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Updated: Jun 19, 2026
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The Effect of Interfacial Chemical Bonding in TiO2-SiO2 Composites on Their Photocatalytic NOx Abatement Performance
Published on: July 4, 2017
Organic solvent-dispersed TiO(2) nanoparticle characterization.
YuanQiao Rao1, Brian Antalek, John Minter
1Kodak Research Laboratories, Eastman Kodak Company, Rochester, New York 14650-2132, USA.
Langmuir : the ACS Journal of Surfaces and Colloids
|October 28, 2009
Summary
Anatase titanium dioxide nanoparticles were coated with organic ligands, creating high-refractive-index materials. This study details a comprehensive analytical approach for characterizing these advanced nanomaterials.
Area of Science:
- Materials Science
- Nanotechnology
- Surface Chemistry
Background:
- Anatase titanium dioxide (TiO2) nanoparticles are crucial in various applications.
- Surface modification of TiO2 is essential for tailored properties.
- Developing robust analytical methods for surface-treated nanoparticles is challenging.
Purpose of the Study:
- To derivatize anatase TiO2 nanoparticles with (3-methacryloxypropyl)trimethoxysilane.
- To characterize the structure, thickness, and morphology of surface-treated TiO2 nanoparticles and their organic coatings.
- To present a multi-technique analytical methodology for anisotropic organic-inorganic nanoparticles.
Main Methods:
- Transmission Electron Microscopy (TEM) and X-ray Diffraction (XRD) for core particle characterization.
- Nuclear Magnetic Resonance (NMR), Quasielastic Light Scattering (QELS), and Size-Exclusion Chromatography (SEC) for organic component analysis.
- Atomic Force Microscopy (AFM) for characterizing thin, high-refractive-index coatings.
Main Results:
- Characterization of titania platelets with a modal diameter of 9.8 nm and thickness of ~1.5 nm.
- Determination of a 1.5-1.9 nm thick organic ligand layer on the nanoparticles.
- Detection of a significant population of 2 nm siloxane oligomers.
Conclusions:
- A combination of analytical techniques provides comprehensive data on surface-modified nanoparticles.
- The developed methodology is effective for characterizing anisotropic organic-inorganic nanoparticles.
- The findings offer insights into the structure and properties of TiO2-based nanomaterials for advanced applications.
