm) using a conventional solvothermal method to investigate NO2 gas sensing properties. Porous ZnO nanosheets triggered the detection of NO2 gas with high sensitivity. Responses of 2.93 – 0.5 ppm and 74.68 – 10 ppm NO2 gas at 200 °C were observed in the porous ZnO nanosheet-based gas sensor. In addition, improved sensing properties with high selectivity to NO2 gas, reasonable stability, and high response even in the presence of water vapor molecules were obtained. We found that the enhanced NO2 gas response of the porous ZnO nanosheet-based gas sensor was due to the synergetic effects of the high surface area, ZnO/ZnO homojunctions, and structural defects. We developed a highly sensitive NO2 gas sensor with improved reliability using morphologically engineered ZnO, which was prepared via a simple and scalable chemical-synthesis route.

AB - In this study, we synthesized porous (porosity: ~16%, average pore size: ~60 nm) ZnO nanosheets (thickness: ~80 nm) using a conventional solvothermal method to investigate NO2 gas sensing properties. Porous ZnO nanosheets triggered the detection of NO2 gas with high sensitivity. Responses of 2.93 – 0.5 ppm and 74.68 – 10 ppm NO2 gas at 200 °C were observed in the porous ZnO nanosheet-based gas sensor. In addition, improved sensing properties with high selectivity to NO2 gas, reasonable stability, and high response even in the presence of water vapor molecules were obtained. We found that the enhanced NO2 gas response of the porous ZnO nanosheet-based gas sensor was due to the synergetic effects of the high surface area, ZnO/ZnO homojunctions, and structural defects. We developed a highly sensitive NO2 gas sensor with improved reliability using morphologically engineered ZnO, which was prepared via a simple and scalable chemical-synthesis route.

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