| 초록 |
Highly enhanced CO2 and H2 adsorption properties, and a selective adsorption of CO2 over N2 were achieved from a series of different phenolic resin-based carbon spheres (resorcinol-formaldehyde carbon (RFC) and phenol-formaldehyde carbon (PFC)), and melanin carbon spheres, respectively. RFC, PFC, and MC were produced by carbonization of RF and PF polymer (RFP and PFP), and melanin polymer (MP) spheres synthesized sol-gel reaction method and subsequent activations with hot CO2 and NH3 gas treatments. A series of CO2-activated and N-doped RFC and PFC spheres show almost perfect correlation between CO2 adsorption capacities and fine micropores. Moreover, prolonged activation processes for RFC and PFC spheres showing an ultra-high surface area with the highly H2 uptake capacity. In addition, melanin carbon (MC) spheres represent highly selective adsorption capacities for CO2 over N2, probably due to the increased chemisorption effect from the hetero-atom doped MC spheres. |
