One-pot hydrothermal synthesis of CuO-ZnO composite hollow spheres for selective H 2S detection

Sun Jung Kim, Chan Woong Na, In Sung Hwang, Jong Heun Lee

Research output: Contribution to journalArticle

70 Citations (Scopus)

Abstract

Pure ZnO and CuO-ZnO composite hollow spheres were prepared by one-pot, glucose-mediated hydrothermal reaction with subsequent heat treatment. The pure ZnO hollow spheres could selectively detect C 2H 5OH at 475 °C. The CuO-ZnO hollow spheres prepared from the solutions with the compositions of [Cu 2+]/([Cu 2+] + [Zn 2+]) = 0.02 and 0.04 showed high responses to 5 ppm H 2S (R a/R g = 13.3 and 32.4, R a: resistance in air, R g: resistance in gas) with negligible cross responses to 100 ppm C 2H 5OH, C 3H 8, CO and H 2 (R a/R g = 1.4-1.8) at 336°C. They also showed selective C 2H 5OH detection at 475°C. The dual selective detection of H 2S and C 2H 5OH by the composite particles was due to electrochemical interactions with H 2S of nano-scale p(CuO)-n(ZnO) junctions within the hollow spheres.

Original languageEnglish
Pages (from-to)83-89
Number of pages7
JournalSensors and Actuators, B: Chemical
Volume168
DOIs
Publication statusPublished - 2012 Jun 20

Fingerprint

Hydrothermal synthesis
hollow
composite materials
Composite materials
synthesis
Carbon Monoxide
glucose
Glucose
heat treatment
Gases
Heat treatment
air
Air
Chemical analysis
gases
interactions

Keywords

  • Gas sensors
  • H S detection
  • Hollow spheres
  • Selectivity
  • ZnO-CuO

ASJC Scopus subject areas

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

Cite this

One-pot hydrothermal synthesis of CuO-ZnO composite hollow spheres for selective H 2S detection. / Kim, Sun Jung; Na, Chan Woong; Hwang, In Sung; Lee, Jong Heun.

In: Sensors and Actuators, B: Chemical, Vol. 168, 20.06.2012, p. 83-89.

Research output: Contribution to journalArticle

@article{dc47f52adf0b4575b03c48ff61d15592,
title = "One-pot hydrothermal synthesis of CuO-ZnO composite hollow spheres for selective H 2S detection",
abstract = "Pure ZnO and CuO-ZnO composite hollow spheres were prepared by one-pot, glucose-mediated hydrothermal reaction with subsequent heat treatment. The pure ZnO hollow spheres could selectively detect C 2H 5OH at 475 °C. The CuO-ZnO hollow spheres prepared from the solutions with the compositions of [Cu 2+]/([Cu 2+] + [Zn 2+]) = 0.02 and 0.04 showed high responses to 5 ppm H 2S (R a/R g = 13.3 and 32.4, R a: resistance in air, R g: resistance in gas) with negligible cross responses to 100 ppm C 2H 5OH, C 3H 8, CO and H 2 (R a/R g = 1.4-1.8) at 336°C. They also showed selective C 2H 5OH detection at 475°C. The dual selective detection of H 2S and C 2H 5OH by the composite particles was due to electrochemical interactions with H 2S of nano-scale p(CuO)-n(ZnO) junctions within the hollow spheres.",
keywords = "Gas sensors, H S detection, Hollow spheres, Selectivity, ZnO-CuO",
author = "Kim, {Sun Jung} and Na, {Chan Woong} and Hwang, {In Sung} and Lee, {Jong Heun}",
year = "2012",
month = "6",
day = "20",
doi = "10.1016/j.snb.2012.01.045",
language = "English",
volume = "168",
pages = "83--89",
journal = "Sensors and Actuators, B: Chemical",
issn = "0925-4005",
publisher = "Elsevier",

}

TY - JOUR

T1 - One-pot hydrothermal synthesis of CuO-ZnO composite hollow spheres for selective H 2S detection

AU - Kim, Sun Jung

AU - Na, Chan Woong

AU - Hwang, In Sung

AU - Lee, Jong Heun

PY - 2012/6/20

Y1 - 2012/6/20

N2 - Pure ZnO and CuO-ZnO composite hollow spheres were prepared by one-pot, glucose-mediated hydrothermal reaction with subsequent heat treatment. The pure ZnO hollow spheres could selectively detect C 2H 5OH at 475 °C. The CuO-ZnO hollow spheres prepared from the solutions with the compositions of [Cu 2+]/([Cu 2+] + [Zn 2+]) = 0.02 and 0.04 showed high responses to 5 ppm H 2S (R a/R g = 13.3 and 32.4, R a: resistance in air, R g: resistance in gas) with negligible cross responses to 100 ppm C 2H 5OH, C 3H 8, CO and H 2 (R a/R g = 1.4-1.8) at 336°C. They also showed selective C 2H 5OH detection at 475°C. The dual selective detection of H 2S and C 2H 5OH by the composite particles was due to electrochemical interactions with H 2S of nano-scale p(CuO)-n(ZnO) junctions within the hollow spheres.

AB - Pure ZnO and CuO-ZnO composite hollow spheres were prepared by one-pot, glucose-mediated hydrothermal reaction with subsequent heat treatment. The pure ZnO hollow spheres could selectively detect C 2H 5OH at 475 °C. The CuO-ZnO hollow spheres prepared from the solutions with the compositions of [Cu 2+]/([Cu 2+] + [Zn 2+]) = 0.02 and 0.04 showed high responses to 5 ppm H 2S (R a/R g = 13.3 and 32.4, R a: resistance in air, R g: resistance in gas) with negligible cross responses to 100 ppm C 2H 5OH, C 3H 8, CO and H 2 (R a/R g = 1.4-1.8) at 336°C. They also showed selective C 2H 5OH detection at 475°C. The dual selective detection of H 2S and C 2H 5OH by the composite particles was due to electrochemical interactions with H 2S of nano-scale p(CuO)-n(ZnO) junctions within the hollow spheres.

KW - Gas sensors

KW - H S detection

KW - Hollow spheres

KW - Selectivity

KW - ZnO-CuO

UR - http://www.scopus.com/inward/record.url?scp=84861575531&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84861575531&partnerID=8YFLogxK

U2 - 10.1016/j.snb.2012.01.045

DO - 10.1016/j.snb.2012.01.045

M3 - Article

AN - SCOPUS:84861575531

VL - 168

SP - 83

EP - 89

JO - Sensors and Actuators, B: Chemical

JF - Sensors and Actuators, B: Chemical

SN - 0925-4005

ER -