Highly discriminative and sensitive detection of volatile organic compounds for monitoring indoor air quality using pure and Au-loaded 2D In2O3 inverse opal thin films

Chul Soon Lee, Zhengfei Dai, Do Hong Kim, Hua Yao Li, Young Moo Jo, Bo Young Kim, Hyung Gi Byun, Insung Hwang, Jong Heun Lee

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The lack of gas selectivity in oxide semiconductor chemiresistors has long been an obstacle to realizing discriminative detection of indoor volatile organic compounds (VOCs) with different health impacts. A simple and reliable algorithm to discriminate between critically harmful aromatic VOCs (benzene, xylene, and toluene) and less harmful ethanol is suggested by the simple combination of sensor signals from pure In2O3 and Au-loaded In2O3 2D inverse opal (IO) thin films prepared by heat-treating the precursor-dipped self-assembled polystyrene templates and Au deposition. The Au-loaded In2O3 IO sensor showed unprecedentedly high responses to 5 ppm ethanol (resistance ratio = 1640.2) and comparably high responses to 5 ppm benzene, p-xylene, and toluene (resistance ratio range of 674.5–1012.9). Such high gas responses were attributed to the periodically porous and thus highly gas-accessible structures, while the clear discrimination between aromatic VOCs and ethanol was achieved by tuning gas selectivity through systematic control of the size, morphology, and loading concentration of Au nano-catalysts. The results of this study can be used for reliable and precise monitoring of indoor air pollutants.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalSensors and Actuators, B: Chemical
Volume273
DOIs
Publication statusPublished - 2018 Nov 10

Fingerprint

Volatile Organic Compounds
air quality
volatile organic compounds
Volatile organic compounds
Air quality
Gases
Thin films
Ethanol
ethyl alcohol
Monitoring
Toluene
xylene
Xylene
thin films
Benzene
gases
toluene
selectivity
benzene
Xylenes

Keywords

  • 2-D inverse opal
  • Aromatic volatile organic compound
  • Au-loaded InO
  • Gas sensor
  • Indoor air quality
  • Oxide semiconductor

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

Cite this

Highly discriminative and sensitive detection of volatile organic compounds for monitoring indoor air quality using pure and Au-loaded 2D In2O3 inverse opal thin films. / Lee, Chul Soon; Dai, Zhengfei; Kim, Do Hong; Li, Hua Yao; Jo, Young Moo; Kim, Bo Young; Byun, Hyung Gi; Hwang, Insung; Lee, Jong Heun.

In: Sensors and Actuators, B: Chemical, Vol. 273, 10.11.2018, p. 1-8.

Research output: Contribution to journalArticle

Lee, Chul Soon ; Dai, Zhengfei ; Kim, Do Hong ; Li, Hua Yao ; Jo, Young Moo ; Kim, Bo Young ; Byun, Hyung Gi ; Hwang, Insung ; Lee, Jong Heun. / Highly discriminative and sensitive detection of volatile organic compounds for monitoring indoor air quality using pure and Au-loaded 2D In2O3 inverse opal thin films. In: Sensors and Actuators, B: Chemical. 2018 ; Vol. 273. pp. 1-8.
@article{749c45ed3ba748cc9017ffe6db1a80df,
title = "Highly discriminative and sensitive detection of volatile organic compounds for monitoring indoor air quality using pure and Au-loaded 2D In2O3 inverse opal thin films",
abstract = "The lack of gas selectivity in oxide semiconductor chemiresistors has long been an obstacle to realizing discriminative detection of indoor volatile organic compounds (VOCs) with different health impacts. A simple and reliable algorithm to discriminate between critically harmful aromatic VOCs (benzene, xylene, and toluene) and less harmful ethanol is suggested by the simple combination of sensor signals from pure In2O3 and Au-loaded In2O3 2D inverse opal (IO) thin films prepared by heat-treating the precursor-dipped self-assembled polystyrene templates and Au deposition. The Au-loaded In2O3 IO sensor showed unprecedentedly high responses to 5 ppm ethanol (resistance ratio = 1640.2) and comparably high responses to 5 ppm benzene, p-xylene, and toluene (resistance ratio range of 674.5–1012.9). Such high gas responses were attributed to the periodically porous and thus highly gas-accessible structures, while the clear discrimination between aromatic VOCs and ethanol was achieved by tuning gas selectivity through systematic control of the size, morphology, and loading concentration of Au nano-catalysts. The results of this study can be used for reliable and precise monitoring of indoor air pollutants.",
keywords = "2-D inverse opal, Aromatic volatile organic compound, Au-loaded InO, Gas sensor, Indoor air quality, Oxide semiconductor",
author = "Lee, {Chul Soon} and Zhengfei Dai and Kim, {Do Hong} and Li, {Hua Yao} and Jo, {Young Moo} and Kim, {Bo Young} and Byun, {Hyung Gi} and Insung Hwang and Lee, {Jong Heun}",
year = "2018",
month = "11",
day = "10",
doi = "10.1016/j.snb.2018.06.011",
language = "English",
volume = "273",
pages = "1--8",
journal = "Sensors and Actuators, B: Chemical",
issn = "0925-4005",
publisher = "Elsevier",

