Facile Synthesis of p-type Perovskite SrTi0.65Fe 0.35O3-δ Nanofibers Prepared by Electrospinning and Their Oxygen-Sensing Properties

Seung Hoon Choi, Seon Jin Choi, Byoung Koun Min, Woon Young Lee, Jin Seong Park, Il Doo Kim

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Quaternary p-type SrTi0.65Fe0.35O3-δ (STFO) nanofibers with diameters ranging from 70 to 500 nm were synthesized via electrospinning and subsequent calcination at 750 °C. The STFO fibers showed single perovskite structure and polycrystalline fiber morphologies composed of small nanocrystallites in the range of 10-12 nm. The semiconducting oxygen sensor using STFO fiber network exhibited a wide temperature-independence of resistance (≈12 ± 4 kΩ) that exceeded the range of 600-950 °C, high oxygen response (RO2/RN2= 4.08 at 20% O 2), and a fast response time (t = 2.1 s at 20% O2) upon cyclic oxygen exposure. These superior properties were attributed to the high surface-to-volume ratio of STFO fiber network and the effective diffusion of oxygen gas onto highly porous STFO-sensing layers. Quaternary p-type SrTi 0.65Fe0.35O3- δ (STFO) nanofibers with polycrystalline structure are synthesized via electrospinning and used as high-sensitivity oxygen-sensing layers.

Original languageEnglish
Pages (from-to)521-527
Number of pages7
JournalMacromolecular Materials and Engineering
Volume298
Issue number5
DOIs
Publication statusPublished - 2013 May 1

Fingerprint

Electrospinning
Nanofibers
Perovskite
Oxygen
Fibers
Oxygen sensors
Nanocrystallites
Calcination
Gases
perovskite
Temperature

Keywords

  • electrospinning
  • nanofibers
  • oxygen sensors
  • SrTiFe O

ASJC Scopus subject areas

  • Organic Chemistry
  • Materials Chemistry
  • Polymers and Plastics
  • Chemical Engineering(all)

Cite this

Facile Synthesis of p-type Perovskite SrTi0.65Fe 0.35O3-δ Nanofibers Prepared by Electrospinning and Their Oxygen-Sensing Properties. / Choi, Seung Hoon; Choi, Seon Jin; Min, Byoung Koun; Lee, Woon Young; Park, Jin Seong; Kim, Il Doo.

In: Macromolecular Materials and Engineering, Vol. 298, No. 5, 01.05.2013, p. 521-527.

Research output: Contribution to journalArticle

Choi, Seung Hoon ; Choi, Seon Jin ; Min, Byoung Koun ; Lee, Woon Young ; Park, Jin Seong ; Kim, Il Doo. / Facile Synthesis of p-type Perovskite SrTi0.65Fe 0.35O3-δ Nanofibers Prepared by Electrospinning and Their Oxygen-Sensing Properties. In: Macromolecular Materials and Engineering. 2013 ; Vol. 298, No. 5. pp. 521-527.
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