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

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• 作者：J. P. Cheng ; Anas Shereef ; Kimberly A. Gray ; Jinsong Wu
• 关键词：Cobalt oxide ; Photocatalytic activity ; Acetaldehyde ; Environmental effects
• 刊名：Journal of Nanoparticle Research
• 出版年：2015
• 出版时间：March 2015
• 年：2015
• 卷：17
• 期：3
• 全文大小：2,384 KB
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• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Nanotechnology
  Inorganic Chemistry
  Characterization and Evaluation Materials
  Physical Chemistry
  Applied Optics, Optoelectronics and Optical Devices
  
• 出版者：Springer Netherlands
• ISSN：1572-896X

文摘

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.