🏭 New low-cost materials capture CO₂

To limit greenhouse gas emissions, one promising method is to trap CO₂ before it reaches the air. But current processes are too expensive, mainly because of the heat required to release the captured carbon dioxide. New materials could change the game by working at much lower temperatures.

Carbonaceous solids, such as activated carbon fibers, offer an interesting alternative. Their large surface area allows them to capture CO₂, and the presence of nitrogen groups makes it easier to release with less energy.


A team from Chiba University, led by Professor Yasuhiro Yamada, has developed a new family of materials called "viciazites." Their unique feature? The nitrogen groups are arranged in a controlled manner, side by side, rather than randomly. This breakthrough, published in the journal Carbon, relies on a multi-step synthesis method.

Tests showed clear differences. The materials captured more CO₂ than untreated carbon fibers. Most notably, CO₂ release occurs at temperatures below 140 °F (60 °C) for certain configurations, paving the way for recovery using waste heat from industries, thus reducing costs.

Another configuration, involving pyrrolic groups, requires more heat to release CO₂, but its greater chemical stability could make it more durable over time. Each configuration thus has its advantages depending on the intended use.

This work provides a clear roadmap for designing next-generation carbon capture materials that are both efficient and economical.