Development of hierarchically porous cobalt oxide for enhanced photo-oxidation of indoor pollutants

J. P. Cheng*, Anas Shereef, Kimberly A. Gray, Jinsong Wu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Porous cobalt oxide was successfully prepared by precipitation of cobalt hydroxide followed by low temperature thermal decomposition. The morphologies of the resultant oxides remained as the corresponding hydroxides, although the morphology of cobalt hydroxides was greatly influenced by the precursor salts. The cobalt oxides with average crystal size less than 20 nm were characterized by X-ray diffraction, scanning electron microscope, BET surface area, and XPS analysis. The photocatalytic activities of the various cobalt oxides morphologies were investigated by comparing the photo-degradation of acetaldehyde under simulated solar illumination. Relative to their low order structures and reference titania samples, the hierarchical nanostructures of cobalt oxide showed excellent abilities to rapidly degrade acetaldehyde, a model air pollutant. This was attributed to the unique nature of these hierarchical cobalt oxide nanoassemblies, which contained many catalytically active reaction sites and open pores.

Original languageEnglish (US)
JournalJournal of Nanoparticle Research
Issue number3
StatePublished - Mar 2015


  • Acetaldehyde
  • Cobalt oxide
  • Environmental effects
  • Photocatalytic activity

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Atomic and Molecular Physics, and Optics
  • Modeling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics


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