About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Energy Materials for Sustainable Development
|
| Presentation Title |
Photoexcitation-Induced Point Defects in BaTiO3 and TiO2 Nanostructures |
| Author(s) |
Guillem Vives Ollé, Thomas Berger, Gilles Bourret, Oliver Diwald |
| On-Site Speaker (Planned) |
Guillem Vives Ollé |
| Abstract Scope |
Titanium dioxide (TiO2) particle-based systems are efficient photocatalysts for CO2 photoconversion into valuable molecules under UV irradiation. However, their practical application remains constrained by short charge carrier lifetimes, a persistent challenge in materials design. Barium titanate (BaTiO3) emerges as a promising candidate to address this limitation, as its spontaneous polarization can extend the lifetime of electron-hole pairs. For real-world implementation, understanding the influence of ferroelectric properties on charge separation in photoexcited solids is critically needed.
In this work, we investigate how nanoparticle processing during the preparation of functional materials influences the formation of unintended charge-trapping sites. Thin TiO2 and BaTiO3 nanoparticle films will be compared against their nanoparticle counterparts. Using Electron Paramagnetic Resonance (EPR) spectroscopy, the synthesized structures will be studied regarding the formation and location of the most prominent photo-induced point defects.
This contribution highlights the role of defect engineering in the preparation of functional photocatalytic materials. |