Gas sensitivity enhancement of WO3 nano-rods by gold nanoparticles

M. Takács, D. Zámbó, A. Deák, A. Pap, I. Bársony

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Tungsten oxide nano-rods were prepared by acidic precipitation from sodium tungstate solution and sensitized with gold nanoparticles prepared by Turkevich method from tetrachloroauric acid trihydrate. In order to prevent aggregation the gold nanoparticles of 18 nm characteristic size were stabilized by methoxy-polyethylene glycol (mPEG-SH) and mixed with hexagonal WO3. Suspension drops of doped and non-doped WO3were deposited on micro-hotplates with interdigitated gold electrodes to measure sensing layer conductivity. Sensor responses of pure and doped WO3were measured for NH3and H2S in synthetic air up to 100 ppm at the operation temperature of 140-200 °C. The presence of gold nanoparticles significantly increased the sensitivity for H2S, whereas for NH3the response was not affected. Test results are compared in terms of sensitivity, response time and operating temperature.

Original languageEnglish
Pages (from-to)1128-1131
Number of pages4
JournalUnknown Journal
Volume120
DOIs
Publication statusPublished - 2015

Fingerprint

Gold
Nanoparticles
Gases
Polyethylene glycols
Tungsten
Agglomeration
Sodium
Temperature
Electrodes
Oxides
Acids
Sensors
Air

Keywords

  • Gas sensing
  • Gold nanoparticles
  • Hexagonal WO

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Gas sensitivity enhancement of WO3 nano-rods by gold nanoparticles. / Takács, M.; Zámbó, D.; Deák, A.; Pap, A.; Bársony, I.

In: Unknown Journal, Vol. 120, 2015, p. 1128-1131.

Research output: Contribution to journalArticle

@article{2790303652d44b4984025eaa909764b6,
title = "Gas sensitivity enhancement of WO3 nano-rods by gold nanoparticles",
abstract = "Tungsten oxide nano-rods were prepared by acidic precipitation from sodium tungstate solution and sensitized with gold nanoparticles prepared by Turkevich method from tetrachloroauric acid trihydrate. In order to prevent aggregation the gold nanoparticles of 18 nm characteristic size were stabilized by methoxy-polyethylene glycol (mPEG-SH) and mixed with hexagonal WO3. Suspension drops of doped and non-doped WO3were deposited on micro-hotplates with interdigitated gold electrodes to measure sensing layer conductivity. Sensor responses of pure and doped WO3were measured for NH3and H2S in synthetic air up to 100 ppm at the operation temperature of 140-200 °C. The presence of gold nanoparticles significantly increased the sensitivity for H2S, whereas for NH3the response was not affected. Test results are compared in terms of sensitivity, response time and operating temperature.",
keywords = "Gas sensing, Gold nanoparticles, Hexagonal WO",
author = "M. Tak{\'a}cs and D. Z{\'a}mb{\'o} and A. De{\'a}k and A. Pap and I. B{\'a}rsony",
year = "2015",
doi = "10.1016/j.proeng.2015.08.813",
language = "English",
volume = "120",
pages = "1128--1131",
journal = "[No source information available]",
issn = "0402-1215",

}

TY - JOUR

T1 - Gas sensitivity enhancement of WO3 nano-rods by gold nanoparticles

AU - Takács, M.

AU - Zámbó, D.

AU - Deák, A.

AU - Pap, A.

AU - Bársony, I.

PY - 2015

Y1 - 2015

N2 - Tungsten oxide nano-rods were prepared by acidic precipitation from sodium tungstate solution and sensitized with gold nanoparticles prepared by Turkevich method from tetrachloroauric acid trihydrate. In order to prevent aggregation the gold nanoparticles of 18 nm characteristic size were stabilized by methoxy-polyethylene glycol (mPEG-SH) and mixed with hexagonal WO3. Suspension drops of doped and non-doped WO3were deposited on micro-hotplates with interdigitated gold electrodes to measure sensing layer conductivity. Sensor responses of pure and doped WO3were measured for NH3and H2S in synthetic air up to 100 ppm at the operation temperature of 140-200 °C. The presence of gold nanoparticles significantly increased the sensitivity for H2S, whereas for NH3the response was not affected. Test results are compared in terms of sensitivity, response time and operating temperature.

AB - Tungsten oxide nano-rods were prepared by acidic precipitation from sodium tungstate solution and sensitized with gold nanoparticles prepared by Turkevich method from tetrachloroauric acid trihydrate. In order to prevent aggregation the gold nanoparticles of 18 nm characteristic size were stabilized by methoxy-polyethylene glycol (mPEG-SH) and mixed with hexagonal WO3. Suspension drops of doped and non-doped WO3were deposited on micro-hotplates with interdigitated gold electrodes to measure sensing layer conductivity. Sensor responses of pure and doped WO3were measured for NH3and H2S in synthetic air up to 100 ppm at the operation temperature of 140-200 °C. The presence of gold nanoparticles significantly increased the sensitivity for H2S, whereas for NH3the response was not affected. Test results are compared in terms of sensitivity, response time and operating temperature.

KW - Gas sensing

KW - Gold nanoparticles

KW - Hexagonal WO

UR - http://www.scopus.com/inward/record.url?scp=84984935657&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84984935657&partnerID=8YFLogxK

U2 - 10.1016/j.proeng.2015.08.813

DO - 10.1016/j.proeng.2015.08.813

M3 - Article

AN - SCOPUS:84984935657

VL - 120

SP - 1128

EP - 1131

JO - [No source information available]

JF - [No source information available]

SN - 0402-1215

ER -