Hierarchically mesostructured MIL-101 metal-organic frameworks: supramolecular template-directed synthesis and accelerated adsorption kinetics for dye removal

作者：Huang Xiao Xian; Qiu Ling Guang^*; Zhang Wang; Yuan Yu Peng; Jiang Xia; Xie An Jian; Shen Yu Hua; Zhu Jun Fa

来源：CrystEngComm, 2012, 14(5): 1613-1617.

DOI：10.1039/c1ce06138k

Hierarchically mesostructured MIL-101 metal-organic frameworks (MOFs) were successfully synthesized under solvothermal synthesis conditions by using the cationic surfactant cetyltrimethylammonium bromide as a supramolecular template. The mesostructured MIL-101 MOFs were characterized by powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and nitrogen adsorption-desorption isotherms at 77 K. The results suggest that the mesostructured MIL-101 MOFs obtained are composed of numerous MOF nanocrystals. Pore size distribution analyses of the as-synthesized MOF samples reveal that such mesostructured MIL-101 MOFs have well-defined trimodal pore size distributions showing simultaneous existence of meso-and macropore channel systems. Significantly, such hierarchically mesostructured MIL-101 exhibits remarkably accelerated adsorption kinetics for dye removal in comparison with the bulk MIL-101 crystals, which is due to unique hierarchically meso- nd macropores created in the solid.

• 出版日期2012
• 单位安徽大学; 中国科学技术大学