金属-有机骨架材料MOF-74系列捕集低浓度CO2的研究

Investigation to the Capture of Low Concentration CO_2 With MOF-74 Series of Metal-Organic Frameworks

采用溶剂热法合成M-MOF-74系列材料(M=Cu,Zn,Co,Mn,Mg,Cd等),探究Mg-MOF-74在不同温度下对CO_2的吸附效果,及不同金属离子合成的MOF-74材料对CO_2吸附能力的差异。结果表明:Mg-MOF-74的吸附效果随着温度的升高而下降,说明其对CO_2的吸附属于物理吸附,低温有利于CO_2的吸附。由于MOF-74的纳米孔道表面有着裸露的金属吸附位点存在,它对低浓度的CO_2有着较为理想的吸附量。在该系列材料中,Cu-MOF-74的吸附效果最差。Mg-MOF-74的吸附效果最佳,吸附性能远优于其他材料。

Using solvothermal method to synthesize materials of the M-MOF-74 series（ M = Cu,Zn,Co,Mn,Mg,Cd,etc）,and exploring the adsorption effect to CO2 of Mg-MOF-74 in different temperature,and the differences of adsorption capacity to CO2 for MOF-74 materials synthesized of different metal ions. The conclusion told that,the adsorption capacity of Mg-MOF-74 reduced with the rising of temperature,illustrating that its adsorption to CO2 belonged to physical adsorption,and low temperature was beneficial to the adsorption to CO2. Due to the existence of a high density of exposed M2 ＋adsorption sitese on the surface of nano-channels of the MOF-74,it had ideal adsorption capacity to low concentration CO2. Between this series of materials,the Cu-MOF-74＇s adsorption capacity was the worst. The Mg-MOF-74 ＇s was the best,and the adsorption performance was much better than other materials.