The role of ultramicropores in the CO2 adsorption capacity of Fe–BTC crystallites synthesized with a perturbation-assisted nanofusion synthesis strategy,CrystEngComm

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The role of ultramicropores in the CO2 adsorption capacity of Fe–BTC crystallites synthesized with a perturbation-assisted nanofusion synthesis strategy
CrystEngComm ( IF 2.6 ) Pub Date : 2019/12/23 , DOI: 10.1039/c9ce01626k
Aysu Yurduşen _{1,

2,

3,

4,

5} , Alp Yürüm _{3,

4,

5,

6} , Yuda Yürüm _{1,

2,

3,

4,

5}

Affiliation

Herein, we report the highest BET surface area (1312 m² g⁻¹) and the highest total pore volume (1.41 cm³ g⁻¹) reported for Fe–BTC to date. More importantly, a CO₂ adsorption capacity of 27.5 wt% (6.24 mmol g⁻¹) is achieved at 8.5 bar and 298 K, which is the highest reported value for Fe–BTC to date. A perturbation-assisted nanofusion mechanism is used to synthesize Fe–BTCs, which form hierarchical pores. The synthesis parameters are optimized to enhance the amount of CO₂ adsorbed. The highest CO₂ adsorption capacity is achieved by Fe–BTC, which has ultramicropores (pore diameter <0.7 nm) in its pore structure. This measured CO₂ uptake capacity (1 bar and 298 K) is higher than those of the MOFs (MOF-177, UMCM-1, MIL-101(Cr), ZIF-8, and MOF-5) reported in the literature. Herein, we experimentally prove the significant contribution of ultramicropores and narrow micropores for the adsorbed CO₂ amount. In conclusion, this study i) reports a strategy that increases the BET surface area (1.6 times), total pore volume (3.1 times) and CO₂ adsorption capacity (1.66 times) and ii) shows the critical role of ultramicropores and the volume and distribution of narrow micropores on the adsorbed CO₂ amount. The reported synthesis strategy can lead the way for the synthesis of highly porous sorbents with an enhanced BET surface area, total pore volume and CO₂ sorption capacity, which should be further examined for other porous sorbents to achieve CO₂ sorption goals.

中文翻译：

超微孔在微扰辅助纳米融合合成策略下合成的Fe–BTC晶体的CO2吸附能力中的作用

在此，我们报道了迄今为止报道的Fe–BTC的最高BET表面积（1312 m ² g ^-1）和最高总孔体积（1.41 cm ³ g ^-1）。更重要的是，在8.5 bar和298 K下获得了27.5 wt％（6.24 mmol g ^-1）的CO ₂吸附容量，这是迄今为止Fe-BTC的最高报道值。扰动辅助的纳米融合机制被用于合成Fe-BTCs，这些Fe-BTCs形成了分层的孔。优化合成参数以提高吸附的CO ₂量。Fe-BTC具有最高的CO ₂吸附能力，其孔结构具有超微孔（孔径<0.7 nm）。此测量的CO₂吸收容量（1 bar和298 K）高于文献中报道的MOF（MOF-177，UMCM-1，MIL-101（Cr），ZIF-8和MOF-5）。在这里，我们实验证明了超微孔和窄微孔对CO₂吸附量的显着贡献。总而言之，这项研究（i）报告了增加BET表面积（1.6倍），总孔体积（3.1倍）和CO₂吸附容量（1.66倍）的策略，并且ii）显示了超微孔的关键作用以及体积和窄微孔在CO₂吸附量上的分布。报道的合成策略可为合成具有更高的BET表面积，总孔体积和CO₂的高孔隙度吸附剂铺平道路吸附能力，应进一步检查其他多孔吸附剂以实现CO ₂吸附目标。

更新日期：2020-02-13

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