Sol-gel synthesis, characterisation, and photocatalytic activity of porous spinel Co3O4 nanosheets

Manoj Pudukudy, Zahira Yaakob

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Mesoporous spinel Co3O4 nanosheets were synthesised via a simple sol-gel route using the Pluronic P123 triblock copolymer as the stabilising agent. Their structural, morphological, and textural properties were characterised. FTIR spectrum revealed the formation of cobalt oxide without any surface adsorbed impurities. Face centered cubic phase of spinel Co 3O4 with the mean crystalline size of 26 nm was assigned by the X-ray diffraction analysis without the formation of other phases. Porous nanosheets and cave-like morphologies were identified from the scanning electron microscopy (SEM) images. Highly agglomerated more or less spherical particles with well separated lattice fringes, representing the oriented growth of nanocrystals, were noticed on the transmission electron microscopy photographs. Surface area analysis revealed that the spinel has high surface area of about 25 m2 g-1 with monomodal mesoporosity. The average pore size distribution was found to be about 15.8 nm. The as-prepared spinel photocatalyst showed a mild photocatalytic activity in the degradation of methylene blue (2.5 mg L-1) under UV light irradiation with air as the oxidising agent. Photocatalytic activity of the as-prepared reusable Co 3O4 was found to be higher than that of the commercial spinel powder.

Original languageEnglish
Pages (from-to)1087-1096
Number of pages10
JournalChemical Papers
Volume68
Issue number8
DOIs
Publication statusPublished - 2014

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Nanosheets
Polymethyl Methacrylate
Sol-gels
Gels
Caves
Photocatalysts
Crystal lattices
Ultraviolet radiation
Nanocrystals
X ray diffraction analysis
Block copolymers
Pore size
Cobalt
Irradiation
Impurities
Excipients
Crystalline materials
Methylene Blue
Transmission electron microscopy
Powders

Keywords

  • photodegradation
  • porous nanosheets
  • reusability
  • sol-gel synthesis

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Biochemistry
  • Industrial and Manufacturing Engineering
  • Materials Chemistry

Cite this

Sol-gel synthesis, characterisation, and photocatalytic activity of porous spinel Co3O4 nanosheets. / Pudukudy, Manoj; Yaakob, Zahira.

In: Chemical Papers, Vol. 68, No. 8, 2014, p. 1087-1096.

Research output: Contribution to journalArticle

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