}

TY - JOUR

T1 - Highly discriminative and sensitive detection of volatile organic compounds for monitoring indoor air quality using pure and Au-loaded 2D In2O3 inverse opal thin films

AU - Lee, Chul Soon

AU - Dai, Zhengfei

AU - Kim, Do Hong

AU - Li, Hua Yao

AU - Jo, Young Moo

AU - Kim, Bo Young

AU - Byun, Hyung Gi

AU - Hwang, Insung

AU - Lee, Jong Heun

PY - 2018/11/10

Y1 - 2018/11/10

N2 - The lack of gas selectivity in oxide semiconductor chemiresistors has long been an obstacle to realizing discriminative detection of indoor volatile organic compounds (VOCs) with different health impacts. A simple and reliable algorithm to discriminate between critically harmful aromatic VOCs (benzene, xylene, and toluene) and less harmful ethanol is suggested by the simple combination of sensor signals from pure In2O3 and Au-loaded In2O3 2D inverse opal (IO) thin films prepared by heat-treating the precursor-dipped self-assembled polystyrene templates and Au deposition. The Au-loaded In2O3 IO sensor showed unprecedentedly high responses to 5 ppm ethanol (resistance ratio = 1640.2) and comparably high responses to 5 ppm benzene, p-xylene, and toluene (resistance ratio range of 674.5–1012.9). Such high gas responses were attributed to the periodically porous and thus highly gas-accessible structures, while the clear discrimination between aromatic VOCs and ethanol was achieved by tuning gas selectivity through systematic control of the size, morphology, and loading concentration of Au nano-catalysts. The results of this study can be used for reliable and precise monitoring of indoor air pollutants.

AB - The lack of gas selectivity in oxide semiconductor chemiresistors has long been an obstacle to realizing discriminative detection of indoor volatile organic compounds (VOCs) with different health impacts. A simple and reliable algorithm to discriminate between critically harmful aromatic VOCs (benzene, xylene, and toluene) and less harmful ethanol is suggested by the simple combination of sensor signals from pure In2O3 and Au-loaded In2O3 2D inverse opal (IO) thin films prepared by heat-treating the precursor-dipped self-assembled polystyrene templates and Au deposition. The Au-loaded In2O3 IO sensor showed unprecedentedly high responses to 5 ppm ethanol (resistance ratio = 1640.2) and comparably high responses to 5 ppm benzene, p-xylene, and toluene (resistance ratio range of 674.5–1012.9). Such high gas responses were attributed to the periodically porous and thus highly gas-accessible structures, while the clear discrimination between aromatic VOCs and ethanol was achieved by tuning gas selectivity through systematic control of the size, morphology, and loading concentration of Au nano-catalysts. The results of this study can be used for reliable and precise monitoring of indoor air pollutants.

KW - 2-D inverse opal

KW - Aromatic volatile organic compound

KW - Au-loaded InO

KW - Gas sensor

KW - Indoor air quality

KW - Oxide semiconductor

UR - http://www.scopus.com/inward/record.url?scp=85048527759&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85048527759&partnerID=8YFLogxK

U2 - 10.1016/j.snb.2018.06.011

DO - 10.1016/j.snb.2018.06.011

M3 - Article

AN - SCOPUS:85048527759

VL - 273

SP - 1

EP - 8

JO - Sensors and Actuators, B: Chemical

JF - Sensors and Actuators, B: Chemical

SN - 0925-4005

ER -