乙二胺改性金属有机骨架材料MIL-101(Cr)常压下吸附CO2

采用溶剂热法将乙二胺接枝到金属有机骨架材料MIL-101(Cr)上，用于常压下CO2的吸附，研究了乙二胺接枝量及温度对材料结构、形貌和CO2吸附性能的影响. 结果表明，乙二胺改性的MIL-101材料在常温常压下对CO2的吸附量可达2.43 mmol/g，比改性前提高14.6%，CO2/N2的吸附分离系数从11提高至17，比改性前提高55.6%. 改性后材料经80℃真空加热可完全脱附再生，具有很好的再生稳定性.

Adsorption of CO2 on Ethylenediamine Modified Metal-organic Framework Material MIL-101 (Cr) under Atmospheric Pressure

Eethylenediamine was grafted on metal-organic framework (MOF) material MIL-101(Cr) by solvothermal method, and the modified material used for adsorption of CO2 under atmospheric pressure. The effects of grafted amount of ethylenediamine and temperature on the structure morphology of the material and adsorption performance of CO2 were examined. The results showed that compared with unmodified MIL-101(Cr), the adsorption capacity of CO2 reached 2.43 mmol/g, gaining 14.6% increase after ethylenediamine modification at normal temperature and pressure. At the same time, the separation factor of CO2 with N2 by adsorption increased from 11 to 17, raising 55.6%. The modified material could be completely regenerated under the vacuum degree of 0.001 Pa at 80℃, indicating its good stability.