Scientists at the Indian Institute of Technology (IIT) Guwahati developed a novel photocatalytic material that uses sunlight to convert carbon dioxide (CO₂) emissions into methanol fuel. The innovation addresses two pressing challenges at once—reducing greenhouse gas emissions and meeting rising energy demand driven by continued reliance on fossil fuels. Details of the research have been published in the Journal of Materials Science.
Targeting Emissions Through Clean Fuel Conversion
Mahuya De, Professor in the Department of Chemical Engineering at IIT Guwahati, highlighted the environmental burden of petroleum-based fuels. She noted that persistent dependence on fossil fuels continues to accelerate CO₂ emissions and global warming. Consequently, the research team focused on designing photocatalytic systems that can convert carbon dioxide into cleaner fuels using renewable solar energy.
Graphitic Carbon Nitride at the Core
At the heart of the innovation is graphitic carbon nitride, a non-toxic, metal-free, and cost-effective material. The researchers selected this compound for its stability and suitability for large-scale applications, making it a promising candidate for practical emission reduction technologies in industrial environments.
Overcoming Limitations of Earlier Systems
Earlier photocatalytic approaches have struggled with rapid energy loss and low conversion efficiency, limiting their real-world usefulness. To overcome these challenges, the IIT Guwahati team integrated graphitic carbon nitride with few-layer graphene. Thanks to its high electrical conductivity and excellent charge transfer capability, graphene helped the catalyst retain energy more effectively during the reaction process.
Enhanced Performance Under Sunlight
During testing, the composite catalyst—particularly the formulation containing 15 percent graphene by weight—demonstrated superior charge separation and higher energy retention under sunlight. As a result, the system converted CO₂ into methanol with significantly improved efficiency. Moreover, the catalyst maintained stable performance over extended periods, indicating strong potential for continuous operation and industrial-scale deployment.
Applications Across Carbon-Intensive Industries
According to De, the technology could be deployed across several carbon-intensive sectors, including thermal power plants, cement manufacturing units, steel production facilities, and petrochemical refineries. By converting emissions into usable fuel, the process supports the shift toward a circular carbon economy and a cleaner energy future.
Next Steps Toward Scale-Up
As reported by indiatoday.in, the research team plans to scale up the process and develop a robust system capable of continuously converting CO₂ emissions into methanol using sunlight. De emphasised that the work contributes to both environmental mitigation and green energy generation, adding that solar-driven CO₂-to-fuel conversion represents a promising pathway toward sustainable industrial development.
