Synthesis and electrochemical properties of biporous α-fe 2o3 superstructures

Ramakrishnan Amutha, Gang Juan Lee, Jerry J. Wu, Marappan Sathish, Mika E.T. Sillanpaa

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Biporous microsphere, flower and concaved cuboctahedrans like α-Fe2O3 superstructures have been synthesized by using a new synthetic method. Hydrothermal reaction of ferric chloride with potassium thiocyanate at 200 C yields self-assembled microsphere, flower, and concaved cuboctahedrans like intermediates in ethanol, water:ethanol (1:1) mixed solvent and in water, respectively. These intermediates were further converted into corresponding α-Fe2O3 in a thermal decomposition process at 600 C under oxygen atmospheric conditions. The influence of solvent, hydrothermal temperature, and concentration of iron precursors on the intermediate morphology was studied, and the growth mechanism has also been proposed. The synthesized intermediates and α- Fe2O3 were characterized using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), high resolution transmission electron microscopy (HR-TEM) and nitrogen adsorption analysis. The FE-SEM results indicated formation of biporous flowerlike morphology. The electrochemical properties of the flowerlike α- Fe2O3 electrodes in a Li-ion battery have been investigated. Plausible formation mechanisms of these intermediates were proposed.

Original languageEnglish
Pages (from-to)6635-6643
Number of pages9
JournalJournal of Nanoscience and Nanotechnology
Issue number10
Publication statusPublished - Oct 2013
Externally publishedYes


  • Hematite
  • Li-Ion Battery.
  • Porous Materials
  • Thermal Decomposition

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • Biomedical Engineering
  • General Materials Science
  • Condensed Matter Physics


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