In the present study, Fe₃O₄@TiO₂/Cu₂O nanocomposites were synthetized and supported on granular activated carbon (GAC). The synthesized nanocomposite coated on GAC was used as catalyst in photocatalytic process for 2,4-dichloropenoxyacetic acid (2,4-D) removal from aqueous solutions. The coated nanocomposite was characterized using XRD, TEM, BET, VSM, UV–Vis DRS, SEM and EDX tests to evaluate its surface morphology and elemental compounds. Results indicated that the photocatalytic efficiency for the removal of 2,4-D was reduced with increasing solution pH, and the maximum removal efficiency was obtained at solution pH of 5. The photocatalytic efficiency was increased with increasing catalyst dosage from 0.1 to 0.4 g/L. The results implied that reaction temperature played a key role in the photocatalytic performance and the process efficiency increased with increasing reaction temperature in the range of 10–35 °C. The kinetic study showed that the photocatalytic process followed the first-order kinetic model. Moreover, in the photocatalytic process, ^·OH acted as the main agent for the oxidation of 2,4-D. According to the results, Fe₃O₄@TiO₂/Cu₂O magnetic nanocomposite supported on GAC offered a suitable performance after five cycles, and therefore, it can be used as a reusable and cost-effective catalyst for removing such toxins from polluted waters.

在本研究中，Fe ₃ O ₄ @TiO ₂ / Cu ₂ O纳米复合材料被合成并负载在颗粒状活性炭（GAC）上。GAC包覆的合成纳米复合材料被用作2,4-二氯苯氧乙酸（从水溶液中除去2，4-D）。使用XRD，TEM，BET，VSM，UV-Vis DRS，SEM和EDX测试对涂层的纳米复合材料进行表征，以评估其表面形态和元素化合物。结果表明，随着溶液pH值的增加，去除2,4-D的光催化效率降低，在溶液pH为5时获得最大去除效率。随着催化剂用量的增加，光催化效率从0.1 g / g增加到0.4 g / g。 L. 结果表明，反应温度在光催化性能中起着关键作用，并且随着反应温度在10-35°C范围内升高，工艺效率也随之提高。动力学研究表明，光催化过程遵循一阶动力学模型。此外，在光催化过程中，^·OH充当2,4-D氧化的主要试剂。根据结果​​，GAC上负载的Fe ₃ O ₄ @TiO ₂ / Cu ₂ O磁性纳米复合材料在五个循环后表现出合适的性能，因此，它可以用作可重复使用且具有成本效益的催化剂，以去除污染物中的此类毒素。水域。