金属配体比例对Cu-BTC金属有机框架材料CO吸附性能的影响。
Effect of metal-ligand ratio on the CO adsorption properties of Cu-BTC metal-organic frameworks.
作者信息
Liu Yuanyuan, Liu Suqin, Gonçalves Alexandre A S, Jaroniec Mietek
机构信息
Department of Chemistry and Biochemistry, Kent State University Kent Ohio 44240 USA
School of Food Science and Technology & School of Chemical Engineering, Hubei University of Arts and Science Xiangyang 441053 China.
出版信息
RSC Adv. 2018 Oct 17;8(62):35551-35556. doi: 10.1039/c8ra07774f. eCollection 2018 Oct 15.
Initially, in the synthesis of Cu-BTC MOFs some fraction of Cu was expected to be replaced with Mg to enhance its CO adsorption properties. Indeed, an enhancement in the specific surface area, microporosity and CO adsorption capacity was observed; however, Mg was not detected. Therefore, additional syntheses of Cu-BTC MOFs with the same Cu to BTC ratios were performed but in the absence of Mg to explain the observed enhancement. It was found that the adjustment of the Cu-BTC ratio to 1.09 : 1.0, which differs from that reported in the literature, resulted in a Cu-BTC MOF with higher specific BET surface area, larger micropore volume, and consequently, superior CO adsorption of 9.33 mmol g at 0 °C and 1 bar.
最初，在合成铜-对苯二甲酸金属有机框架（Cu-BTC MOFs）时，预计会有一部分铜被镁取代，以增强其对一氧化碳的吸附性能。事实上，观察到比表面积、微孔率和一氧化碳吸附容量有所提高；然而，未检测到镁。因此，进行了额外的具有相同铜与对苯二甲酸比例的铜-对苯二甲酸金属有机框架的合成，但不含镁，以解释观察到的增强现象。结果发现，将铜与对苯二甲酸的比例调整为1.09∶1.0（这与文献报道的不同），得到了一种具有更高的比表面积、更大的微孔体积的铜-对苯二甲酸金属有机框架，因此，在0℃和1巴下对一氧化碳的吸附性能优异，为9.33毫摩尔/克。
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