Novel sea urchin-like hollow core-shell SnO2 superstructures: Facile synthesis and excellent ethanol sensing performance

Shunqiang Liu, Mingjiang Xie, Yanxing Li, Xuefeng Guo*, Weijie Ji, Weiping Ding, Chak Tong AU

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

51 Citations (Scopus)

Abstract

Novel hierarchical sea urchin-like hollow core-shell SnO2 superstructures have been fabricated by a template-free hydrothermal method, based on an inside-out Ostwald ripening mechanism. For comparison, hollow SnO2 spheres were also prepared. It is found that the sea urchin-like hollow core-shell SnO2 superstructures exhibit nearly three times better response to ethanol than the hollow SnO2 spheres. The superior sensing performance is plausibly originated from the unique hierarchical core-shell structure with the nano-sized spikes (5-15 nm in diameter) on the shells.

Original languageEnglish
Pages (from-to)229-235
Number of pages7
JournalSensors and Actuators, B: Chemical
Volume151
Issue number1
DOIs
Publication statusPublished - 26 Nov 2010

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

User-Defined Keywords

  • Gas sensor
  • Ostwald ripening
  • Superstructure
  • Tin dioxide
  • Urchin

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