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Side-chain modified covalent organic frameworks for enhanced visible light photocatalytic degradation of bisphenol A and application in seawater.

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Title: Side-chain modified covalent organic frameworks for enhanced visible light photocatalytic degradation of bisphenol A and application in seawater.
Authors: Liu, Tianshuo1 (AUTHOR), Sun, Jing1 (AUTHOR) sunjing77@qlu.edu.cn, Xie, Meng1 (AUTHOR) 1094440970@qq.com, Zhao, Ru-Song1,2 (AUTHOR) zhaors1976@126.com
Source: Chemical Engineering Journal. Feb2026, Vol. 530, pN.PAG-N.PAG. 1p.
Subjects: Photocatalysis, Bisphenol A, Environmental remediation, Electron transport, Porous materials, Marine pollution, Wastewater treatment
Abstract: Covalent organic frameworks (COFs), as emerging non-metallic photocatalysts, hold great promise for organic wastewater treatment. However, their photocatalytic efficiency is often hindered by unfavorable electron-hole recombination and slow carrier transport, particularly in high-salinity wastewater. To address these challenges, this study proposes side-chain modification of COFs with electron-withdrawing substituents (–NO 2 > –CN). Three R-COFs (R = H, CN, NO 2) were synthesized from 2,4,6-triformylphloroglucinol (Tp) and R-BD monomers via solvothermal condensation. Photoelectrochemical studies and density functional theory (DFT) calculations showed that CN-COF, containing a moderately electron-withdrawing –CN group, significantly enhanced charge migration and suppressed recombination. Therefore, CN-COF exhibited outstanding photocatalytic activity for bisphenol A (BPA), a representative emerging contaminant (EC), with a rate constant (K) of 0.94 min−1, far exceeding those of NO 2 -COF (K = 0.13 min−1) and H-COF (K = 0.05 min−1). CN-COF also displayed excellent stability and adaptability across diverse water matrices, with strong resistance to ionic interference, particularly in seawater. Practical evaluations with natural water samples and scaled-up sunlight-driven experiments confirmed its high environmental applicability for the remediation of EC-contaminated wastewater. This study provides a feasible strategy for enhancing COF photocatalysts through electron-withdrawing substituents and offers theoretical guidance for targeted seawater pollutant degradation. [Display omitted] • •O₂− and 1O₂ are the primary reactive species in the R-COF/Vis system. • Achieves nearly 100% degradation efficiency of BPA without sacrificing reagents • Efficient seawater pollutant removal by ion-tolerant CN-COF photocatalysis • Theory and experiment identified easily degradable ECs for targeted degradation. [ABSTRACT FROM AUTHOR]
Copyright of Chemical Engineering Journal is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 192194314
AccessLevel: 6
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PubTypeId: academicJournal
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  Label: Title
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  Data: Side-chain modified covalent organic frameworks for enhanced visible light photocatalytic degradation of bisphenol A and application in seawater.
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  Data: <searchLink fieldCode="AR" term="%22Liu%2C+Tianshuo%22">Liu, Tianshuo</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sun%2C+Jing%22">Sun, Jing</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> sunjing77@qlu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Xie%2C+Meng%22">Xie, Meng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> 1094440970@qq.com</i><br /><searchLink fieldCode="AR" term="%22Zhao%2C+Ru-Song%22">Zhao, Ru-Song</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> zhaors1976@126.com</i>
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  Data: <searchLink fieldCode="JN" term="%22Chemical+Engineering+Journal%22">Chemical Engineering Journal</searchLink>. Feb2026, Vol. 530, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Photocatalysis%22">Photocatalysis</searchLink><br /><searchLink fieldCode="DE" term="%22Bisphenol+A%22">Bisphenol A</searchLink><br /><searchLink fieldCode="DE" term="%22Environmental+remediation%22">Environmental remediation</searchLink><br /><searchLink fieldCode="DE" term="%22Electron+transport%22">Electron transport</searchLink><br /><searchLink fieldCode="DE" term="%22Porous+materials%22">Porous materials</searchLink><br /><searchLink fieldCode="DE" term="%22Marine+pollution%22">Marine pollution</searchLink><br /><searchLink fieldCode="DE" term="%22Wastewater+treatment%22">Wastewater treatment</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Covalent organic frameworks (COFs), as emerging non-metallic photocatalysts, hold great promise for organic wastewater treatment. However, their photocatalytic efficiency is often hindered by unfavorable electron-hole recombination and slow carrier transport, particularly in high-salinity wastewater. To address these challenges, this study proposes side-chain modification of COFs with electron-withdrawing substituents (–NO 2 > –CN). Three R-COFs (R = H, CN, NO 2) were synthesized from 2,4,6-triformylphloroglucinol (Tp) and R-BD monomers via solvothermal condensation. Photoelectrochemical studies and density functional theory (DFT) calculations showed that CN-COF, containing a moderately electron-withdrawing –CN group, significantly enhanced charge migration and suppressed recombination. Therefore, CN-COF exhibited outstanding photocatalytic activity for bisphenol A (BPA), a representative emerging contaminant (EC), with a rate constant (K) of 0.94 min−1, far exceeding those of NO 2 -COF (K = 0.13 min−1) and H-COF (K = 0.05 min−1). CN-COF also displayed excellent stability and adaptability across diverse water matrices, with strong resistance to ionic interference, particularly in seawater. Practical evaluations with natural water samples and scaled-up sunlight-driven experiments confirmed its high environmental applicability for the remediation of EC-contaminated wastewater. This study provides a feasible strategy for enhancing COF photocatalysts through electron-withdrawing substituents and offers theoretical guidance for targeted seawater pollutant degradation. [Display omitted] • •O₂− and 1O₂ are the primary reactive species in the R-COF/Vis system. • Achieves nearly 100% degradation efficiency of BPA without sacrificing reagents • Efficient seawater pollutant removal by ion-tolerant CN-COF photocatalysis • Theory and experiment identified easily degradable ECs for targeted degradation. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Chemical Engineering Journal is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.cej.2026.173500
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      – Code: eng
        Text: English
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        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Photocatalysis
        Type: general
      – SubjectFull: Bisphenol A
        Type: general
      – SubjectFull: Environmental remediation
        Type: general
      – SubjectFull: Electron transport
        Type: general
      – SubjectFull: Porous materials
        Type: general
      – SubjectFull: Marine pollution
        Type: general
      – SubjectFull: Wastewater treatment
        Type: general
    Titles:
      – TitleFull: Side-chain modified covalent organic frameworks for enhanced visible light photocatalytic degradation of bisphenol A and application in seawater.
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          Name:
            NameFull: Liu, Tianshuo
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            NameFull: Sun, Jing
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            NameFull: Xie, Meng
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            NameFull: Zhao, Ru-Song
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            – D: 15
              M: 02
              Text: Feb2026
              Type: published
              Y: 2026
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              Value: 530
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            – TitleFull: Chemical Engineering Journal
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