Synthesis, Characterization and Gas-Sensing Properties of Pristine and SnS2 Functionalized TeO2 Nanowires

Sangwoo Kim; Jae Hoon Bang; Myung Sik Choi; Wansik Oum; Ali Mirzaei; Namgue Lee; Hyouk Chon Kwon; Dohyung Lee; Hyeongtag Jeon; Sang Sub Kim; Hyoun Woo Kim

doi:10.1007/s12540-018-00219-6

Synthesis, Characterization and Gas-Sensing Properties of Pristine and SnS₂ Functionalized TeO₂ Nanowires

Sangwoo Kim, Jae Hoon Bang, Myung Sik Choi, Wansik Oum, Ali Mirzaei, Namgue Lee, Hyouk Chon Kwon, Dohyung Lee, Hyeongtag Jeon, Sang Sub Kim, Hyoun Woo Kim

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

17 Scopus citations

Abstract

We report the gas-sensing properties of pristine and SnS₂ functionalized TeO₂ nanowires (NWs). TeO₂ NWs were synthesized by a vapor–liquid–solid growth method, and SnS₂ functionalization was performed using an atomic layer deposition technique followed by thermal treatment. Structural and morphological analyses verified the formation of pristine and SnS₂ functionalized TeO₂ NWs with desired composition, phase, and morphology. Interestingly, sensing results showed that the pristine TeO₂ NW gas sensor had better sensing properties relative to the SnS₂ functionalized TeO₂ NW gas sensor. An underlying sensing mechanism is explained in detail, and reasons for the decrease of sensing performance with the SnS₂ functionalized TeO₂ NW sensor was attributed to the coverage of TeO₂ surface by the SnS₂ nanoparticles.

Original language	English
Pages (from-to)	805-813
Number of pages	9
Journal	Metals and Materials International
Volume	25
Issue number	3
DOIs	https://doi.org/10.1007/s12540-018-00219-6
State	Published - 1 May 2019

Bibliographical note

Publisher Copyright:
© 2018, The Korean Institute of Metals and Materials.

Keywords

Gas sensor
NO gas
Sensing mechanism
SnS
TeO

Access to Document

10.1007/s12540-018-00219-6

Cite this

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title = "Synthesis, Characterization and Gas-Sensing Properties of Pristine and SnS2 Functionalized TeO2 Nanowires",

abstract = "We report the gas-sensing properties of pristine and SnS2 functionalized TeO2 nanowires (NWs). TeO2 NWs were synthesized by a vapor–liquid–solid growth method, and SnS2 functionalization was performed using an atomic layer deposition technique followed by thermal treatment. Structural and morphological analyses verified the formation of pristine and SnS2 functionalized TeO2 NWs with desired composition, phase, and morphology. Interestingly, sensing results showed that the pristine TeO2 NW gas sensor had better sensing properties relative to the SnS2 functionalized TeO2 NW gas sensor. An underlying sensing mechanism is explained in detail, and reasons for the decrease of sensing performance with the SnS2 functionalized TeO2 NW sensor was attributed to the coverage of TeO2 surface by the SnS2 nanoparticles.",

keywords = "Gas sensor, NO gas, Sensing mechanism, SnS, TeO",

author = "Sangwoo Kim and Bang, {Jae Hoon} and Choi, {Myung Sik} and Wansik Oum and Ali Mirzaei and Namgue Lee and Kwon, {Hyouk Chon} and Dohyung Lee and Hyeongtag Jeon and Kim, {Sang Sub} and Kim, {Hyoun Woo}",

note = "Publisher Copyright: {\textcopyright} 2018, The Korean Institute of Metals and Materials.",

year = "2019",

month = may,

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doi = "10.1007/s12540-018-00219-6",

language = "English",

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T1 - Synthesis, Characterization and Gas-Sensing Properties of Pristine and SnS2 Functionalized TeO2 Nanowires

AU - Kim, Sangwoo

AU - Bang, Jae Hoon

AU - Choi, Myung Sik

AU - Oum, Wansik

AU - Mirzaei, Ali

AU - Lee, Namgue

AU - Kwon, Hyouk Chon

AU - Lee, Dohyung

AU - Jeon, Hyeongtag

AU - Kim, Sang Sub

AU - Kim, Hyoun Woo

PY - 2019/5/1

Y1 - 2019/5/1

N2 - We report the gas-sensing properties of pristine and SnS2 functionalized TeO2 nanowires (NWs). TeO2 NWs were synthesized by a vapor–liquid–solid growth method, and SnS2 functionalization was performed using an atomic layer deposition technique followed by thermal treatment. Structural and morphological analyses verified the formation of pristine and SnS2 functionalized TeO2 NWs with desired composition, phase, and morphology. Interestingly, sensing results showed that the pristine TeO2 NW gas sensor had better sensing properties relative to the SnS2 functionalized TeO2 NW gas sensor. An underlying sensing mechanism is explained in detail, and reasons for the decrease of sensing performance with the SnS2 functionalized TeO2 NW sensor was attributed to the coverage of TeO2 surface by the SnS2 nanoparticles.

AB - We report the gas-sensing properties of pristine and SnS2 functionalized TeO2 nanowires (NWs). TeO2 NWs were synthesized by a vapor–liquid–solid growth method, and SnS2 functionalization was performed using an atomic layer deposition technique followed by thermal treatment. Structural and morphological analyses verified the formation of pristine and SnS2 functionalized TeO2 NWs with desired composition, phase, and morphology. Interestingly, sensing results showed that the pristine TeO2 NW gas sensor had better sensing properties relative to the SnS2 functionalized TeO2 NW gas sensor. An underlying sensing mechanism is explained in detail, and reasons for the decrease of sensing performance with the SnS2 functionalized TeO2 NW sensor was attributed to the coverage of TeO2 surface by the SnS2 nanoparticles.

KW - Gas sensor

KW - NO gas

KW - Sensing mechanism

KW - SnS

KW - TeO

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