Bimetallic MOF-74 materials containing both Co and Ni were synthesized by solvothermal method.The structure,morphology and adsorption properties were characterized by XRD,SEM,N2 gas adsorption and ICP-AES.Meanwhile,the CO2 adsorption and CO2/N2 separation performances of the materials at room temperature and 0～100kPa were studied.The result showed that bimetallic MOF-74 materials retained the same crystal structure as the single metal MOF-74,but the morphology changed and the crystal size decreased.Results of CO2 adsorption test showed that the bimetallic material Ni25Co-MOF-74 exhibited the largest CO2 adsorption capacity of 4.77mmol/g,which was 13.30% higher than that of Co-MOF-74,and the ideal separation factor for CO2/N2 reached 25,which was 66.67% higher than that of Co-MOF-74.The CO2 adsorption capacity of Ni25Co-MOF-74 after four cycles remained 4.75mmol/g,therefore implying excellent regeneration performance.
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基金资助
中央高校基本科研业务费专项项目(DUT15ZD(G)03),(DUT16RC(3)103)
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