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Constructing Stable and Porous Covalent Organic Frameworks for Efficient Iodine Vapor Capture
Author(s) -
Zhai Lipeng,
Han Diandian,
Dong Jinhuan,
Jiang Wenqian,
Nie Riming,
Yang Xiubei,
Luo Xiaolong,
Li Zhongping
Publication year - 2021
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.202100032
Subject(s) - covalent organic framework , covalent bond , porosity , iodine , materials science , chemical stability , chemical engineering , polymer , porous medium , polymer chemistry , organic chemistry , chemistry , composite material , engineering
Covalent organic frameworks (COF) with periodic porous structures and tunable functionalities are a new class of crystalline polymers connected via strong covalent bonds. Constructing COF materials with high stability and porosity is attracting and essential for COFs’ further functional exploration. In this work, two new covalent organic frameworks (TTA‐TMTA‐COF and TTA‐FMTA‐COF) with high surface area, large pore volume, and excellent chemical stability toward harsh conditions are designed and synthesized by integrating the methoxy functional groups into the networks. Both two COFs are further employed for iodine removal since radioactive iodine in nuclear waste has seriously threatened the natural environment and human health. TTA‐TMTA‐COF and TTA‐FMTA‐COF can capture 3.21 and 5.07 g g −1 iodine, respectively. Notably, the iodine capture capacity for iodine of TTA‐FMTA‐COF does not show any decline after being recycled five times. These results demonstrate both COFs possess ultrahigh capacity and excellent recyclability.