Adsorption

, Volume 15, Issue 2, pp 89–98

Heating effects on morphological and textural characteristics of individual and composite nanooxides

  • V. M. Gun’ko
  • R. Leboda
  • J. Skubiszewska-Zięba
Article

Abstract

Morphological, structural and adsorption characteristics of nanooxides (fumed individual silica, alumina and titania, and composite silica/alumina, silica/titania and alumina/silica/titania) were compared after different treatments (wetting/drying, ball-milling, suspending/drying, heating) at different temperatures (373–1173 K) using low-temperature nitrogen adsorption data. The structural characteristics such as specific surface area (SBET), pore volume (Vp), pore (PSD) and particle (PaSD) size distributions (calculated using self-consisting regularization procedure with respect to both PSD and PaSD), fractality, adsorption energy distributions depend differently on heating temperature because desorption of water molecularly and dissociatively adsorbed at a surface and in bulk of primary nanoparticles occurs over a wide temperature range at different rates. These processes affect both structural and energetic characteristics of nanooxides.

Keywords

Nanooxides Morphology Structural characteristics Adsorption characteristics Temperature effects 

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • V. M. Gun’ko
    • 1
  • R. Leboda
    • 2
  • J. Skubiszewska-Zięba
    • 2
  1. 1.Institute of Surface ChemistryKievUkraine
  2. 2.Faculty of ChemistryMaria Curie-Skłodowska UniversityLublinPoland

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