Ionic liquid-supported synthesis of CeO 2 nanoparticles and its enhanced ethanol gas sensing properties

Dung Van Dao, Thuy T.D. Nguyen, Sanjit M. Majhi, Ganpurev Adilbish, Hu Jun Lee, Yeon Tae Yu, In-Hwan Lee

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Reducing the particle size of ceria nanostrutures could provide an efficient approach to improve gas sensing properties thereof. Here, we synthesized small CeO 2 nanoparticles (3–5 nm) in the support of [EMIM][Tf 2 N] ionic liquid. The obtained CeO 2 nanoparticles showed relatively large surface areas (68.29 m 3 /g) and especially high content of Ce 3+ ions (13.5%), which increase the chemisorption of reagents and oxygen leading on enhancing gas sensing performance. Namely, at the optimal operating temperature of 400 °C, the gas response of synthesized CeO 2 sensor to 100 ppm of ethanol was 2.3, which was 1.83 times higher than that of commercial one (1.26). The superior gas sensing mechanism of synthesized CeO 2 was also discussed on the basis of the electrical resistance change. The present work could provide novel pathway to synthesize ceria and related materials, which would be possibly expected to be potential candidates for gas sensing, by the use of ionic liquid hereafter.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalMaterials Chemistry and Physics
Volume231
DOIs
Publication statusPublished - 2019 Jun 1

Keywords

  • Ceria
  • Gas sensor
  • Ionic liquid
  • Nanoparticles

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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