Postsynthetically Modified Covalent Organic Frameworks for Efficient and Effective Mercury Removal
| Autor: | Hao Wei, Qi Sun, Nicholas Nguyen, Shengqian Ma, Lukasz Wojtas, Carter W. Abney, Lyndsey D. Earl, Briana Aguila, Yuchuan Cheng, Jason A. Perman |
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| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
Aqueous solution Chemistry chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Biochemistry Combinatorial chemistry Catalysis 0104 chemical sciences Mercury (element) chemistry.chemical_compound Colloid and Surface Chemistry Adsorption Thioether Covalent bond Thiol Organic chemistry Chelation 0210 nano-technology Mesoporous material |
| Zdroj: | Journal of the American Chemical Society. 139(7) |
| ISSN: | 1520-5126 |
| Popis: | A key challenge in environmental remediation is the design of adsorbents bearing an abundance of accessible chelating sites with high affinity, to achieve both rapid uptake and high capacity for the contaminants. Herein, we demonstrate how two-dimensional covalent organic frameworks (COFs) with well-defined mesopore structures display the right combination of properties to serve as a scaffold for decorating coordination sites to create ideal adsorbents. The proof-of-concept design is illustrated by modifying sulfur derivatives on a newly designed vinyl-functionalized mesoporous COF (COF-V) via thiol–ene “click” reaction. Representatively, the material (COF-S-SH) synthesized by treating COF-V with 1,2-ethanedithiol exhibits high efficiency in removing mercury from aqueous solutions and the air, affording Hg2+ and Hg0 capacities of 1350 and 863 mg g–1, respectively, surpassing all those of thiol and thioether functionalized materials reported thus far. More significantly, COF-S-SH demonstrates an ultrahigh ... |
| Databáze: | OpenAIRE |
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