The enhanced gas sensing characteristics of La2O 3-Doped SnO2by the addition of multi wall carbon nanotubes

Nguyen Van Hieu; Hae Ryong Kim; Jong Heun Lee

doi:10.1166/sl.2011.1465

The enhanced gas sensing characteristics of La₂O ₃-Doped SnO₂by the addition of multi wall carbon nanotubes

Nguyen Van Hieu, Hae Ryong Kim, Jong Heun Lee

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

Abstract

A La-doped SnO₂, (La-SnO₂) nano sol solution containing multi-wall carbon nanotubes (MWCNTs) was prepared by hydrothermal reaction and the gas sensing characteristics of the La-SnO₂/MWCNT composite sensors were investigated at various heat treatment temperatures (HTTs). The MWCNTs were unaffected, partially decomposed, and completely decomposed by the heat treatment at 500, 600, and 700 °C in air, respectively. However, regardless of the HTT variation, the gas responses to C₂H₆OH at 400 °C were increased 1.4-2.5 times by the addition of 0.1 wt% MWCNTs and the sensors showed selective detection to C ₂H₅OH. The mechanisms for the enhancement of gas response are discussed in relation to the decomposition of MWCNTs and its consequent effect on the gas sensing reaction.

Original language	English
Pages (from-to)	283-287
Number of pages	5
Journal	Sensor Letters
Volume	9
Issue number	1
DOIs	https://doi.org/10.1166/sl.2011.1465
Publication status	Published - 2011

Keywords

Carbon nanotubes
Ethanol sensor

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

Access to Document

10.1166/sl.2011.1465

Cite this

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title = "The enhanced gas sensing characteristics of La2O 3-Doped SnO2by the addition of multi wall carbon nanotubes",

abstract = "A La-doped SnO2, (La-SnO2) nano sol solution containing multi-wall carbon nanotubes (MWCNTs) was prepared by hydrothermal reaction and the gas sensing characteristics of the La-SnO2/MWCNT composite sensors were investigated at various heat treatment temperatures (HTTs). The MWCNTs were unaffected, partially decomposed, and completely decomposed by the heat treatment at 500, 600, and 700 °C in air, respectively. However, regardless of the HTT variation, the gas responses to C2H6OH at 400 °C were increased 1.4-2.5 times by the addition of 0.1 wt% MWCNTs and the sensors showed selective detection to C 2H5OH. The mechanisms for the enhancement of gas response are discussed in relation to the decomposition of MWCNTs and its consequent effect on the gas sensing reaction.",

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AB - A La-doped SnO2, (La-SnO2) nano sol solution containing multi-wall carbon nanotubes (MWCNTs) was prepared by hydrothermal reaction and the gas sensing characteristics of the La-SnO2/MWCNT composite sensors were investigated at various heat treatment temperatures (HTTs). The MWCNTs were unaffected, partially decomposed, and completely decomposed by the heat treatment at 500, 600, and 700 °C in air, respectively. However, regardless of the HTT variation, the gas responses to C2H6OH at 400 °C were increased 1.4-2.5 times by the addition of 0.1 wt% MWCNTs and the sensors showed selective detection to C 2H5OH. The mechanisms for the enhancement of gas response are discussed in relation to the decomposition of MWCNTs and its consequent effect on the gas sensing reaction.

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