Smog-Eating Technology

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.