Ultrasensitive and selective C2H5OH sensors using Rh-loaded In2O3 hollow spheres

Sun Jung Kim, In Sung Hwang, Chan Woong Na, Il Doo Kim, Yun Chan Kang, Jong Heun Lee

Research output: Contribution to journalArticle

72 Citations (Scopus)

Abstract

Rh-loaded In2O3 hollow spheres with diameters of ∼2 μm were prepared by a one-pot hydrothermal reaction of aqueous solution containing indium nitrate, rhodium chloride, and glucose and subsequent heat treatment at 500 °C for 2 h. The response to 100 ppm C 2H5OH (Ra/Rg, Ra: resistance in air, Rg: resistance in gas) of 1.67 at% Rh-loaded In2O3 hollow spheres was 4748, which was ∼180 times higher than that of pure In2O3 hollow spheres. Rh loading decreased the temperature for maximum gas response from 475 °C to 371 °C, which also enhanced the selectivity to C2H5OH 15.1-24.7 times and recovery speed. The ultrahigh sensitivity and selectivity to C2H5OH, the lower sensing temperature, and the reduced recovery time were attributed to electronic interactions between Rh and In 2O3 and the promotion of catalytic dissociation of C 2H5OH into reactive gases.

Original languageEnglish
Pages (from-to)18560-18567
Number of pages8
JournalJournal of Materials Chemistry
Volume21
Issue number46
DOIs
Publication statusPublished - 2011 Dec 14

Fingerprint

Gases
Sensors
Recovery
Rhodium
Indium
Glucose
Chlorides
Nitrates
Heat treatment
Temperature
Air
indium nitrate

ASJC Scopus subject areas

  • Materials Chemistry
  • Chemistry(all)

Cite this

Ultrasensitive and selective C2H5OH sensors using Rh-loaded In2O3 hollow spheres. / Kim, Sun Jung; Hwang, In Sung; Na, Chan Woong; Kim, Il Doo; Kang, Yun Chan; Lee, Jong Heun.

In: Journal of Materials Chemistry, Vol. 21, No. 46, 14.12.2011, p. 18560-18567.

Research output: Contribution to journalArticle

Kim, Sun Jung ; Hwang, In Sung ; Na, Chan Woong ; Kim, Il Doo ; Kang, Yun Chan ; Lee, Jong Heun. / Ultrasensitive and selective C2H5OH sensors using Rh-loaded In2O3 hollow spheres. In: Journal of Materials Chemistry. 2011 ; Vol. 21, No. 46. pp. 18560-18567.
@article{56e5e8c386734f2f9e9b0056d2e4214c,
title = "Ultrasensitive and selective C2H5OH sensors using Rh-loaded In2O3 hollow spheres",
abstract = "Rh-loaded In2O3 hollow spheres with diameters of ∼2 μm were prepared by a one-pot hydrothermal reaction of aqueous solution containing indium nitrate, rhodium chloride, and glucose and subsequent heat treatment at 500 °C for 2 h. The response to 100 ppm C 2H5OH (Ra/Rg, Ra: resistance in air, Rg: resistance in gas) of 1.67 at{\%} Rh-loaded In2O3 hollow spheres was 4748, which was ∼180 times higher than that of pure In2O3 hollow spheres. Rh loading decreased the temperature for maximum gas response from 475 °C to 371 °C, which also enhanced the selectivity to C2H5OH 15.1-24.7 times and recovery speed. The ultrahigh sensitivity and selectivity to C2H5OH, the lower sensing temperature, and the reduced recovery time were attributed to electronic interactions between Rh and In 2O3 and the promotion of catalytic dissociation of C 2H5OH into reactive gases.",
author = "Kim, {Sun Jung} and Hwang, {In Sung} and Na, {Chan Woong} and Kim, {Il Doo} and Kang, {Yun Chan} and Lee, {Jong Heun}",
year = "2011",
month = "12",
day = "14",
doi = "10.1039/c1jm14252f",
language = "English",
volume = "21",
pages = "18560--18567",
journal = "Journal of Materials Chemistry",
issn = "0959-9428",
publisher = "Royal Society of Chemistry",
number = "46",

}

TY - JOUR

T1 - Ultrasensitive and selective C2H5OH sensors using Rh-loaded In2O3 hollow spheres

AU - Kim, Sun Jung

AU - Hwang, In Sung

AU - Na, Chan Woong

AU - Kim, Il Doo

AU - Kang, Yun Chan

AU - Lee, Jong Heun

PY - 2011/12/14

Y1 - 2011/12/14

N2 - Rh-loaded In2O3 hollow spheres with diameters of ∼2 μm were prepared by a one-pot hydrothermal reaction of aqueous solution containing indium nitrate, rhodium chloride, and glucose and subsequent heat treatment at 500 °C for 2 h. The response to 100 ppm C 2H5OH (Ra/Rg, Ra: resistance in air, Rg: resistance in gas) of 1.67 at% Rh-loaded In2O3 hollow spheres was 4748, which was ∼180 times higher than that of pure In2O3 hollow spheres. Rh loading decreased the temperature for maximum gas response from 475 °C to 371 °C, which also enhanced the selectivity to C2H5OH 15.1-24.7 times and recovery speed. The ultrahigh sensitivity and selectivity to C2H5OH, the lower sensing temperature, and the reduced recovery time were attributed to electronic interactions between Rh and In 2O3 and the promotion of catalytic dissociation of C 2H5OH into reactive gases.

AB - Rh-loaded In2O3 hollow spheres with diameters of ∼2 μm were prepared by a one-pot hydrothermal reaction of aqueous solution containing indium nitrate, rhodium chloride, and glucose and subsequent heat treatment at 500 °C for 2 h. The response to 100 ppm C 2H5OH (Ra/Rg, Ra: resistance in air, Rg: resistance in gas) of 1.67 at% Rh-loaded In2O3 hollow spheres was 4748, which was ∼180 times higher than that of pure In2O3 hollow spheres. Rh loading decreased the temperature for maximum gas response from 475 °C to 371 °C, which also enhanced the selectivity to C2H5OH 15.1-24.7 times and recovery speed. The ultrahigh sensitivity and selectivity to C2H5OH, the lower sensing temperature, and the reduced recovery time were attributed to electronic interactions between Rh and In 2O3 and the promotion of catalytic dissociation of C 2H5OH into reactive gases.

UR - http://www.scopus.com/inward/record.url?scp=81255184482&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=81255184482&partnerID=8YFLogxK

U2 - 10.1039/c1jm14252f

DO - 10.1039/c1jm14252f

M3 - Article

VL - 21

SP - 18560

EP - 18567

JO - Journal of Materials Chemistry

JF - Journal of Materials Chemistry

SN - 0959-9428

IS - 46

ER -