Facile synthesis of mesoporous α-Mn2O3 microspheres via morphology conserved thermal decomposition of MnCO3 microspheres

Manoj Pudukudy, Zahira Yaakob, Ramesh Rajendran

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

In this article, we report on the synthesis and characterisation of novel mesoporous α-Mn2O3 microspheres obtained by the thermal decomposition of hydrothermally grown MnCO3. The porous, hierarchical Mn2O3 microspheres were obtained without the use of any structural directing agents or templates. The self-sacrificing template character of the hydrothermally grown MnCO3 is clearly presented here. Body centred cubic phase pure crystalline structure of Mn 2O3 was acquired at 600 °C, whereas a minor Mn 3O4 phase was detected at 500 °C. The microsphere-like morphology of the intermediate precursor and the final products was clearly observed in the field emission scanning electron microscopy (FESEM) images, which depicted the morphology conserved thermal decomposition process. Roughly spherical and elongated Mn2O3 sub-nanoparticles were hierarchically gathered inside the microspheres, which points to the development of a mesoporous texture, as confirmed by the transmission electron microscopy (TEM) and porosity studies. The optical properties studied using photoluminescence spectroscopy indicated its applications under UV-light.

Original languageEnglish
Pages (from-to)85-89
Number of pages5
JournalMaterials Letters
Volume136
DOIs
Publication statusPublished - 1 Dec 2014

Fingerprint

Microspheres
thermal decomposition
Pyrolysis
templates
synthesis
field emission
textures
porosity
photoluminescence
optical properties
nanoparticles
transmission electron microscopy
scanning electron microscopy
Photoluminescence spectroscopy
products
Ultraviolet radiation
Field emission
spectroscopy
Optical properties
Textures

Keywords

  • Crystal structure
  • Electron microscopy
  • Hydrothermal synthesis
  • Nanoparticles

ASJC Scopus subject areas

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

Cite this

Facile synthesis of mesoporous α-Mn2O3 microspheres via morphology conserved thermal decomposition of MnCO3 microspheres. / Pudukudy, Manoj; Yaakob, Zahira; Rajendran, Ramesh.

In: Materials Letters, Vol. 136, 01.12.2014, p. 85-89.

Research output: Contribution to journalArticle

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