Document Type

Article

Publication Date

Summer 7-7-2026

Abstract

This study reported the synthesis, electrospinning, and heavy metal adsorption of covalent organic frameworks (COFs) integrated into poly(methyl methacrylate) (PMMA) nanofibers. COF-1 and COF-2 were synthesized by solvothermal and reflux techniques, respectively, and subsequently incorporated into PMMA via electrospinning with different loadings (0.1%, 0.5%, and 1.0%). The synthesized PMMA_COF nanofibers were analyzed utilizing X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and diffuse reflectance spectroscopy (DRS). PMMA_COF nanofibers with fiber diameters of 350-450 nm were obtained. The structural and morphological investigations validated the effective integration of COFs into the PMMA matrix, with COF-1 demonstrating superior dispersion and retention of porosity compared to COF-2. The optical measurements indicated a decrease in bandgap energy upon the inclusion of COF, thereby improving light-absorption capabilities. Studies on heavy metal adsorption revealed that PMMA_COF-1 nanofibers displayed a greater capacity for Cu2+ adsorption than PMMA_COF-2, with an optimal loading of 0.5% for COF-1. Selectivity experiments showed a preference for Cd2+, Cr6+, and Ni2+ ions over other investigated heavy metals. The results show the efficacy of COF-based electrospun nanofibers for effective heavy metal remediation in water treatment applications.

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