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 journalArticle

63 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 languageEnglish
Pages (from-to)934-942
Number of pages9
JournalSensors and Actuators, B: Chemical
Volume209
DOIs
Publication statusPublished - 2015 Mar 31

Fingerprint

pulse heating
Nanofibers
p-n junctions
Heating
sensors
Sensors
gases
Gases
room temperature
selectivity
recovery
interference
air
Electrospinning
Carbon Monoxide
Specific surface area
Recovery
Temperature
Air

Keywords

  • CuO-loaded InO
  • Electrospinning
  • Gas sensors
  • HS
  • Nanofibers
  • Pulse heating

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Metals and Alloys
  • Surfaces, Coatings and Films
  • Materials Chemistry
  • Instrumentation

Cite this

Ultrasensitive and ultraselective detection of H2S using electrospun CuO-loaded In2O3 nanofiber sensors assisted by pulse heating. / Liang, Xishuang; Kim, Tae Hyung; Yoon, Ji Wook; Kwak, Chang Hoon; Lee, Jong Heun.

In: Sensors and Actuators, B: Chemical, Vol. 209, 31.03.2015, p. 934-942.

Research output: Contribution to journalArticle

@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}",
year = "2015",
month = "3",
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

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

UR - http://www.scopus.com/inward/record.url?scp=84920164169&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84920164169&partnerID=8YFLogxK

U2 - 10.1016/j.snb.2014.11.130

DO - 10.1016/j.snb.2014.11.130

M3 - Article

VL - 209

SP - 934

EP - 942

JO - Sensors and Actuators, B: Chemical

JF - Sensors and Actuators, B: Chemical

SN - 0925-4005

ER -