Hierarchical porous materials based on nanoscale metal-organic frameworks dominated with permanent interparticle porosity

• Published in: Microporous and mesoporous materials Vol. 204; pp. 25 - 33
• Main Authors: Liu, Xun, Shen, Zhen-Qi, Xiong, Hui-Hui, Chen, Yan, Wang, Xiao-Nan, Li, Hao-Qiu, Li, Yan-Tao, Cui, Ke-Hui, Tian, Yun-Qi
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.03.2015
• Subjects: Hierarchical porous material; Interparticle porosity; Mesopore; Metal-organic framework; Nano-scale particle; Metal-organic framework; Mesopore; Interparticle porosity; Hierarchical porous material; Nano-scale particle
• ISSN: 1387-1811; 1873-3093
• DOI: 10.1016/j.micromeso.2014.11.005

[Display omitted] •We develop a general strategy for construction of mesoporous MOFs (mesoMOFs).•The mesoMOFs show hierarchical porosity with the interparticle mesopores.•The permanent interparticle mesopores are based on the sufficiently small NMOFs.•The mesopores are size-tunable and cover almost the all mesoscopic regime.•The large mesopores can be used for immobilization of the biological molecules. In order to extensively synthesize mesoporous metal-organic frameworks (mesoMOFs), we developed a strategy to construct permanent interparticle porosity based on nanoscale metal-organic frameworks (NMOFs). Using the strategy, we have attained a series of interparticle porosity dominated mesoMOFs (IPD-mesoMOFs) from six MOF-types with MIl-100, MIL-53, HKUST-1, DUT-5, DUT-4 and MIL-101(Cr) (termed as IPD-mesoMOF-1, -2, -3, -4, -5 and -6) structure, respectively. All members of this series are not only comparable to inorganic mesoporous materials to have the tunable mesopore apertures varying from a few nanometers to over a dozen nanometers, but also superior to the inorganic counterparts to remain hierarchical porosity with higher surface area (up to 2130m2g−1), larger mesopore volume (the highest to 2.59cm3g−1) and optional micro-porosity of diverse crystalline structures. The large mesopore apertures and rich carboxyl residues on the mesopore-walls also allow the IPD-mesoMOF series to accommodate large organic and inorganic molecules, especially to immobilize the bulky natural protein, such as, hemoglobin.