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Effect of metal–ligand ratio on the CO2 adsorption properties of Cu–BTC metal–organic frameworks

机译:金属配体比对Cu-BTC金属-有机骨架对CO2吸附性能的影响

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Initially, in the synthesis of Cu–BTC MOFs some fraction of Cu was expected to be replaced with Mg to enhance its CO _(2) adsorption properties. Indeed, an enhancement in the specific surface area, microporosity and CO _(2) 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 _(2) adsorption of 9.33 mmol g ~(?1) at 0 °C and 1 bar.
机译:最初,在合成Cu–BTC MOF时,预期部分Cu被Mg代替,以增强其CO _(2)吸附性能。实际上,观察到了比表面积,微孔率和CO _(2)吸附能力的提高。但是,未检测到Mg。因此,用相同的铜对BTC比率进行了Cu-BTC MOF的其他合成,但是没有镁来解释观察到的增强。发现将Cu-BTC比值调整为1.09?:?1.0与文献中报道的方法不同,导致了Cu-BTC MOF具有更高的比表面积,更大的微孔体积,因此具有更好的比表面积。在0°C和1 bar下,CO_(2)吸附9.33 mmol g〜(?1)。

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