Gas sensing characteristics of polycrystalline SnO2 nanowires prepared by polyol method

Ji Hye Park; Jong Heun Lee

doi:10.1016/j.snb.2008.10.002

Gas sensing characteristics of polycrystalline SnO₂ nanowires prepared by polyol method

Ji Hye Park, Jong Heun Lee

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

42 Citations (Scopus)

Abstract

Sn-precursor nanowires (NWs) were prepared by refluxing a solution containing tin oxalate (SnC₂O₄) and ethylene glycol. The precursor NWs were heat-treated at 600 °C, which successfully transformed them into SnO₂ NWs without undergoing any morphological change. The morphology of the SnO₂ NWs could be manipulated either by controlling the SnC₂O₄ concentration or by adding easily reducible noble metal salts, such as PdCl₃, AgNO₃ or RuCl₃·H₂O. The thicker and shorter SnO₂ NWs, which resulted from the use of a high SnC₂O₄ concentration during the preparation, showed lower gas sensitivity due to their decreased gas sensing surface area. The addition of catalytically active Pd, Ag, or Ru not only changed the gas sensitivity but also significantly shortened the gas recovery times. The gas sensing characteristics of the SnO₂ NWs were related to the NW morphology and, when applicable, the catalyst used.

Original language	English
Pages (from-to)	151-157
Number of pages	7
Journal	Sensors and Actuators, B: Chemical
Volume	136
Issue number	1
DOIs	https://doi.org/10.1016/j.snb.2008.10.002
Publication status	Published - 2009 Feb 2

Keywords

Catalyst
Polycrystalline SnO nanowires
Polyol method
Recovery time

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.2008.10.002

Cite this

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title = "Gas sensing characteristics of polycrystalline SnO2 nanowires prepared by polyol method",

abstract = "Sn-precursor nanowires (NWs) were prepared by refluxing a solution containing tin oxalate (SnC2O4) and ethylene glycol. The precursor NWs were heat-treated at 600 °C, which successfully transformed them into SnO2 NWs without undergoing any morphological change. The morphology of the SnO2 NWs could be manipulated either by controlling the SnC2O4 concentration or by adding easily reducible noble metal salts, such as PdCl3, AgNO3 or RuCl3·H2O. The thicker and shorter SnO2 NWs, which resulted from the use of a high SnC2O4 concentration during the preparation, showed lower gas sensitivity due to their decreased gas sensing surface area. The addition of catalytically active Pd, Ag, or Ru not only changed the gas sensitivity but also significantly shortened the gas recovery times. The gas sensing characteristics of the SnO2 NWs were related to the NW morphology and, when applicable, the catalyst used.",

keywords = "Catalyst, Polycrystalline SnO nanowires, Polyol method, Recovery time",

author = "Park, {Ji Hye} and Lee, {Jong Heun}",

note = "Funding Information: This work was supported by the Korea Science and Engineering Foundation (KOSEF) NRL program grant funded by the Korea government (MEST) (No. R0A-2008-000-20032-0) and the IT R&D program of MKE/IITA [2006-S-078-03, Environmental Sensing and Alerting System with Nano-Wire and Nano-tube]. ",

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AU - Park, Ji Hye

AU - Lee, Jong Heun

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N2 - Sn-precursor nanowires (NWs) were prepared by refluxing a solution containing tin oxalate (SnC2O4) and ethylene glycol. The precursor NWs were heat-treated at 600 °C, which successfully transformed them into SnO2 NWs without undergoing any morphological change. The morphology of the SnO2 NWs could be manipulated either by controlling the SnC2O4 concentration or by adding easily reducible noble metal salts, such as PdCl3, AgNO3 or RuCl3·H2O. The thicker and shorter SnO2 NWs, which resulted from the use of a high SnC2O4 concentration during the preparation, showed lower gas sensitivity due to their decreased gas sensing surface area. The addition of catalytically active Pd, Ag, or Ru not only changed the gas sensitivity but also significantly shortened the gas recovery times. The gas sensing characteristics of the SnO2 NWs were related to the NW morphology and, when applicable, the catalyst used.

AB - Sn-precursor nanowires (NWs) were prepared by refluxing a solution containing tin oxalate (SnC2O4) and ethylene glycol. The precursor NWs were heat-treated at 600 °C, which successfully transformed them into SnO2 NWs without undergoing any morphological change. The morphology of the SnO2 NWs could be manipulated either by controlling the SnC2O4 concentration or by adding easily reducible noble metal salts, such as PdCl3, AgNO3 or RuCl3·H2O. The thicker and shorter SnO2 NWs, which resulted from the use of a high SnC2O4 concentration during the preparation, showed lower gas sensitivity due to their decreased gas sensing surface area. The addition of catalytically active Pd, Ag, or Ru not only changed the gas sensitivity but also significantly shortened the gas recovery times. The gas sensing characteristics of the SnO2 NWs were related to the NW morphology and, when applicable, the catalyst used.

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