What are the Challenges Associated with Nanostructured TiO₂?
Despite its advantages, nanostructured TiO₂ faces several challenges:
- Recombination of Charge Carriers: In photocatalysis, the recombination of photo-generated electrons and holes can reduce efficiency. - Limited Absorption Spectrum: TiO₂ primarily absorbs UV light, which constitutes only a small fraction of the solar spectrum. Efforts are being made to extend its absorption into the visible range. - Stability and Durability: Maintaining the stability and durability of nanostructured TiO₂ under operational conditions is crucial for long-term applications. - Environmental and Health Concerns: The potential toxicity and environmental impact of nanoparticles need to be thoroughly assessed.
