Nitrogen-containing activated carbon fibers derived from silk fibers for CO 2 capture

Nitrogen-containing activated carbon fibers (N-ACFs) with ultra-high specific surface area and abundance micropores are synthesized from natural silk fibers. The N-ACFs exhibited the CO2 uptake of 7.0mmol/g and 4.8mmol/g at 0°C and 25°C, 101kPa. These outstanding features as a CO2 solid adsorbent were mostly attributed to the materials׳ physical properties (microporosity) in addition to its high content of basic nitrogen species.