Selective and sensitive detection of trimethylamine using ZnO-In 2O3 composite nanofibers

Chul Soon Lee; Il Doo Kim; Jong Heun Lee

doi:10.1016/j.snb.2013.02.008

Selective and sensitive detection of trimethylamine using ZnO-In ₂O₃ composite nanofibers

Chul Soon Lee, Il Doo Kim, Jong Heun Lee

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

116 Citations (Scopus)

Abstract

Three different compositions of ZnO-In₂O₃ composite nanofibers were prepared by electrospinning, and their gas sensing characteristics were compared to those of pure ZnO and In₂O ₃ nanofibers. All ZnO-In₂O₃ composite nanofibers showed high response to trimethylamine (TMA), relatively low cross-response to C₂H₅OH, and negligible cross-responses to CO and H₂; pure ZnO or In₂O₃ nanofibers did not show selective detection of TMA. The maximum responses to 5 ppm TMA of the ZnO-In₂O₃ composite nanofibers with the compositions of [Zn]:[In] = 67:33, 50:50, and 33:67 by at% were 133.9 at 300 °C, 82.9 at 350 °C, and 119.4 at 375 °C, respectively. Considering all the sensing characteristics such as gas response, selectivity, and sensing/recovering kinetics together, the operation of the ZnO-In₂O₃ nanofiber sensor with the composition of [Zn]:[In] = 33:67 by at% at 375 °C was determined to be in optimal condition to detect TMA. The significant enhancement of gas response and selectivity by the formation of composite nanofibers is discussed in relation to the variation of particle size, the formation of hetero-interfaces between ZnO and In₂O₃, and the combination of two sensing materials with different catalytic properties, gas adsorption behaviors, and acid-base properties.

Original language	English
Pages (from-to)	463-470
Number of pages	8
Journal	Sensors and Actuators, B: Chemical
Volume	181
DOIs	https://doi.org/10.1016/j.snb.2013.02.008
Publication status	Published - 2013

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. R0A-2008-000-20032-0).

Copyright:
Copyright 2013 Elsevier B.V., All rights reserved.

Keywords

Electrospinning
Gas sensors
Nanocomposite
Selectivity
ZnO-InO nanofibers

ASJC Scopus subject areas

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.2013.02.008

Cite this

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title = "Selective and sensitive detection of trimethylamine using ZnO-In 2O3 composite nanofibers",

abstract = "Three different compositions of ZnO-In2O3 composite nanofibers were prepared by electrospinning, and their gas sensing characteristics were compared to those of pure ZnO and In2O 3 nanofibers. All ZnO-In2O3 composite nanofibers showed high response to trimethylamine (TMA), relatively low cross-response to C2H5OH, and negligible cross-responses to CO and H2; pure ZnO or In2O3 nanofibers did not show selective detection of TMA. The maximum responses to 5 ppm TMA of the ZnO-In2O3 composite nanofibers with the compositions of [Zn]:[In] = 67:33, 50:50, and 33:67 by at% were 133.9 at 300 °C, 82.9 at 350 °C, and 119.4 at 375 °C, respectively. Considering all the sensing characteristics such as gas response, selectivity, and sensing/recovering kinetics together, the operation of the ZnO-In2O3 nanofiber sensor with the composition of [Zn]:[In] = 33:67 by at% at 375 °C was determined to be in optimal condition to detect TMA. The significant enhancement of gas response and selectivity by the formation of composite nanofibers is discussed in relation to the variation of particle size, the formation of hetero-interfaces between ZnO and In2O3, and the combination of two sensing materials with different catalytic properties, gas adsorption behaviors, and acid-base properties.",

keywords = "Electrospinning, Gas sensors, Nanocomposite, Selectivity, ZnO-InO nanofibers",

author = "Lee, {Chul Soon} and Kim, {Il Doo} and Lee, {Jong Heun}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. R0A-2008-000-20032-0). Copyright: Copyright 2013 Elsevier B.V., All rights reserved.",

year = "2013",

doi = "10.1016/j.snb.2013.02.008",

language = "English",

volume = "181",

pages = "463--470",

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AU - Lee, Chul Soon

AU - Kim, Il Doo

AU - Lee, Jong Heun

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. R0A-2008-000-20032-0). Copyright: Copyright 2013 Elsevier B.V., All rights reserved.

PY - 2013

Y1 - 2013

N2 - Three different compositions of ZnO-In2O3 composite nanofibers were prepared by electrospinning, and their gas sensing characteristics were compared to those of pure ZnO and In2O 3 nanofibers. All ZnO-In2O3 composite nanofibers showed high response to trimethylamine (TMA), relatively low cross-response to C2H5OH, and negligible cross-responses to CO and H2; pure ZnO or In2O3 nanofibers did not show selective detection of TMA. The maximum responses to 5 ppm TMA of the ZnO-In2O3 composite nanofibers with the compositions of [Zn]:[In] = 67:33, 50:50, and 33:67 by at% were 133.9 at 300 °C, 82.9 at 350 °C, and 119.4 at 375 °C, respectively. Considering all the sensing characteristics such as gas response, selectivity, and sensing/recovering kinetics together, the operation of the ZnO-In2O3 nanofiber sensor with the composition of [Zn]:[In] = 33:67 by at% at 375 °C was determined to be in optimal condition to detect TMA. The significant enhancement of gas response and selectivity by the formation of composite nanofibers is discussed in relation to the variation of particle size, the formation of hetero-interfaces between ZnO and In2O3, and the combination of two sensing materials with different catalytic properties, gas adsorption behaviors, and acid-base properties.

AB - Three different compositions of ZnO-In2O3 composite nanofibers were prepared by electrospinning, and their gas sensing characteristics were compared to those of pure ZnO and In2O 3 nanofibers. All ZnO-In2O3 composite nanofibers showed high response to trimethylamine (TMA), relatively low cross-response to C2H5OH, and negligible cross-responses to CO and H2; pure ZnO or In2O3 nanofibers did not show selective detection of TMA. The maximum responses to 5 ppm TMA of the ZnO-In2O3 composite nanofibers with the compositions of [Zn]:[In] = 67:33, 50:50, and 33:67 by at% were 133.9 at 300 °C, 82.9 at 350 °C, and 119.4 at 375 °C, respectively. Considering all the sensing characteristics such as gas response, selectivity, and sensing/recovering kinetics together, the operation of the ZnO-In2O3 nanofiber sensor with the composition of [Zn]:[In] = 33:67 by at% at 375 °C was determined to be in optimal condition to detect TMA. The significant enhancement of gas response and selectivity by the formation of composite nanofibers is discussed in relation to the variation of particle size, the formation of hetero-interfaces between ZnO and In2O3, and the combination of two sensing materials with different catalytic properties, gas adsorption behaviors, and acid-base properties.

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