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Updated: Jun 14, 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
Study of titanium oxide sol-gel condensation using small angle X-ray scattering
Bruno Pattier1, Mark Henderson, Guillaume Brotons
1Laboratoire de Physique de l'Etat Condensé, UMR CNRS 6087, Université du Maine, Avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France.
The Journal of Physical Chemistry. B
|April 9, 2010
Summary
Transparent titanium oxychloride (TiOCl2) gels form fractal networks. Small-angle X-ray scattering reveals building block sizes and fractal dimensions, with domain size dependent on annealing time and titanium concentration.
Area of Science:
- Materials Science
- Chemistry
- Physics
Background:
- Transparent gels are synthesized from titanium oxychloride (TiOCl2) in N,N-dimethylformamide (DMF) and water.
- The sol-gel transformation is crucial for understanding inorganic polymer formation.
Purpose of the Study:
- To investigate the sol-gel transformation of TiOCl2 using small-angle X-ray scattering (SAXS).
- To determine the structural properties of the resulting transparent gels, including fractal dimensions and particle sizes.
Main Methods:
- Small-angle X-ray scattering (SAXS) was employed to study the gelation process.
- SAXS data were modeled using the Burford and Beaucage models for quantitative analysis.
Main Results:
- Fractal dimensions of the gel network ranged from 1.75 to 2.2.
- The radius of gyration of the primary particles (building blocks) was consistently around 0.46 nm.
- Homogeneous domain size showed an incubation time before rapid growth at high titanium concentrations.
Conclusions:
- The study provides quantitative insights into the fractal nature of TiOCl2 gels.
- Annealing time and titanium concentration significantly influence the gel's structural evolution and aggregate growth.
