Chen Zhi, Wang Rui, Ma Tao, Wang Jin-Long, Duan Yu, Dai Zhi-Zhan, Xu Jie, Wang Hui-Juan, Yuan Jiayin, Jiang Hai-Long, Yin Yue-Wei, Li Xiao-Guang, Gao Min-Rui, Yu Shu-Hong
Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Institute of Energy, Hefei Comprehensive National Science Center, CAS Center for Excellence in Nanoscience, Institute of Biomimetic Materials & Chemistry, Anhui Engineering Laboratory of Biomimetic Materials, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China.
Shenzhen Key Laboratory for Functional Polymer, College of Chemistry and Environment Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, China.
Angew Chem Int Ed Engl. 2021 Jun 14;60(25):14124-14130. doi: 10.1002/anie.202104366. Epub 2021 May 14.
We report that continuous MOF films with highly controlled thickness (from 44 to 5100 nm) can be deposited over length scales greater than 80 centimeters by a facile, fast, and cost-effective spray-coating method. Such success relies on our discovery of unprecedented perfectly dispersed colloidal solutions consisting of amorphous MOF nanoparticles, which we adopted as precursors that readily converted to the crystalline films upon low-temperature in situ heating. The colloidal solutions allow for the fabrication of compact and uniform MOF films on a great deal of substrates such as fluorine-doped tin oxide, glass, SiO , Al O , Si, Cu, and even flexible polycarbonate, widening their technological applications where substrates are essential. Despite the present work focuses on the fabrication of uniform cobalt-(2-methylimidazole) and zinc-(2-methylimidazole) films, our findings mark a great possibility in producing other high-quality MOF thin films on a large scale.
我们报道，通过一种简便、快速且经济高效的喷涂方法，可以在长度超过80厘米的范围内沉积具有高度可控厚度（44至5100纳米）的连续金属有机框架（MOF）薄膜。这一成功依赖于我们发现了由无定形MOF纳米颗粒组成的前所未有的完美分散胶体溶液，我们将其用作前体，在低温原位加热时很容易转化为结晶薄膜。这些胶体溶液能够在大量基底上制备致密且均匀的MOF薄膜，如氟掺杂氧化锡、玻璃、SiO、AlO、Si、Cu，甚至是柔性聚碳酸酯，拓宽了它们在基底至关重要的技术应用领域。尽管目前的工作重点是制备均匀的钴 -（2 - 甲基咪唑）和锌 -（2 - 甲基咪唑）薄膜，但我们的发现表明大规模生产其他高质量MOF薄膜具有很大可能性。
