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Charge-Enhanced Separation of Organic Pollutants in Water by Anionic Covalent Organic Frameworks
[Image: see text] The effective removal of organic pollutants in wastewater is a key environmental challenge. In this work, an anionic covalent organic framework (named TpPa-SO(3)Na) was synthesized through a green two-in-one synthesis strategy with autocatalytic imine formation. The slowly generate...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2020
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7745399/ https://www.ncbi.nlm.nih.gov/pubmed/33344854 http://dx.doi.org/10.1021/acsomega.0c04904 |
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author | Jiang, Wei Peng, Dong Cui, Wei-Rong Liang, Ru-Ping Qiu, Jian-Ding |
author_facet | Jiang, Wei Peng, Dong Cui, Wei-Rong Liang, Ru-Ping Qiu, Jian-Ding |
author_sort | Jiang, Wei |
collection | PubMed |
description | [Image: see text] The effective removal of organic pollutants in wastewater is a key environmental challenge. In this work, an anionic covalent organic framework (named TpPa-SO(3)Na) was synthesized through a green two-in-one synthesis strategy with autocatalytic imine formation. The slowly generated acetic acid as a catalyst is favorable to sustain the reversibility of the covalent organic framework (COF) formation reaction and improve the crystallinity of TpPa-SO(3)Na. TpPa-SO(3)Na consists of a homogeneous distribution of sulfonate groups to produce negatively charged regular channels. The strong electrostatic and hydrogen-bonding interactions between the sulfonate groups anchored in the nanochannels and the amine groups in organic pollutants improve the adsorption selectivity and capacity. These structures allow a high degree of control over adsorption processes to boost the adsorption kinetics and improve selective separation. TpPa-SO(3)Na exhibits ultrafast adsorption (<1 min) of cationic antibiotics and dyes (average over 95%). Furthermore, TpPa-SO(3)Na exhibits high selectivity for the uptake of dye molecules on the basis of the differences in charge and molecular size. This work explored functional designs and green manufacturing of anionic COFs for removal of hydrophilic organic pollutants. |
format | Online Article Text |
id | pubmed-7745399 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-77453992020-12-18 Charge-Enhanced Separation of Organic Pollutants in Water by Anionic Covalent Organic Frameworks Jiang, Wei Peng, Dong Cui, Wei-Rong Liang, Ru-Ping Qiu, Jian-Ding ACS Omega [Image: see text] The effective removal of organic pollutants in wastewater is a key environmental challenge. In this work, an anionic covalent organic framework (named TpPa-SO(3)Na) was synthesized through a green two-in-one synthesis strategy with autocatalytic imine formation. The slowly generated acetic acid as a catalyst is favorable to sustain the reversibility of the covalent organic framework (COF) formation reaction and improve the crystallinity of TpPa-SO(3)Na. TpPa-SO(3)Na consists of a homogeneous distribution of sulfonate groups to produce negatively charged regular channels. The strong electrostatic and hydrogen-bonding interactions between the sulfonate groups anchored in the nanochannels and the amine groups in organic pollutants improve the adsorption selectivity and capacity. These structures allow a high degree of control over adsorption processes to boost the adsorption kinetics and improve selective separation. TpPa-SO(3)Na exhibits ultrafast adsorption (<1 min) of cationic antibiotics and dyes (average over 95%). Furthermore, TpPa-SO(3)Na exhibits high selectivity for the uptake of dye molecules on the basis of the differences in charge and molecular size. This work explored functional designs and green manufacturing of anionic COFs for removal of hydrophilic organic pollutants. American Chemical Society 2020-12-02 /pmc/articles/PMC7745399/ /pubmed/33344854 http://dx.doi.org/10.1021/acsomega.0c04904 Text en © 2020 American Chemical Society This is an open access article published under a Creative Commons Non-Commercial No Derivative Works (CC-BY-NC-ND) Attribution License (http://pubs.acs.org/page/policy/authorchoice_ccbyncnd_termsofuse.html) , which permits copying and redistribution of the article, and creation of adaptations, all for non-commercial purposes. |
spellingShingle | Jiang, Wei Peng, Dong Cui, Wei-Rong Liang, Ru-Ping Qiu, Jian-Ding Charge-Enhanced Separation of Organic Pollutants in Water by Anionic Covalent Organic Frameworks |
title | Charge-Enhanced Separation of Organic Pollutants in
Water by Anionic Covalent Organic Frameworks |
title_full | Charge-Enhanced Separation of Organic Pollutants in
Water by Anionic Covalent Organic Frameworks |
title_fullStr | Charge-Enhanced Separation of Organic Pollutants in
Water by Anionic Covalent Organic Frameworks |
title_full_unstemmed | Charge-Enhanced Separation of Organic Pollutants in
Water by Anionic Covalent Organic Frameworks |
title_short | Charge-Enhanced Separation of Organic Pollutants in
Water by Anionic Covalent Organic Frameworks |
title_sort | charge-enhanced separation of organic pollutants in
water by anionic covalent organic frameworks |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7745399/ https://www.ncbi.nlm.nih.gov/pubmed/33344854 http://dx.doi.org/10.1021/acsomega.0c04904 |
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