The fragmented 3D-covalent organic framework in cellulose acetate membrane for efficient phenol removal

Mohammed, Abdul Khayum; Ali, Jisha Kuttiani; Kuzhimully, Mahira  Bashri Selman; Addicoat, Matthew A.; Varghese, Sabu; Baias, Maria; Alhseinat, Emad; Shetty, Dinesh

doi:10.1016/j.cej.2023.143234

Cited by 11 publications

(5 citation statements)

References 30 publications

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“…[88] Recently, we have integrated functionally diverse 3D-COFs (TamDbta) as pillars in bio-based cellulose acetate (CA) polymeric membranes to fabricate MMMs, denoted TamDbta-CA-1 and TamDbta-CA-2 (Figure 10). [47] According to our findings, TamDbta-CA-1 and TambDbta-CA-2 displayed a water flux of 106 and ~40 L m À 2 h À 1 , respectively, compared to the CA membrane (108 L m À 2 h À 1 ). The reduced water flux could be from the characteristics of the solvents employed during the fabrication of the membranes, which led to fluctuating selfassembly patterns of linear polymers.…”

Section: Removal Of Toxic Organic Solventssupporting

confidence: 57%

“…Shetty and co-workers, fabricated a MMM using 3D TamDbta COF and cellulose acetate (CA), via the phase inversion method. [47] The TamDbta COF, featuring unreacted aldehyde groups and hydrophobic bromine atoms, was initially synthesized via interfacial polymerization (IP) (Figure 3a). The presence of aldehyde groups facilitated the dispersion of TamDbta in the polar N-Methyl-2-pyrrolidone (NMP) solvent.…”

Section: Fabrication Of Cof Mixed Matrix Membranesmentioning

confidence: 99%

“…f) The regeneration performance analysis of TamDbta-CA-2. Reproduced from ref [47]. Copyright (2023), with permission from Elsevier.…”

mentioning

confidence: 99%

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Covalent Organic Framework‐derived Composite Membranes for Water Treatment

Elmerhi,

Kumar,

Abi Jaoude

et al. 2023

Chemistry An Asian Journal

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Water treatment has experienced a surge in the adoption of membrane separation technology. Covalent organic frameworks (COFs), a class of metal‐free and open‐framework materials, have emerged as potential membrane materials owing to their interconnected periodic porosity, tunability, and chemical stability. However, the challenges associated with processing COF powders into self‐standing membranes have spurred the emergence of COF composite membranes. This review article highlights the rationale behind developing COF composite membranes and their categories, including mixed matrix membranes (MMMs) and thin film composite (TFC) membranes. The common fabrication techniques of each category are presented. In addition, the influence of COF additives on the performance of the resultant composite membranes is systematically discussed, with a focus on the recent progress in applying COF composite membranes in the separation of different categories of water pollutants, including organic ions/molecules, toxic solvents, proteins, toxic heavy metals, and radionuclides.

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Section: Removal Of Toxic Organic Solventssupporting

confidence: 57%

Section: Fabrication Of Cof Mixed Matrix Membranesmentioning

confidence: 99%

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Covalent Organic Framework‐derived Composite Membranes for Water Treatment

Elmerhi,

Kumar,

Abi Jaoude

et al. 2023

Chemistry An Asian Journal

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“…Although the three-dimensional framework COF-300 was first reported in 2009, until now chemists had not succeeded in functionalizing COF-300 beyond the addition of −OH or −Br groups. − Herein, we have shown that linkage transformation is a versatile way to functionalize COF-300 with alkyl, acetyl, or trifluoroacetyl groups. The resulting library of COF-300 derivatives led to the discovery of an outstanding PFAS adsorbent, COF-300-dimethyl, with a saturation capacity for perfluorooctanoic acid exceeding 250 mg/g.…”

Section: Discussionmentioning

confidence: 89%

Linkage Transformations in a Three-Dimensional Covalent Organic Framework for High-Capacity Adsorption of Perfluoroalkyl Substances

Zeppuhar,

Rollins,

Huber

et al. 2023

ACS Appl. Mater. Interfaces

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Despite their many advantages, covalent organic frameworks (COFs) built from three-dimensional monomers are synthetically difficult to functionalize. Herein, we provide a new synthetic approach to the functionalization of a three-dimensional covalent organic framework (COF-300) by using a series of solidstate linkage transformations. By reducing the imine linkages of the framework to amine linkages, we produced a more hydrolytically stable material and liberated a nucleophilic amino group, poised for further functionalization. We then treated the amine-linked COF with diverse electrophiles to generate a library of functionalized materials, which we tested for their ability to adsorb perfluoroalkyl substances (PFAS) from water. The framework functionalized with dimethylammonium groups, COF-300-dimethyl, adsorbed more than 250 mg of perfluorooctanoic acid (PFOA) per 1 g of COF, which represents an approximately 14,500-fold improvement over that of COF-300 and underscores the importance of electrostatic interactions to PFAS adsorption performance. This work provides a conceptually new approach to the design and synthesis of functional three-dimensional COFs.

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“…Under conditions of 298 K and 1 bar, COF-300-rt, COF-300-st, and LZU-111 demonstrated higher adsorption capacities for benzene (251, 221, and 214 cm 3 •g -1 ) compared to cyclohexane (175, 133, and 164 cm 3 •g -1 ). Li et al introduced a novel class of imine-linked 3D COFs with a boron-based topology, exhibiting exceptional adsorption capacity for benzene vapor (1,203.9 mg•g -1 ) at 298 K [121] . Mohammed et al successfully demonstrated the application of a 3D-COF with cellulose acetate as a mixed-matrix membrane for removing over 80% of phenol from wastewater [122] .…”

Section: Capture Of Other Organic Carbonmentioning

confidence: 99%

Advancements and applications of three-dimensional covalent organic frameworks

Wang,

Zhao,

Fang

et al. 2024

Chem Synth

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Covalent organic frameworks (COFs) represent an emerging class of crystalline porous polymers characterized by their pre-designed interconnected structures formed via dynamic covalent bonds. These materials have garnered widespread attention in recent years. While applications of two-dimensional (2D) COFs have been extensively investigated since 2005, their practicality has been impeded by their limited specific surface area and the robust π-π stacking interaction. In contrast, three-dimensional (3D) COFs boast enhanced porosity, larger specific surface area, well-exposed functional groups, and an abundance of reaction sites, positioning them at the forefront of porous material research. They find extensive applications in diverse fields, including adsorption, separation, catalysis, and so on. This featured article provides a comprehensive exploration of the latest advancements in 3D COFs across their respective application domains. Additionally, we outline the current challenges that must be addressed and shed light on the promising prospects for the utilization of 3D COFs.

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The fragmented 3D-covalent organic framework in cellulose acetate membrane for efficient phenol removal

Cited by 11 publications

References 30 publications

Covalent Organic Framework‐derived Composite Membranes for Water Treatment

Covalent Organic Framework‐derived Composite Membranes for Water Treatment

Linkage Transformations in a Three-Dimensional Covalent Organic Framework for High-Capacity Adsorption of Perfluoroalkyl Substances

Advancements and applications of three-dimensional covalent organic frameworks

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