| Covalent Organic Framework/Metal–Organic Framework composite for efficient adsorption of Malachite Green from water |
| کد مقاله : 1278-IWWA |
| نویسندگان |
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بهاره ربیعی1، نیازمحمد محمودی *2 1پست دکتری در پژوهشگاه رنگ 2پروفسور در پژوهشگاه رنگ، بزرگراه صیادشیرازی (به سمت شمال)، خروجی لویزان، میدان حسین‌آباد، خیابان وفامنش، نبش کوچه شمس، پلاک ۵۵. |
| چکیده مقاله |
| A covalent-organic framework/metal–organic framework (COF/MOF) binary composite was developed as an efficient adsorbent for the removal of MG from aqueous media. A melamine-based COF was synthesized through the hydrothermal reaction of melamine and 1,2-dibromoethane, followed by the in situ growth of zeolitic imidazolate framework-8 (ZIF-8) onto the COF surface at room temperature. The resulting binary COF/ZIF-8 composite exhibited a remarkable enhancement in malachite green (MG) removal compared with the pristine COF. While the melamine-based COF alone showed limited adsorption performance, removing only approximately 5% of MG from aqueous solution, incorporation of ZIF-8 dramatically improved the adsorption efficiency, achieving up to 95% MG removal. This pronounced enhancement can be attributed to the interaction between the COF and ZIF-8 components, which provides a more favorable adsorption environment and increases the availability of active sites for dye capture. The adsorption of MG onto the composite is proposed to involve multiple interactions, including π–π interactions between the aromatic structures of the adsorbent and dye molecules, hydrogen bonding, and metal–π interactions associated with the Zn centers of ZIF-8. These complementary interactions collectively contribute to the high affinity of the composite toward MG. The results demonstrate that in situ construction of ZIF-8 on a melamine-based COF represents a promising strategy for developing hybrid porous materials with enhanced adsorption performance for the removal of organic dyes from aqueous environments. |
| کلیدواژه ها |
| (COF/MOF) binary composite, Covalent organic framework, zeolitic imidazolate framework-8 (ZIF-8), Malachite Green, Adsorption, Wastewater treatment |
| وضعیت: پذیرفته شده برای ارسال فایل های ارائه پوستر |
