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Abstract
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Porous organic polymers have attracted continuous attention due to their tunable porosity, structural versatility, and wide applicability in various fields. Among them, covalent triazine frameworks (CTFs) represent an important subclass, characterized by high specific surface area, a nitrogen-rich backbone, and robust triazine-based covalent linkages, which collectively impart excellent chemical and thermal stability. Despite these advantages, most of the reported CTFs have been synthesized under harsh reaction conditions, while samples prepared via mild synthetic routes remain scarce. In this study, a novel CTF was synthesized under mild solvothermal conditions using melamine and a mixed dicarboxylic acid linker system. Employing a mixture of linkers resulted in improved properties compared to CTFs prepared with each linker separately. The adsorption performance of the resulting framework toward organic dyes in aqueous solutions was systematically evaluated. The synthesized material was characterized by Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), Brunauer–Emmett–Teller (BET) surface area analysis, X-ray diffraction (XRD), and field-emission scanning electron microscopy (FE-SEM). The results demonstrate that the proposed synthesis strategy offers a practical route for developing CTFs with potential applications in wastewater treatment
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