Synthesis of sodium cobalt oxide submicron tubules using citric acid-based sol-gel route assisted by porous aluminum oxide membrane

Chia-Jyi Liu, Long Jiann Shih, Hsueh Jung Huang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We report synthesis of the sodium cobalt oxide γ-Na xCoO2 submicron tubules using the citric acid-based sol-gel route with the assistance of commercial porous anodized aluminium oxide (AAO) membrane with a nominal pore size of 200nm as supporting templates. The y-NaxCoO2 submicron tubules can be obtained at 500°C using a rapid-heat-up procedure and held for 30 min. The submicron tubules have a diameter of 200-250 nm. The products are investigated using various techniques including powder x-ray diffraction, field emission scanning electron microscope and transmission electron microscope. The atomic ratio of Na/Co of they-Na xCoO2 submicron tubules is determined using energy dispersive x-ray spectra. The atomic ratio of Na/Co tends to be less than 0.5 due to the tendency of Na+ de-intercalating from its parent structure during the tubules collecting process.

Original languageEnglish
Title of host publicationThermoelectric Materials 2010 - Growth, Properties, Novel Characterization Methods and Applications
Pages293-298
Number of pages6
Publication statusPublished - 2010 Dec 24
Event2010 MRS Spring Meeting - San Francisco, CA, United States
Duration: 2010 Apr 52010 Apr 9

Publication series

NameMaterials Research Society Symposium Proceedings
Volume1267
ISSN (Print)0272-9172

Other

Other2010 MRS Spring Meeting
CountryUnited States
CitySan Francisco, CA
Period10-04-0510-04-09

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Liu, C-J., Shih, L. J., & Huang, H. J. (2010). Synthesis of sodium cobalt oxide submicron tubules using citric acid-based sol-gel route assisted by porous aluminum oxide membrane. In Thermoelectric Materials 2010 - Growth, Properties, Novel Characterization Methods and Applications (pp. 293-298). (Materials Research Society Symposium Proceedings; Vol. 1267).