| Unraveling photocatalytic degradation of Malachite Green over a magnetic Chitosan/Covalent-Organic Framework Composite under Visible Light |
| کد مقاله : 1220-IWWA |
| نویسندگان |
|
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 magnetic chitosan/covalent organic framework (CS/COF) composite was developed as a multifunctional photocatalyst for the efficient visible-light-driven degradation of Malachite Green (MG) in contaminated water. The composite integrates chitosan, a bio-based, non-toxic, renewable, and biodegradable polymer, with a porous COF and magnetic Fe3O4 nanoparticles, providing complementary adsorption, photocatalytic, and magnetic separation functionalities. The optimized CS/COF composite achieved 70% removal of MG (20 mg/L) under visible-light irradiation, demonstrating the synergistic contribution of pollutant adsorption and photocatalytic oxidation. The enhanced performance was associated with improved pollutant–catalyst interactions and more efficient utilization of photogenerated charge carriers within the heterostructured system. Radical-scavenging experiments indicated that hydroxyl radicals (•OH) were the predominant reactive species responsible for MG degradation. Moreover, the magnetic composite could be rapidly separated from the treated solution using an external magnetic field and retained substantial photocatalytic activity after five consecutive cycles. These findings highlight the potential of magnetic CS/COF composites as recyclable and sustainable materials for visible light driven removal of organic pollutants from aqueous environments. |
| کلیدواژه ها |
| Magnetic ternary composite, Covalent organic framework (COF), Chitosan biopolymer, Malachite Green, Visible light photodegradation, Wastewater treatment |
| وضعیت: پذیرفته شده برای ارائه شفاهی |
