Aug-17-17
Researchers at Rice University have created a freeze-dried foam able to absorb carbon dioxide from the air.
The foam is made up of sheets of hexagonal-boron nitride (h-BN) that were freeze dried, which caused them puff up. The foam, which will dissolve in liquid at this stage, was then augmented with polyvinyl alcohol for strength. According to the team, the foam can absorb up to 340 percent of its weight in CO2. That gas can then be removed from the sponge, allowing the material to be repeatedly reused.
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