Ce-MOF infused membranes with enhanced molecular sieving in the application of dye rejection

Nellur, Usha; Naik, Nagaraj S.; Rego, Richelle M.; Kigga, Madhuprasad; Arthanareeswaran, G.; Padaki, Mahesh

doi:10.1039/d2ew00931e

Cited by 9 publications

(2 citation statements)

References 64 publications

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“…As seen, the enhanced wettability and adsorption efficiency of the membranes can be attributed to the effective interaction of MOFs with the membranes through their ligands. Compared to other MOF membranes, the conducive properties of Zr-ATP MOFs owing to their amino ligands established functional interactions with the polymer matrix, facilitating enhanced adsorption of dyes on the membrane surface. − …”

Section: Resultsmentioning

confidence: 99%

Synergy of Ligands in Tailoring the Photocatalytic Properties of Zirconium Metal–Organic Framework-Impregnated Membranes for Water Treatment

Karthik,

Vinothkumar,

Mohan

et al. 2024

Ind. Eng. Chem. Res.

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The Zr-based metal−organic framework (MOF) nanoparticles by varying three different ligands (2-methylimidazole, 2-aminoterephthalic acid, and terephthalic acid) are synthesized using a solvothermal method and impregnated into polysulfone membranes. These MOF membranes served as photocatalytic membranes and facilitated both the separation and degradation of dyes in water. Both the XRD and IR analysis revealed that the MOFs are well interacting with the membrane matrix, manifesting effective hydrophilic and surface potential properties confirmed by contact angle, water uptake, and zeta potential analyses. The FESEM images revealed that the MOFs are exposed on the surface, supporting the enhanced dye separation and photocatalytic properties. Further, the cross-sectional images showed that the pore channels in MOF membranes are block-free, smooth, and uniform. These features facilitated the enhanced flux and antifouling properties of MOF membranes compared to bare ones. As a result, the optimized MOF membrane (i.e., amine functionalized Zr-MOF-impregnated membrane) showed an enhanced water flux of around 57 L/m 2 h, while it is ∼25 L/m 2 h in the case of the bare membrane. The dye (rhodamine B and Congo red) rejection efficacy values of this MOF membrane are around 81.6 and 75.8%, respectively, which are around 2-fold higher than the bare one. Similarly, the RhB/CR dye solution flux of the MOF membrane is around 39.6/33.3%, respectively, while it is only around 10.2/10.4% in the case of the bare membrane. These MOF membranes also showed enhanced fouling resistance compared to bare ones, estimated through reversible and irreversible fouling estimations. Furthermore, the photocatalytic efficiency of the MOF membrane is appreciable, which degraded around 10.7/8.2% of RhB/CR dye, respectively. These add-on features induced by MOFs can considerably reduce the overall process cost of the membrane separation and, especially, the cost involving not only the regeneration and self-cleaning of the membranes but also the safe disposal of the dyes separated on the membrane surface.

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Section: Resultsmentioning

confidence: 99%

Synergy of Ligands in Tailoring the Photocatalytic Properties of Zirconium Metal–Organic Framework-Impregnated Membranes for Water Treatment

Karthik,

Vinothkumar,

Mohan

et al. 2024

Ind. Eng. Chem. Res.

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“…They are two- or three-dimensional structures obtained by bonding of ionic metals or metal clusters with organic ligands, in which metal ions are coordination centers of the structure, and organic ligands are linkers between these centers. MOFs have recently gained attention because they are highly suited for a range of applications, including chromatographic separation, , gas storage, , molecular sieving, , chemical/biosensors, , medical imaging, , heterogeneous catalysis, , and drug release, , etc., due to their vast surface areas and predictable and controllable pore diameters. These adjustable properties and structures of MOFs depend on the central metal ion, ligand structure, metal–ligand ratio, type of solvent, pH, and temperature.…”

Section: Introductionmentioning

confidence: 99%

Novel Tannic Acid-Modified Cobalt-Based Metal–Organic Framework: Synthesis, Characterization, and Antimicrobial Activity

Ant Bursalı

2024

ACS Omega

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Metal–organic frameworks (MOFs) are a class of hybrid inorganic–organic materials with typical porous structures and a unique morphology. Due to their diversity, they are extensively used in a wide range of applications such as environmental, catalysis, biomedicine, etc. In this study, a novel cobalt-based MOF modified with tannic acid (Co-TPA/TA) (TPA: terephthalic acid; TA: tannic acid) as a promising material for antimicrobial agents was synthesized and characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy with energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, inductively coupled plasma-optical emission spectrometry, and thermogravimetric analysis and compared with an as-synthesized cobalt-based framework. Co-TPA/TA demonstrated good antimicrobial efficiency under optimum conditions against yeast Candida albicans ATCC 10231, Gram-negative Escherichia coli ATCC 8739, and Gram-positive Staphylococcus aureus ATCC 6538 with an inhibition zone ranging from 14 to 20 mm. Reduced ATP levels, generation of reactive oxygen species, membrane damage from cobalt ion release, and development of an alkaline microenvironment could all be contributing factors to the possible antimicrobial pathways. The novel framework can be obtained using simple, affordable, and easily accessible commercial ligands and is considered to have the potential to be used as an antimicrobial material in the future.

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Nanocomposite ZIF-8@Active Carbon-co-Chitosan incorporated nanofiltration membrane with enhanced antifouling property and high separation efficiency to salt, heavy metals, and dye solutions

Afshari,

Moghadassi,

Mohsen Hosseini

2024

Arabian Journal of Chemistry

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Ce-MOF infused membranes with enhanced molecular sieving in the application of dye rejection

Abstract: An affordable typical nuclide, cerium, found as one of the radioactive wastes, has been employed to prepare MOFs as a practice of recycling and reuse. Further, Ce-based MOF-infused membranes were developed for high-efficiency molecular separation.

Cited by 9 publications

References 64 publications

Synergy of Ligands in Tailoring the Photocatalytic Properties of Zirconium Metal–Organic Framework-Impregnated Membranes for Water Treatment

Synergy of Ligands in Tailoring the Photocatalytic Properties of Zirconium Metal–Organic Framework-Impregnated Membranes for Water Treatment

Novel Tannic Acid-Modified Cobalt-Based Metal–Organic Framework: Synthesis, Characterization, and Antimicrobial Activity

Nanocomposite ZIF-8@Active Carbon-co-Chitosan incorporated nanofiltration membrane with enhanced antifouling property and high separation efficiency to salt, heavy metals, and dye solutions

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