Template-free synthesis of self-assembled Co3O4 micro/nanocrystals

R. Amutha, S. Akilandeswari, M. Muruganandham, Mika Sillanpää, Bashir Ahmmad, Takahiro Ohkubo

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

In this article, we have reported the fabrication of various morphological porous Co3O4 by thermal decomposition of cobalt oxalate at open atmospheric conditions. Uniform cobalt oxalate microrods and microneedles were synthesized without using any surfactants or templates in large scale. The cobalt oxalate preparation method was played a crucial role on the crystal structure and its morphology. The as prepared cobalt oxalates and its corresponding cobalt oxides were characterized by using the thermogravimetric analysis, X-ray diffraction (XRD), field-emission scanning electron microscope (FE-SEM), transmission electron microscopy (TEM) and nitrogen adsorption analysis. The XRD results indicated that the orthorhombic and monoclinic cobalt oxalates were formed in different experimental conditions. The influence of preparation method of cobalt oxalates and cobalt precursors on the final morphology has been investigated. The M-H loop of the Co3O 4 porous microrods and microneedles showed the presence of paramagnetic properties at room temperatures. A plausible mechanism of both cobalt oxalates and Co3O4 formation was proposed based on the experimental results.

Original languageEnglish
Pages (from-to)3171-3179
Number of pages9
JournalJournal of Nanoscience and Nanotechnology
Volume11
Issue number4
DOIs
Publication statusPublished - 2011

Fingerprint

cobalt oxalates
Oxalates
Cobalt
Nanoparticles
Nanocrystals
nanocrystals
templates
synthesis
X-Ray Diffraction
preparation
cobalt oxides
X ray diffraction
meteorology
diffraction
thermal decomposition
Transmission Electron Microscopy
field emission
Surface-Active Agents
Field emission
Adsorption

Keywords

  • CoO
  • Cobalt Oxalate
  • Magnetic Properties
  • Self-Assembly
  • Thermal Decomposition

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Chemistry(all)
  • Materials Science(all)
  • Bioengineering
  • Biomedical Engineering

Cite this

Amutha, R., Akilandeswari, S., Muruganandham, M., Sillanpää, M., Ahmmad, B., & Ohkubo, T. (2011). Template-free synthesis of self-assembled Co3O4 micro/nanocrystals. Journal of Nanoscience and Nanotechnology, 11(4), 3171-3179. https://doi.org/10.1166/jnn.2011.3848

Template-free synthesis of self-assembled Co3O4 micro/nanocrystals. / Amutha, R.; Akilandeswari, S.; Muruganandham, M.; Sillanpää, Mika; Ahmmad, Bashir; Ohkubo, Takahiro.

In: Journal of Nanoscience and Nanotechnology, Vol. 11, No. 4, 2011, p. 3171-3179.

Research output: Contribution to journalArticle

Amutha, R, Akilandeswari, S, Muruganandham, M, Sillanpää, M, Ahmmad, B & Ohkubo, T 2011, 'Template-free synthesis of self-assembled Co3O4 micro/nanocrystals', Journal of Nanoscience and Nanotechnology, vol. 11, no. 4, pp. 3171-3179. https://doi.org/10.1166/jnn.2011.3848
Amutha, R. ; Akilandeswari, S. ; Muruganandham, M. ; Sillanpää, Mika ; Ahmmad, Bashir ; Ohkubo, Takahiro. / Template-free synthesis of self-assembled Co3O4 micro/nanocrystals. In: Journal of Nanoscience and Nanotechnology. 2011 ; Vol. 11, No. 4. pp. 3171-3179.
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