Initially, in the synthesis of Cu–BTC MOFs some fraction of Cu was expected to be replaced with Mg to enhance its CO₂ adsorption properties. Indeed, an enhancement in the specific surface area, microporosity and CO₂ 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 CO₂ adsorption of 9.33 mmol g⁻¹ at 0 °C and 1 bar.

中文翻译：

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金属配体比对 Cu-BTC 金属-有机框架 CO2 吸附性能的影响†

最初，在 Cu-BTC MOFs 的合成中，预计部分 Cu 会被 Mg 取代，以增强其 CO ₂吸附性能。事实上，观察到比表面积、微孔率和CO ₂吸附能力的提高；然而，未检测到Mg。因此，在没有 Mg 的情况下，进行了具有相同 Cu 与 BTC 比率的 Cu-BTC MOF 的额外合成，以解释观察到的增强。结果发现，将Cu-BTC比率调整为1.09:1.0，这与文献报道的不同，导致Cu-BTC MOF具有更高的BET比表面积、更大的微孔体积，因此具有更好的CO ₂在 0 °C 和 1 bar 下吸附 9.33 mmol g ^{-1 。}