| As new porous materials,metal organic frameworks(MOFs)with ultrahigh special area,tunable porous size and adjustable surface functionality are used as adsorbents for capturing CO2.Porous carbon materials with excellent waterproof and chemical stability are also used as gas adsorbents and carriers.The conventional method,hydro-thermal synthesis,involves large consumption of organic solvent.Herein,the MOF HKUST-1 is synthesized by vapor induced transformation method.Considering stability of porous carbon,porous carbon with adjustable porous size and nitrogen and oxygen dopant was prepared;Due to the poor waterproof of HKUST-1,the composite,HKUST-1@OMC,is synthesized to enhance the waterproof property.The highlights are listed below.1.HKUST-1 shows high surface area,large size,solvent recycling and high CO2 adsorption capacity.2.Porous carbon is synthesized by evaporation induced self-assembly using resol as the source of carbon,TNO as the source of nitrogen and oxygen.Pore size can be adjusted from 3.5nm to 6.5nm by changing the mass ratio of TNO to resol.3.When the mass ratio of resol to TNO is 4:1,the porous carbon with functional group containing nitrogen and oxygen in the surface shows pore size of 3.5 nm.In nitrogen flow with 15% CO2,the CO2 adsorption capacity reaches up to 2.01 mmol/g at 298 K and atmospheric pressure.The CO2 adsorption capacity also reaches up to 0.94 mmol/g at 423 K.Porous carbon could desorb CO2 at low temperature.4.Ordered mesoporous carbon is used as substrate to prepare composite by directly physical dispersion of HKUST-1 precursor in the porous channel.Crystallization of HKUST-1 precursor occurs in the vapor of ethanol and water.The results show that the composite exhibits enhanced waterproof performance.5.The dynamic gas separation measurement of the composite HKUST-1@OMC illustrates that CO2 can be easily separated from N2 at atmospheric pressure and 298 K.The CO2 capture capacity is 1.04 mmol/g.It is about as twice as CO2 capture capacity of OMC. |
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