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News: The Delhi government has announced a feasibility study to test photocatalytic coatings on roads, pavements, and public spaces in order to achieve noticeable improvements in air quality.
About Smog-Eating Technology
It is a photocatalytic technology based primarily on Titanium Dioxide (TiO₂).
This technology uses photocatalytic coatings typically Titanium Dioxide (TiO₂) based which is applied to surfaces such as roads, pavements, and buildings to neutralise air pollutants.
- Working mechanism
- Titanium Dioxide acts as a photocatalyst when exposed to sunlight or UV light.
- It converts harmful gases like nitrogen dioxide (NO₂) and volatile organic compounds (VOCs) into less harmful substances (e.g., nitrates, carbon dioxide, and water).
- The process mimics a “self-cleaning” effect, helping break down pollutants on contact.
- Benefits:
- This technology reduces harmful air pollutants such as nitrogen dioxide (NO₂) and hydrocarbons.
- It improves public health by lowering exposure to toxic air.
- It is a low-maintenance and passive technology that works continuously under sunlight.
- It can also be integrated into existing urban infrastructure without causing major disruption.
- Challenges:
- There is a need for scientific validation of its effectiveness under local conditions.
- The cost-effectiveness of large-scale application must be carefully assessed.
- There is question about the long-term durability of the coatings and the proper disposal of any residues they generate.
