Ultrasensitive and ultraselective detection of H2S using electrospun CuO-loaded In2O3 nanofiber sensors assisted by pulse heating

Xishuang Liang; Tae Hyung Kim; Ji Wook Yoon; Chang Hoon Kwak; Jong Heun Lee

doi:10.1016/j.snb.2014.11.130

Ultrasensitive and ultraselective detection of H₂S using electrospun CuO-loaded In₂O₃ nanofiber sensors assisted by pulse heating

Xishuang Liang, Tae Hyung Kim, Ji Wook Yoon, Chang Hoon Kwak, Jong Heun Lee

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

94 Citations (Scopus)

Abstract

Pure and CuO-loaded In₂O₃ nanofibers were prepared by electrospinning and their H₂S sensing characteristics were investigated. The loading of CuO on In₂O₃ nanofibers significantly enhanced the gas response (ratio of the resistance in air to that in gas) toward 5 ppm H₂S from 515 to 1.16 × 10⁵ at 150 °C. The CuO-loaded In₂O₃ nanofibers also exhibited high gas response (9.17 × 10³ toward 5 ppm H₂S) at room temperature. The CuO-loaded In₂O₃ nanofibers showed ultrahigh selectivity to H₂S concerning interferences with NO₂, H₂, CO, NH₃, C₂H₅OH, C₃H₆O, TMA, C₇H₈, and C₈H₁₀ at room temperature and 150 °C. The operation of the sensor using pulse heating was suggested reliable H₂S sensing with complete recovery. The ultrasensitivie and ultraselective H₂S sensing characteristics are explained in terms of the creation and disruption of p-n junctions in the presence and absence of H₂S, respectively, the high specific surface area provided by the networks of one-dimensional polycrystalline nanofibers, and the abundance of p-n junctions due to the uniform mixing between p-CuO and n-In₂O₃ nanograins within the nanofibers.

Original language	English
Pages (from-to)	934-942
Number of pages	9
Journal	Sensors and Actuators, B: Chemical
Volume	209
DOIs	https://doi.org/10.1016/j.snb.2014.11.130
Publication status	Published - 2015 Mar 31

Keywords

CuO-loaded InO
Electrospinning
Gas sensors
HS
Nanofibers
Pulse heating

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

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10.1016/j.snb.2014.11.130

Cite this

@article{68556a9b4e4c4998b3dfd920ea3b90f4,

title = "Ultrasensitive and ultraselective detection of H2S using electrospun CuO-loaded In2O3 nanofiber sensors assisted by pulse heating",

abstract = "Pure and CuO-loaded In2O3 nanofibers were prepared by electrospinning and their H2S sensing characteristics were investigated. The loading of CuO on In2O3 nanofibers significantly enhanced the gas response (ratio of the resistance in air to that in gas) toward 5 ppm H2S from 515 to 1.16 × 105 at 150 °C. The CuO-loaded In2O3 nanofibers also exhibited high gas response (9.17 × 103 toward 5 ppm H2S) at room temperature. The CuO-loaded In2O3 nanofibers showed ultrahigh selectivity to H2S concerning interferences with NO2, H2, CO, NH3, C2H5OH, C3H6O, TMA, C7H8, and C8H10 at room temperature and 150 °C. The operation of the sensor using pulse heating was suggested reliable H2S sensing with complete recovery. The ultrasensitivie and ultraselective H2S sensing characteristics are explained in terms of the creation and disruption of p-n junctions in the presence and absence of H2S, respectively, the high specific surface area provided by the networks of one-dimensional polycrystalline nanofibers, and the abundance of p-n junctions due to the uniform mixing between p-CuO and n-In2O3 nanograins within the nanofibers.",

keywords = "CuO-loaded InO, Electrospinning, Gas sensors, HS, Nanofibers, Pulse heating",

author = "Xishuang Liang and Kim, {Tae Hyung} and Yoon, {Ji Wook} and Kwak, {Chang Hoon} and Lee, {Jong Heun}",

