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Colyliform Crystalline 2D Covalent Organic Frameworks (COFs) with Quasi-3D Topologies for Rapid I2 Adsorption |
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| Authors: | Dr Xinghua Guo Dr Yang Li Dr Meicheng Zhang Dr Kecheng Cao Prof Yin Tian Dr Yue Qi Prof Shoujian Li Prof Kun Li Prof Xiaoqi Yu Prof Lijian Ma |
| Institution: | 1. College of Chemistry, Sichuan University, Key Laboratory of Radiation Physics & Technology, Ministry of Education, No. 29 Wangjiang Road, Chengdu, 610064 P. R. China
These authors contributed equally to this work.;2. Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026 P. R. China These authors contributed equally to this work.;3. College of Chemistry, Sichuan University, Key Laboratory of Radiation Physics & Technology, Ministry of Education, No. 29 Wangjiang Road, Chengdu, 610064 P. R. China;4. Electron Microscopy of Materials Science, Central Facility for Electron Microscopy, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany;5. School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137 P. R. China |
| Abstract: | Constructing three-dimensional (3D) structural characteristics on two-dimensional (2D) covalent organic frameworks (COFs) is a good approach to effectively improve the permeability and mass transfer rate of the materials and realize the rapid adsorption for guest molecules, while avoiding the high cost and monomer scarcity in preparing 3D COFs. Herein, we report for the first time a series of colyliform crystalline 2D COFs with quasi-three-dimensional (Q-3D) topologies, consisting of unique “stereoscopic” triangular pores, large interlayer spacings and flexible constitutional units which makes the pores elastic and self-adaptable for the guest transmission. The as-prepared QTD-COFs have a faster adsorption rate (2.51 g h−1) for iodine than traditional 2D COFs, with an unprecedented maximum adsorption capacity of 6.29 g g−1. The excellent adsorption performance, as well as the prominent irradiation stability allow the QTD-COFs to be applied for the rapid removal of radioactive iodine. |
| Keywords: | adsorption covalent organic frameworks (COFs) iodine mass transfer quasi-three-dimensional |