Li Si-Cheng, Hu Bi-Cheng, Shang Li-Mei, Ma Tao, Li Chao, Liang Hai-Wei, Yu Shu-Hong
Department of Chemistry, Institute of Biomimetic Materials and Chemistry, Anhui Engineering Laboratory of Biomimetic Materials, Division of Nanomaterials and Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, 230026, China.
Adv Mater. 2022 Jul;34(29):e2202504. doi: 10.1002/adma.202202504. Epub 2022 Jun 12.
By virtue of their extraordinarily high surface areas, ordered pore structures, various compositions, and rich functionality, metal-organic frameworks (MOFs) are of great interest in diverse fields such as gas separation, sensing, catalysis, energy, environment science, and biomedicine. However, the difficulty in processing MOF crystals and controlling the MOF superstructure is emerging as a critical issue in their application. Herein, it is reported that a robust template, i.e., nanofibrillated cellulose (NFC), can be used for the synthesis of MOF materials with 1D nanofiber morphology. NFC@MOF core-shell nanofibers with a uniform network structure and high aspect ratios can be prepared by use of this template. The small crystal size, flexibility, and good dispersity of the NFC@MOF nanofibers make it convenient for the macroscale assembly and solution processing of MOF materials. A proof-of-concept study is demonstrated wherein freestanding MOF nanofiber membranes represent good performance in applications of water treatment and heterogeneous catalysis reaction. This general synthesis and solution-processing strategy may herald a new era in promoting the industrial application of MOFs.
由于其超高的比表面积、有序的孔结构、多样的组成以及丰富的功能，金属有机框架材料（MOF）在气体分离、传感、催化、能源、环境科学和生物医学等多个领域引起了极大的关注。然而，MOF晶体的加工困难以及MOF超结构的控制问题正成为其应用中的一个关键问题。在此，有报道称一种强大的模板，即纳米纤维化纤维素（NFC），可用于合成具有一维纳米纤维形态的MOF材料。利用该模板可制备具有均匀网络结构和高长径比的NFC@MOF核壳纳米纤维。NFC@MOF纳米纤维的小晶体尺寸、柔韧性和良好的分散性使得MOF材料的宏观组装和溶液加工变得方便。一项概念验证研究表明，独立的MOF纳米纤维膜在水处理和多相催化反应应用中表现出良好的性能。这种通用的合成和溶液加工策略可能预示着促进MOF工业应用的新时代的到来。