note = "Funding Information: This work was supported by the Deanship of Scientific Research (DSR), King Abdulaziz University , under grant No. 2-135-36-HiCi and a National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2013R1A2A1A01006545 ). Publisher Copyright: {\textcopyright} 2014 Elsevier B.V. All rights reserved. Copyright: Copyright 2015 Elsevier B.V., All rights reserved.",

year = "2015",

month = mar,

day = "31",

doi = "10.1016/j.snb.2014.11.130",

language = "English",

volume = "209",

pages = "934--942",

journal = "Sensors and Actuators, B: Chemical",

issn = "0925-4005",

publisher = "Elsevier",

}

TY - JOUR

T1 - Ultrasensitive and ultraselective detection of H2S using electrospun CuO-loaded In2O3 nanofiber sensors assisted by pulse heating

AU - Liang, Xishuang

AU - Kim, Tae Hyung

AU - Yoon, Ji Wook

AU - Kwak, Chang Hoon

AU - Lee, Jong Heun

N1 - Funding Information: This work was supported by the Deanship of Scientific Research (DSR), King Abdulaziz University , under grant No. 2-135-36-HiCi and a National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2013R1A2A1A01006545 ). Publisher Copyright: © 2014 Elsevier B.V. All rights reserved. Copyright: Copyright 2015 Elsevier B.V., All rights reserved.

PY - 2015/3/31

Y1 - 2015/3/31

N2 - Pure and CuO-loaded In2O3 nanofibers were prepared by electrospinning and their H2S sensing characteristics were investigated. The loading of CuO on In2O3 nanofibers significantly enhanced the gas response (ratio of the resistance in air to that in gas) toward 5 ppm H2S from 515 to 1.16 × 105 at 150 °C. The CuO-loaded In2O3 nanofibers also exhibited high gas response (9.17 × 103 toward 5 ppm H2S) at room temperature. The CuO-loaded In2O3 nanofibers showed ultrahigh selectivity to H2S concerning interferences with NO2, H2, CO, NH3, C2H5OH, C3H6O, TMA, C7H8, and C8H10 at room temperature and 150 °C. The operation of the sensor using pulse heating was suggested reliable H2S sensing with complete recovery. The ultrasensitivie and ultraselective H2S sensing characteristics are explained in terms of the creation and disruption of p-n junctions in the presence and absence of H2S, respectively, the high specific surface area provided by the networks of one-dimensional polycrystalline nanofibers, and the abundance of p-n junctions due to the uniform mixing between p-CuO and n-In2O3 nanograins within the nanofibers.

AB - Pure and CuO-loaded In2O3 nanofibers were prepared by electrospinning and their H2S sensing characteristics were investigated. The loading of CuO on In2O3 nanofibers significantly enhanced the gas response (ratio of the resistance in air to that in gas) toward 5 ppm H2S from 515 to 1.16 × 105 at 150 °C. The CuO-loaded In2O3 nanofibers also exhibited high gas response (9.17 × 103 toward 5 ppm H2S) at room temperature. The CuO-loaded In2O3 nanofibers showed ultrahigh selectivity to H2S concerning interferences with NO2, H2, CO, NH3, C2H5OH, C3H6O, TMA, C7H8, and C8H10 at room temperature and 150 °C. The operation of the sensor using pulse heating was suggested reliable H2S sensing with complete recovery. The ultrasensitivie and ultraselective H2S sensing characteristics are explained in terms of the creation and disruption of p-n junctions in the presence and absence of H2S, respectively, the high specific surface area provided by the networks of one-dimensional polycrystalline nanofibers, and the abundance of p-n junctions due to the uniform mixing between p-CuO and n-In2O3 nanograins within the nanofibers.

KW - CuO-loaded InO

KW - Electrospinning

KW - Gas sensors

KW - HS

KW - Nanofibers

KW - Pulse heating

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U2 - 10.1016/j.snb.2014.11.130

DO - 10.1016/j.snb.2014.11.130

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VL - 209

SP - 934

EP - 942

JO - Sensors and Actuators, B: Chemical

JF - Sensors and Actuators, B: Chemical

SN - 0925-4005

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