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Facile microwave-assisted solvothermal synthesis of rod-like aluminum terephthalate [MIL-53(Al)] for CO2 adsorption
Journal of Industrial and Engineering Chemistry ( IF 5.9 ) Pub Date : 2022-05-17 , DOI: 10.1016/j.jiec.2022.05.021
Liwei Sun , Meilin Yin , Zhen Li , Shaokun Tang

To alleviate environment issues derived from CO2 emission, developing effective and economical methods for CO2 capture has attracted much attention for decades. Metal-organic frameworks possess high porosity and stability, which is favorable to the adsorption of small molecules. Herein, an aluminum-based MOF, aluminum terephthalate [MIL-53(Al)], was synthesized with H2O and N,N′-dimethylformamide as co-solvent via microwave-assisted method for CO2 adsorption. The parameters including pre-mixing mode, microwave temperature, microwave power and reaction time were varied to study their influences on crystal structure, morphology and CO2 adsorption capacity of MW-MIL-53(Al). Wherein, MW-MIL-53(Al) prepared with pre-mixing mode of stirring at 130 °C, 200 W and 3 h presents high crystallinity and rod-like morphology. The synthesized MW-MIL-53(Al) possesses relatively high BET surface area (961 m2/g), pore volume (0.46 cm3/g) and thermal stability (up to 480 °C), and its CO2 adsorption capacity is 2.16 mmol CO2/g adsorbent under 25 °C and 0.1 MPa, which is higher than CS-MIL-53(Al) synthesized via conventional solvothermal method at 130 °C for 48 h.



中文翻译:

用于 CO2 吸附的棒状对苯二甲酸铝 [MIL-53(Al)] 的简便微波辅助溶剂热合成

为了缓解CO 2排放带来的环境问题,开发有效且经济的CO 2捕集方法几十年来一直备受关注。金属有机骨架具有高孔隙率和稳定性,有利于小分子的吸附。在此,以 H 2 O 和N , N'-二甲基甲酰胺为共溶剂,通过微波辅助吸附CO 2的方法合成了一种铝基 MOF,即对苯二甲酸铝 [MIL-53(Al)] 。改变预混合方式、微波温度、微波功率和反应时间等参数,研究它们对晶体结构、形貌和CO 2的影响MW-MIL-53(Al)的吸附能力。其中,MW-MIL-53(Al)采用130 ℃、200 W、3 h的预混方式制备,具有较高的结晶度和棒状形态。合成的MW-MIL-53(Al)具有较高的BET比表面积(961 m 2 /g)、孔容(0.46 cm 3 /g)和热稳定性(最高480 ℃)以及CO 2吸附能力在25 ℃和0.1 MPa下吸附剂的吸附量为2.16 mmol CO 2 /g,高于常规溶剂热法在130 ℃下48 h合成的CS-MIL-53(Al)。

更新日期:2022-05-17
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