Highly sensitive and fast responding CO sensor using SnO2 nanosheets

Chang Sup Moon; Hae Ryong Kim; Graeme Auchterlonie; John Drennan; Jong Heun Lee

doi:10.1016/j.snb.2007.12.040

Highly sensitive and fast responding CO sensor using SnO₂ nanosheets

Chang Sup Moon, Hae Ryong Kim, Graeme Auchterlonie, John Drennan, Jong Heun Lee

Research output: Contribution to journal › Article › peer-review

146 Citations (Scopus)

Abstract

A highly sensitive and fast responding CO sensor was fabricated from a sheet-like SnO₂. The SnO sheets were prepared by a room temperature reaction between SnCl₂, hydrazine and NaOH, and they were subsequently oxidized into SnO₂ sheets at high temperature (600 °C). The morphology and size of the SnO₂ sheets could be controlled during the formation of SnO, which influence the sensor response (R_a/R_g) and response time to a great extent. The sensor response of SnO nanosheets to 10 ppm CO was enhanced up to 2.34, and the 90% sensor response time could be reduced to 6 s, which are significantly higher and shorter than those of SnO₂ powders (1.57 and 88 s), respectively. The realization of both a high sensitivity and rapid response were explained in terms of rapid gas diffusion onto the entire sensing surface due to the less-agglomerated and very thin structure of SnO₂ nanosheets and the catalytic effect of Pt.

Original language	English
Pages (from-to)	556-564
Number of pages	9
Journal	Sensors and Actuators, B: Chemical
Volume	131
Issue number	2
DOIs	https://doi.org/10.1016/j.snb.2007.12.040
Publication status	Published - 2008 May 14

Keywords

Gas sensor
Nanosheets
SnO
SnO
Solution reduction method

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

Access to Document

10.1016/j.snb.2007.12.040

Cite this

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title = "Highly sensitive and fast responding CO sensor using SnO2 nanosheets",

abstract = "A highly sensitive and fast responding CO sensor was fabricated from a sheet-like SnO2. The SnO sheets were prepared by a room temperature reaction between SnCl2, hydrazine and NaOH, and they were subsequently oxidized into SnO2 sheets at high temperature (600 °C). The morphology and size of the SnO2 sheets could be controlled during the formation of SnO, which influence the sensor response (Ra/Rg) and response time to a great extent. The sensor response of SnO nanosheets to 10 ppm CO was enhanced up to 2.34, and the 90% sensor response time could be reduced to 6 s, which are significantly higher and shorter than those of SnO2 powders (1.57 and 88 s), respectively. The realization of both a high sensitivity and rapid response were explained in terms of rapid gas diffusion onto the entire sensing surface due to the less-agglomerated and very thin structure of SnO2 nanosheets and the catalytic effect of Pt.",

keywords = "Gas sensor, Nanosheets, SnO, SnO, Solution reduction method",

author = "Moon, {Chang Sup} and Kim, {Hae Ryong} and Graeme Auchterlonie and John Drennan and Lee, {Jong Heun}",

note = "Funding Information: This work was supported in part by the IT R&D program of MIC/IITA (2007-S-078-02, Environmental Sensing and Alerting System with Nanowire and Nano-tube). We thank for government for financial supports. ",

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AU - Moon, Chang Sup

AU - Kim, Hae Ryong

AU - Auchterlonie, Graeme

AU - Drennan, John

AU - Lee, Jong Heun

N1 - Funding Information: This work was supported in part by the IT R&D program of MIC/IITA (2007-S-078-02, Environmental Sensing and Alerting System with Nanowire and Nano-tube). We thank for government for financial supports.

PY - 2008/5/14

Y1 - 2008/5/14

N2 - A highly sensitive and fast responding CO sensor was fabricated from a sheet-like SnO2. The SnO sheets were prepared by a room temperature reaction between SnCl2, hydrazine and NaOH, and they were subsequently oxidized into SnO2 sheets at high temperature (600 °C). The morphology and size of the SnO2 sheets could be controlled during the formation of SnO, which influence the sensor response (Ra/Rg) and response time to a great extent. The sensor response of SnO nanosheets to 10 ppm CO was enhanced up to 2.34, and the 90% sensor response time could be reduced to 6 s, which are significantly higher and shorter than those of SnO2 powders (1.57 and 88 s), respectively. The realization of both a high sensitivity and rapid response were explained in terms of rapid gas diffusion onto the entire sensing surface due to the less-agglomerated and very thin structure of SnO2 nanosheets and the catalytic effect of Pt.

AB - A highly sensitive and fast responding CO sensor was fabricated from a sheet-like SnO2. The SnO sheets were prepared by a room temperature reaction between SnCl2, hydrazine and NaOH, and they were subsequently oxidized into SnO2 sheets at high temperature (600 °C). The morphology and size of the SnO2 sheets could be controlled during the formation of SnO, which influence the sensor response (Ra/Rg) and response time to a great extent. The sensor response of SnO nanosheets to 10 ppm CO was enhanced up to 2.34, and the 90% sensor response time could be reduced to 6 s, which are significantly higher and shorter than those of SnO2 powders (1.57 and 88 s), respectively. The realization of both a high sensitivity and rapid response were explained in terms of rapid gas diffusion onto the entire sensing surface due to the less-agglomerated and very thin structure of SnO2 nanosheets and the catalytic effect of Pt.

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