Synthesis, characterization and gas sensing properties of ZnO-decorated MWCNTs

Yong Jung Kwon; Ali Mirzaei; Sung Yong Kang; Myung Sik Choi; Jae Hoon Bang; Sang Sub Kim; Hyoun Woo Kim

doi:10.1016/j.apsusc.2017.03.290

Synthesis, characterization and gas sensing properties of ZnO-decorated MWCNTs

Yong Jung Kwon, Ali Mirzaei, Sung Yong Kang, Myung Sik Choi, Jae Hoon Bang, Sang Sub Kim, Hyoun Woo Kim

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

94 Scopus citations

Abstract

In this work, ZnO-decorated multi-walled carbon nanotube (MWCNT) nanocomposites prepared using an in-situ method involving the thermal evaporation of Zn powders in the presence of MWCNTs. The gas sensing characteristics of the MWCNT/ZnO nanocomposites are studied, and results for the material characterizations for the synthesized nanocomposites confirm the formation of well-distributed ZnO nanoparticles onto MWCNTs, creating MWCNT/ZnO nanocomposites. The gas sensing properties of the MWCNT/ZnO nanocomposite gas sensor, such as response, cross-sensitivity, and response-recovery time, are investigated and compared with a bare MWCNT sensor. The decoration of ZnO nanoparticles greatly improves the gas sensing properties of bare MWCNTs. We discussed the possible mechanisms for the enhancement of sensing capabilities. The results suggest that decoration of n-type semiconducting oxide materials, such as ZnO in the form of nanoparticles, is a promising strategy for improvement of gas sensing properties of p-MWCNTs.

Original language	English
Pages (from-to)	242-252
Number of pages	11
Journal	Applied Surface Science
Volume	413
DOIs	https://doi.org/10.1016/j.apsusc.2017.03.290
State	Published - 15 Aug 2017

Keywords

Carbon nanotubes
Gas sensor
MWCNTs
NO
ZnO

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10.1016/j.apsusc.2017.03.290

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title = "Synthesis, characterization and gas sensing properties of ZnO-decorated MWCNTs",

abstract = "In this work, ZnO-decorated multi-walled carbon nanotube (MWCNT) nanocomposites prepared using an in-situ method involving the thermal evaporation of Zn powders in the presence of MWCNTs. The gas sensing characteristics of the MWCNT/ZnO nanocomposites are studied, and results for the material characterizations for the synthesized nanocomposites confirm the formation of well-distributed ZnO nanoparticles onto MWCNTs, creating MWCNT/ZnO nanocomposites. The gas sensing properties of the MWCNT/ZnO nanocomposite gas sensor, such as response, cross-sensitivity, and response-recovery time, are investigated and compared with a bare MWCNT sensor. The decoration of ZnO nanoparticles greatly improves the gas sensing properties of bare MWCNTs. We discussed the possible mechanisms for the enhancement of sensing capabilities. The results suggest that decoration of n-type semiconducting oxide materials, such as ZnO in the form of nanoparticles, is a promising strategy for improvement of gas sensing properties of p-MWCNTs.",

keywords = "Carbon nanotubes, Gas sensor, MWCNTs, NO, ZnO",

author = "Kwon, {Yong Jung} and Ali Mirzaei and Kang, {Sung Yong} and Choi, {Myung Sik} and Bang, {Jae Hoon} and Kim, {Sang Sub} and Kim, {Hyoun Woo}",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2017",

month = aug,

day = "15",

doi = "10.1016/j.apsusc.2017.03.290",

language = "English",

volume = "413",

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journal = "Applied Surface Science",

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T1 - Synthesis, characterization and gas sensing properties of ZnO-decorated MWCNTs

AU - Kwon, Yong Jung

AU - Mirzaei, Ali

AU - Kang, Sung Yong

AU - Choi, Myung Sik

AU - Bang, Jae Hoon

AU - Kim, Sang Sub

AU - Kim, Hyoun Woo

PY - 2017/8/15

Y1 - 2017/8/15

N2 - In this work, ZnO-decorated multi-walled carbon nanotube (MWCNT) nanocomposites prepared using an in-situ method involving the thermal evaporation of Zn powders in the presence of MWCNTs. The gas sensing characteristics of the MWCNT/ZnO nanocomposites are studied, and results for the material characterizations for the synthesized nanocomposites confirm the formation of well-distributed ZnO nanoparticles onto MWCNTs, creating MWCNT/ZnO nanocomposites. The gas sensing properties of the MWCNT/ZnO nanocomposite gas sensor, such as response, cross-sensitivity, and response-recovery time, are investigated and compared with a bare MWCNT sensor. The decoration of ZnO nanoparticles greatly improves the gas sensing properties of bare MWCNTs. We discussed the possible mechanisms for the enhancement of sensing capabilities. The results suggest that decoration of n-type semiconducting oxide materials, such as ZnO in the form of nanoparticles, is a promising strategy for improvement of gas sensing properties of p-MWCNTs.

AB - In this work, ZnO-decorated multi-walled carbon nanotube (MWCNT) nanocomposites prepared using an in-situ method involving the thermal evaporation of Zn powders in the presence of MWCNTs. The gas sensing characteristics of the MWCNT/ZnO nanocomposites are studied, and results for the material characterizations for the synthesized nanocomposites confirm the formation of well-distributed ZnO nanoparticles onto MWCNTs, creating MWCNT/ZnO nanocomposites. The gas sensing properties of the MWCNT/ZnO nanocomposite gas sensor, such as response, cross-sensitivity, and response-recovery time, are investigated and compared with a bare MWCNT sensor. The decoration of ZnO nanoparticles greatly improves the gas sensing properties of bare MWCNTs. We discussed the possible mechanisms for the enhancement of sensing capabilities. The results suggest that decoration of n-type semiconducting oxide materials, such as ZnO in the form of nanoparticles, is a promising strategy for improvement of gas sensing properties of p-MWCNTs.

KW - Carbon nanotubes

KW - Gas sensor

KW - MWCNTs

KW - NO

KW - ZnO

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DO - 10.1016/j.apsusc.2017.03.290

M3 - Article

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SN - 0169-4332

VL - 413

SP - 242

EP - 252

JO - Applied Surface Science

JF - Applied Surface Science

ER -

Synthesis, characterization and gas sensing properties of ZnO-decorated MWCNTs

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Keywords

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