Related Experiment Video
Updated: Jul 14, 2026
08:43
Molten-Salt Synthesis of Complex Metal Oxide Nanoparticles
Published on: October 27, 2018
Surface structure and properties of mixed fumed oxides
V M Gun'ko1, J P Blitz, K Gude
1Institute of Surface Chemistry, 17 General Naumov Street, Kiev 03164, Ukraine. gun@voliacable.com
Journal of Colloid and Interface Science
|June 16, 2007
Summary
This study characterizes fumed oxides like silica and alumina, revealing complex interactions between surface composition and water adsorption. Surface phase and structural properties dictate water desorption and immersion heat, influencing material behavior.
Area of Science:
- Materials Science
- Surface Chemistry
- Nanotechnology
Background:
- Fumed oxides (silica, alumina, titania) exhibit diverse surface properties.
- Mixed oxides (silica/alumina, silica/titania, alumina/silica/titania) present complex structural and compositional variations.
Purpose of the Study:
- To characterize various fumed oxides and mixed oxide systems.
- To investigate the relationship between surface characteristics and water interaction properties.
Main Methods:
- Fourier Transform Infrared Spectroscopy (FTIR)
- Nuclear Magnetic Resonance (NMR)
- Auger Electron Spectroscopy
- One-Pass Temperature-Programmed Desorption with Mass Spectrometry (OP TPDMS)
- Microcalorimetry
- Nitrogen Adsorption (BET surface area)
Main Results:
- Nonlinear changes in surface alumina/titania content and specific surface area were observed with increasing oxide content.
- Complex dependencies of heat of immersion in water and water desorption on heating were found.
- Surface phase composition and hydroxyl concentration significantly influence water-related properties.
Conclusions:
- At low second-phase content, structural characteristics (e.g., BET surface area) are predominant in determining water interaction.
- At high second-phase content, surface phase composition becomes the more dominant factor influencing water interaction.
