Facile fabrication of morphology-adjustable viologen-based ionic polymers for carbon dioxide immobilization and iodine vapor adsorption

Journal of Colloid and Interface Science, Год журнала: 2025, Номер unknown

Опубликована: Фев. 1, 2025

Язык: Английский

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New Viologen-Based Ionic Porous Organic Polymers for Efficient Removal of Anionic Dyes and Hexavalent Chromium (Cr (VI)) from Water

Molecules, Год журнала: 2025, Номер 30(5), С. 1123 - 1123

Опубликована: Фев. 28, 2025

Water pollution is a critical environmental issue in modern society, and adsorption recognized as straightforward efficient water purification technique. In this study, three new viologen-based ionic porous organic polymers were designed successfully synthesized via simple approach, their properties for pollutants evaluated. The cationic nature of these polymers, coupled with large conjugated π-electron system, physicochemical stability, aromatic backbone, contributes to high capacity rapid efficiency anionic contaminants such Methyl Orange, Congo Red, Cr (VI). exhibited maximum capacities 1617 mg/g MO, 3734 CR, 530.22 (VI), surpassing most previously reported adsorbents. Furthermore, the maintained removal rate even presence competing anions. Effective separation dyes from mixed solutions could be achieved through filtration. These characteristics make them promising candidates applications.

Язык: Английский

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Structural Modulation in Viologen‐Based Ionic Porous Organic Polymers for Catalytic Non‐Redox CO₂ Fixation

Macromolecular Chemistry and Physics, Год журнала: 2025, Номер unknown

Опубликована: Янв. 31, 2025

Abstract The rational design of metal‐free, porous, and heterogeneous catalysts with large specific surface areas for efficient CO 2 capture utilization has remained a significant challenge. In this study, two structurally distinct viologen‐based novel ionic porous organic polymers (iPOPs) featuring triazine core are developed, employing different polymerization methods to modulate their porosity catalytic properties. alkyne‐linked SC‐iPOP, synthesized through Sonogashira polycondensation, exhibits high (specific BET area: 616 ± 9 m g −1 ) over BHC‐iPOP secondary amine linkages fabricated by Buchwald‐Hartwig polymerization. SC‐iPOP demonstrates superior efficiency in the metal‐free cycloaddition epoxides form cyclic carbonates under atmospheric pressure solvent‐free conditions, excellent recyclability. This enhanced performance, compared BHC‐iPOP, is attributed presence abundant ‐philic active sites. current study emphasizes role structural modifications designing fixation.

Язык: Английский

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Advanced Pyrene Copolymer/rGO Hydrogels for Efficient Congo Red Removal from Aqueous Systems

ChemistrySelect, Год журнала: 2024, Номер 9(18)

Опубликована: Май 7, 2024

Abstract This study investigates the use of hydrogel semi‐interpenetrating polymer networks (semi IPN) as efficient adsorbents for removing dye congo red (CR) from aqueous solutions. Specifically, three semi IPN, namely AH0–AH2, were synthesized through redox polymerization acrylamide, poly ethylenimine, hydroxylethylmethacrylate and (pyren‐1‐yl)methyl methacrylate/2‐acrylamido‐2‐methylpropane‐1‐sulfonic acid copolymer (pyrene−AMPS) using a reduced graphene oxide (RGO)‐ N,N’ ‐methylene‐ bis (acrylamide) (MBA)‐based crosslinker (GABC). Results indicated that these hydrogels in CR at pH 6.73, with adsorption behaviour conforming to Langmuir isotherm. suggests monolayer pattern, indicating chemical nature. Thermodynamic analysis supports practical feasibility this process. The negative Gibbs free energy (ΔG̊) indicates is spontaneous favorable. Conversely, positive standard entropy (ΔS̊) an increase molecular randomness during Additionally, enthalpy change (ΔH̊) endothermic activation binding Response Surface Methodology (RSM), utilizing four variables was employed optimize removal CR. model demonstrated high R2‐values strong agreement between experimental projected results, affirming its reliability. AH1 AH2 showed significant efficacy solutions, underscoring their potential application wastewater remediation.

Язык: Английский

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Multi-Stimuli Responsive Viologen-Imprinted Polyvinyl Alcohol and Tricarboxy Cellulose Nanocomposite Hydrogels

Sensors, Год журнала: 2024, Номер 24(21), С. 6860 - 6860

Опубликована: Окт. 25, 2024

Photochromic inks have shown disadvantages, such as poor durability and high cost. Self-healable hydrogels photostability durability. Herein, a viologen-based covalent polymer was printed onto paper surface toward the development of multi-stimuli responsive chromogenic sheet with thermochromic, photochromic, vapochromic properties. Viologen created by polymerizing dialdehyde-based viologen hydroxyl-bearing dihydrazide in an acidic aqueous medium. The well immobilized colorimetric agent into polyvinyl alcohol (PVA)/tricarboxy cellulose (TCC)-based self-healable hydrogel. viologen/hydrogel nanocomposite films were applied surface. coloration measurements showed that when exposed to ultraviolet light, orange layer on switched green. photochromic film used develop anti-counterfeiting prints using organic hydrogel composed PVA/TCC composite polymer. Reversible photochromism strong observed papers UV irradiation. A detection limit monitored range 0.5-300 ppm for NH

Язык: Английский

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Rapid adsorption of iodine from water and reversible capture of iodine vapor using stilbene-crosslinked porous organic polymers

Journal of Water Process Engineering, Год журнала: 2024, Номер 68, С. 106386 - 106386

Опубликована: Окт. 28, 2024

Язык: Английский

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