期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 60, 期 11, 页码 6055-6060出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202015629
关键词
covalent organic frameworks (COFs); ozone detection; ozone removal; smart materials
资金
- National Natural Science Foundation of China [21971126, 22001131]
- Postdoctoral Science Foundation of China [2019M660974]
- 111 Project [B12015]
In this study, imine-based COFs were developed for efficient and rapid sensing and removal of ozone. These materials work under broad working conditions and can effectively reduce ozone concentration below the recommended safety limit. The mechanism behind the performance of imine-based COFs was thoroughly investigated, offering a new type of advanced material for ozone sensing and removal with broad application scope.
Traditional ozone sensing and removal materials still suffer from high energy consumption and low efficiency. Thus, seeking new ozone-responsive materials with high efficiency and broad working conditions is of great significance. Herein, we first developed covalent organic frameworks (COFs) for smart sensing and efficient removal of ozone. Notably, imine-based COFs possess dramatically fast optical responses (<1 s) to ozone as low as 0.1 ppm under broad working conditions (e.g., in the presence or absence of moisture, room temperature). Moreover, we found that imine-based COFs can also be applied as excellent ozone removers that can efficiently reduce the ozone concentration below the recommended safety limit (<0.1 ppm) for humans. The mechanism for the performance of imine-based COFs was unveiled in-depth by various characterization techniques and analyses. This study not only provides a new type of advanced materials for ozone sensing and removal but also broadens the application scope of COFs.
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