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

doi:10.1016/j.snb.2012.01.045

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 journal › Article › peer-review

112 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 language	English
Pages (from-to)	83-89
Number of pages	7
Journal	Sensors and Actuators, B: Chemical
Volume	168
DOIs	https://doi.org/10.1016/j.snb.2012.01.045
Publication status	Published - 2012 Jun 20

Bibliographical note

Funding Information:
This work was supported by KOSEF NRL program grant funded by the Korean government (MEST) (No. R0A-2008-000-20032-0 ) and the Fundamental R&D program for Core Technology of Materials (No. M2008010013 ) funded by Ministry of Knowledge Economy .

Keywords

Gas sensors
H S detection
Hollow spheres
Selectivity
ZnO-CuO

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.2012.01.045

Cite this

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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}",

note = "Funding Information: This work was supported by KOSEF NRL program grant funded by the Korean government (MEST) (No. R0A-2008-000-20032-0 ) and the Fundamental R&D program for Core Technology of Materials (No. M2008010013 ) funded by Ministry of Knowledge Economy . ",

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AU - Kim, Sun Jung

AU - Na, Chan Woong

AU - Hwang, In Sung

AU - Lee, Jong Heun

N1 - Funding Information: This work was supported by KOSEF NRL program grant funded by the Korean government (MEST) (No. R0A-2008-000-20032-0 ) and the Fundamental R&D program for Core Technology of Materials (No. M2008010013 ) funded by Ministry of Knowledge Economy .

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

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