Photocatalytic Coatings for Air Pollution Reduction
The Indian Institute of Technology (IIT) Madras is investigating the potential of "smog-eating" photocatalytic coatings to tackle air pollution in Delhi as part of a collaboration with the Delhi government.
Project Overview
- The initiative aims to test photocatalytic coatings on public surfaces to reduce pollutants like nitrogen dioxide (NO₂) and volatile organic compounds (VOCs).
- This six-month project is led by Professor Somnath C Roy, funded by the Delhi government.
- Initial laboratory tests will precede field trials in Delhi, with specific locations yet to be determined.
Research Methodology
- Scientists will simulate real-world conditions using data from Delhi, such as traffic patterns and pollution levels.
- The project will assess titanium dioxide (TiO₂)-based surfaces, which react under sunlight, breaking down pollutants.
- Testing will occur under different lighting conditions to reflect Delhi’s smog-affected environment.
Deployment Strategies
- Methods being explored include mixing TiO₂ into concrete and asphalt, and applying it as coatings.
- Potential installations include panels on rooftops or streetlights, similar to solar panels.
Challenges and Considerations
- Wind and dust are significant variables affecting the material's efficacy; periodic cleaning is necessary.
- The technology is not a standalone solution but complements existing pollution-control measures.
- TiO₂ is stable and cost-effective, but the project will determine optimal concentrations for cost estimation.
Conclusion and Future Directions
The project seeks scalable, science-driven solutions for Delhi's air pollution, aiming for long-term implementation alongside other measures. The study's outcomes could substantially influence city-wide deployment strategies.
