“Smog Eating” Titanium Dioxide Surfaces

On 21st September 2025, the Delhi government announced that it is set to test titanium dioxide (TiO₂)-based “smog-eating” coatings on roads, pavements, and public spaces to reduce harmful pollutants such as nitrogen dioxide (NO₂) and hydrocarbons.

  • Field trials will be conducted in collaboration with a reputed scientific institution, with monthly progress reports and a final evaluation within six months.

How It Works

  • Photocatalytic Process: TiO₂ reacts with sunlight to break down air pollutants into less harmful compounds.
  • Durable Coating: Chemically stable and compatible with conventional construction materials, allowing long-term use.
  • Controlled Trials: Effectiveness, safety, and cost-efficiency will be rigorously measured under real-world conditions.

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