Facile and fast decoration of SnO2 nanowires with Pd embedded SnO2-x nanoparticles for selective NO2 gas sensing

Myung Sik Choi; Ali Mirzaei; Han Gil Na; Sangwoo Kim; Dong Eung Kim; Kyu Hyoung Lee; Changhyun Jin; Sun Woo Choi

doi:10.1016/j.snb.2021.129984

Facile and fast decoration of SnO₂ nanowires with Pd embedded SnO_2-x nanoparticles for selective NO₂ gas sensing

Myung Sik Choi, Ali Mirzaei, Han Gil Na, Sangwoo Kim, Dong Eung Kim, Kyu Hyoung Lee, Changhyun Jin, Sun Woo Choi

Department of Materials Science and Engineering

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

31 Citations (Scopus)

Abstract

The typical methods used to improve the sensing properties of metal oxide nanowire-based gas sensors include decoration of a metal catalyst on the surface of nanowires or generation of surface defects. In this study, we suggest a process for preparing a Pd metal catalyst surrounded in SnO_2-x with a large number of structural defects on the surface of SnO₂ nanowires for gas sensing applications. Initially, SnO₂ nanowires were prepared using a simple vapor-liquid-solid method and Pd-embedded SnO_2-x-decoration was achieved by flame chemical vapor deposition. Gas sensing studies demonstrated the promising effects of Pd-embedded SnO_2-x-decoration. The underlying sensing mechanism was studied in detail and explained in terms of generation of oxygen defects, catalytic activity of Pd, and formation of heterojunctions in the sensing material. The results of the present study clearly demonstrate the usefulness of this simple and fast approach to significantly enhance the gas sensing properties of metal oxide nanowires.

Original language	English
Article number	129984
Journal	Sensors and Actuators, B: Chemical
Volume	340
DOIs	https://doi.org/10.1016/j.snb.2021.129984
Publication status	Published - 2021 Aug 1

Bibliographical note

Funding Information:
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education ( NRF-2020R1I1A1A01067785 and NRF-2020R1I1A1A01067825 ). This research was also 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 ). This study was supported by 2017 Research Grant from Kangwon National University . We are grateful to Jiye Kim, Mun Young Koh, Bomi Kim, Baro Jin, Ha Jin Na, and Koh Eun Na for their cordiality and hospitality during the course of this research.

Publisher Copyright:
© 2021 Elsevier B.V.

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

Access to Document

10.1016/j.snb.2021.129984

Cite this

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title = "Facile and fast decoration of SnO2 nanowires with Pd embedded SnO2-x nanoparticles for selective NO2 gas sensing",

abstract = "The typical methods used to improve the sensing properties of metal oxide nanowire-based gas sensors include decoration of a metal catalyst on the surface of nanowires or generation of surface defects. In this study, we suggest a process for preparing a Pd metal catalyst surrounded in SnO2-x with a large number of structural defects on the surface of SnO2 nanowires for gas sensing applications. Initially, SnO2 nanowires were prepared using a simple vapor-liquid-solid method and Pd-embedded SnO2-x-decoration was achieved by flame chemical vapor deposition. Gas sensing studies demonstrated the promising effects of Pd-embedded SnO2-x-decoration. The underlying sensing mechanism was studied in detail and explained in terms of generation of oxygen defects, catalytic activity of Pd, and formation of heterojunctions in the sensing material. The results of the present study clearly demonstrate the usefulness of this simple and fast approach to significantly enhance the gas sensing properties of metal oxide nanowires.",

author = "Choi, {Myung Sik} and Ali Mirzaei and Na, {Han Gil} and Sangwoo Kim and Kim, {Dong Eung} and Lee, {Kyu Hyoung} and Changhyun Jin and Choi, {Sun Woo}",

note = "Funding Information: This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education ( NRF-2020R1I1A1A01067785 and NRF-2020R1I1A1A01067825 ). This research was also 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 ). This study was supported by 2017 Research Grant from Kangwon National University . We are grateful to Jiye Kim, Mun Young Koh, Bomi Kim, Baro Jin, Ha Jin Na, and Koh Eun Na for their cordiality and hospitality during the course of this research. Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

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AU - Choi, Myung Sik

AU - Mirzaei, Ali

AU - Na, Han Gil

AU - Kim, Sangwoo

AU - Kim, Dong Eung

AU - Lee, Kyu Hyoung

AU - Jin, Changhyun

AU - Choi, Sun Woo

N1 - Funding Information: This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education ( NRF-2020R1I1A1A01067785 and NRF-2020R1I1A1A01067825 ). This research was also 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 ). This study was supported by 2017 Research Grant from Kangwon National University . We are grateful to Jiye Kim, Mun Young Koh, Bomi Kim, Baro Jin, Ha Jin Na, and Koh Eun Na for their cordiality and hospitality during the course of this research. Publisher Copyright: © 2021 Elsevier B.V.

PY - 2021/8/1

Y1 - 2021/8/1

N2 - The typical methods used to improve the sensing properties of metal oxide nanowire-based gas sensors include decoration of a metal catalyst on the surface of nanowires or generation of surface defects. In this study, we suggest a process for preparing a Pd metal catalyst surrounded in SnO2-x with a large number of structural defects on the surface of SnO2 nanowires for gas sensing applications. Initially, SnO2 nanowires were prepared using a simple vapor-liquid-solid method and Pd-embedded SnO2-x-decoration was achieved by flame chemical vapor deposition. Gas sensing studies demonstrated the promising effects of Pd-embedded SnO2-x-decoration. The underlying sensing mechanism was studied in detail and explained in terms of generation of oxygen defects, catalytic activity of Pd, and formation of heterojunctions in the sensing material. The results of the present study clearly demonstrate the usefulness of this simple and fast approach to significantly enhance the gas sensing properties of metal oxide nanowires.

AB - The typical methods used to improve the sensing properties of metal oxide nanowire-based gas sensors include decoration of a metal catalyst on the surface of nanowires or generation of surface defects. In this study, we suggest a process for preparing a Pd metal catalyst surrounded in SnO2-x with a large number of structural defects on the surface of SnO2 nanowires for gas sensing applications. Initially, SnO2 nanowires were prepared using a simple vapor-liquid-solid method and Pd-embedded SnO2-x-decoration was achieved by flame chemical vapor deposition. Gas sensing studies demonstrated the promising effects of Pd-embedded SnO2-x-decoration. The underlying sensing mechanism was studied in detail and explained in terms of generation of oxygen defects, catalytic activity of Pd, and formation of heterojunctions in the sensing material. The results of the present study clearly demonstrate the usefulness of this simple and fast approach to significantly enhance the gas sensing properties of metal oxide nanowires.

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