Synthesis of SnO2 nanowires their structural and H2 gas sensing properties

E. M. El-Maghraby, Ahsanulhaq Qurashi, Toshinari Yamazaki

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

SnO2 nanowires were prepared on bare oxidized silicon, Au and SnO2-coated substrates by thermal evaporation of tin grains in argon atmosphere at 900° C. X-ray diffraction (XRD) and field-emission scanning electron microscopy (FE-SEM) were used to characterize the SnO2 nanowires. FE-SEM images indicated that the size of SnO2 nanowires depend on the type of substrate. Gas sensor was fabricated by dispersing SnO2 nanowires on an interdigitated Pt-electrode. H2 gas sensing properties of these sensors made of nanowires prepared on three different substrates were measured at various operating temperatures and concentrations respectively. SnO2 nanowires deposited on Au-coated substrates showed the highest sensitivity of 11.5 at 100°C upon exposure to H2 gas of 1000 ppm.

Original languageBritish English
Pages (from-to)8475-8480
Number of pages6
JournalCeramics International
Volume39
Issue number7
DOIs
StatePublished - Sep 2013

Keywords

  • Gas sensor
  • Hydrogen
  • Nanowires
  • SnO

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