利用氧化铜室温下水蒸气辅助老化法合成MOF-505

Synthesis of MOF-505 by using copper oxide at room temperature under water vapor-assisted aging

摘要:

以氧化铜与3,3',5,5'-联苯四甲酸为反应原料，室温下分别以水、乙醇和N,N-二甲基甲酰胺(DMF)为溶剂，利用预盐湿磨法制得金属有机框架-505（MOF-505），再在不同的蒸汽（水、甲醇、DMF）中熏蒸辅助老化（VAG），制得VAG-MOF-505。结果显示，常温下乙醇预盐湿磨后配合水蒸气熏蒸20 h即可得到高结晶度的VAG -MOF-505。利用PXRD、FTIR、TGA、SEM、BET对其进行结构表征与孔结构分析。SEM与PXRD结果显示,VAG-MOF-505具有与溶剂热法合成产品相似的结晶度。VAG-MOF-505的BET比表面积达到1281 m2/g，平均孔径为0.66 nm。该文为VAG法在MOFs的绿色大规模合成方面的应用提供了新的研究思路。

Abstract:

Copper oxide and 3,3 ', 5,5'-biphenyltetracarboxylic acid are used as raw materials to obtain a MOF efficiently. At room temperature, we used water, ethanol and N, N-dimethylformamide (DMF) as liquid or vapors, respectively. The metal-organic framework-505 (MOF-505) was prepared by pre-ion and -liquid assisted grinding, then the Vapor-assisted aging (VAG) was carried out in different solvent vapor (water, methanol, DMF) to obtain the VAG-MOF-505. The results showed that VAG-MOF-505 with high crystallinity was obtained through pre-ion and -liquid assisted grinding with adding ethanol liquid (100 μL), then aged in ethanol vapor for 20 h at room temperature. By means of PXRD, FTIR, TGA, SEM, BET, structural characterization and pore analyses of the obtained product were performed. Its SEM and PXRD results showed that VAG-MOF-505 had high crystallinity similar to that made from the solvothermal method. Moreover, VAG-MOF-505 has a BET specific surface area of 1281 m2/g and an average pore diameter of 0.66 nm. This research result provides a new potential application of VAG method in green large-scale synthesis of MOFs.