Delhi funds IIT Madras project on 'smog-eating' photocatalytic tech
The Delhi Government has recently announced funding for a groundbreaking project at the Indian Institute of Technology (IIT) Madras, focusing on ‘smog-eating’ photocatalytic coatings. This innovative project aims to combat air pollution in urban areas by utilizing Titanium Dioxide (TiO2) panels and road mixtures to decompose harmful pollutants such as Nitrogen Oxides (NOx) and Volatile Organic Compounds (VOCs) into harmless gases.
Project Overview
Led by Professor Somnath C Roy from IIT Madras, the project will initially conduct laboratory tests before advancing to field trials in various locations across Delhi. The specific areas for these trials are yet to be determined, but the goal is to assess the effectiveness of photocatalytic coatings in reducing pollutants like Nitrogen Dioxide (NO2) and VOCs, which are significant contributors to urban air pollution.
How ‘Smog-Eating’ Technology Works
Professor Roy elaborated on the functioning of the TiO2-based materials in addressing smog-related issues. The technology involves the installation of TiO2 nanomaterial-based panels on rooftops and under street lights. These panels interact with harmful pollutants, breaking them down into harmless gases such as Nitrogen, Oxygen, and Carbon Dioxide.
Component 1: Photocatalytic Panels
One of the primary components of the project involves the creation of TiO2 nanomaterial-based panels. These panels are designed to function similarly to solar panels. When Nitrogen Oxides (NOx) and VOCs come into contact with these panels, they are photocatalytically degraded into benign gases. Professor Roy stated:
“In smog, nitrogen oxides, NOx, which are one of the main components, along with volatile organic compounds (VOCs), contribute significantly to air pollution. We are going to use TiO2-based materials to degrade these pollutants photocatalytically.”
Component 2: TiO2-Infused Road Surfaces
The second component of the project focuses on integrating Titanium Dioxide into road surfaces. The research will investigate the optimal proportions of TiO2 mixed with tar to enhance the breakdown of NOx and VOCs when they come into contact with the road. Professor Roy explained:
“We will study how to mix titanium dioxide at certain proportions with tar for road construction, and check its effectiveness under various lighting conditions, including artificial light and sunlight.”
Laboratory Testing and Field Recommendations
Following the laboratory phase, the project aims to provide recommendations to the Delhi government regarding the most effective locations for pilot implementations of the technology. Professor Roy emphasized the importance of understanding the optimal concentration of TiO2 for breaking down NOx and VOCs:
“We are first going to study this under a laboratory environment to determine the optimal composition of TiO2 that effectively breaks down NOx and VOCs. Then, we will recommend specific sites for installation and implementation.”
Potential Impact on Air Quality
The implementation of this ‘smog-eating’ technology has the potential to significantly improve air quality in urban environments. By reducing the levels of harmful pollutants, the project could contribute to better public health outcomes and a more sustainable urban ecosystem. The use of photocatalytic coatings could also pave the way for innovative approaches to urban planning and infrastructure development.
Future Prospects
As the project progresses, it will be crucial to monitor the effectiveness of the technology in real-world conditions. The collaboration between IIT Madras and the Delhi Government represents a significant step towards addressing the pressing issue of air pollution in India. If successful, this initiative could serve as a model for similar projects in other cities facing air quality challenges.
Conclusion
The funding of the IIT Madras project on ‘smog-eating’ photocatalytic technology by the Delhi Government marks a proactive approach to tackling urban air pollution. With the potential to convert harmful pollutants into harmless gases, this innovative project could play a vital role in improving air quality and public health in densely populated areas.
Note: This article is based on information available as of October 2023 and aims to provide an overview of the IIT Madras project funded by the Delhi Government.
