عنوان مقاله [English]
In this work, graphene–magnetic palladium nanohybrid catalyst (G@Fe3O4@SiO2@Im-Pd) has been fabricated via a facile approach, and be developed as a highly active and stable photocatalyst for degradation of 2,4- dichlorophenol (2,4-DCP) under visible light irradiation. The influence of reaction parameters such as time, the dependence of degradation to the presence of the catalyst and light irradiation, pH, and also the reusability of the photocatalyst on the degradation yield have been investigated. The best yield for degradation of 2,4-dichlorophenol was obtained at acidic pH under visible light irradiation. The presence of Fe3O4 nanoparticles in the composite gives it a magnetic property and therefore can be easily recovered from the reaction mixture using an external magnet and used repeatedly. The use of recycled catalyst after five recycling times did not show a significant reduction in activity. Also, Magnetic separation is an environmentally friendly method for the separation and recovery of catalysts, since it minimizes the use of solvents, reduces operation time, minimizes catalyst loss by preventing mass loss and oxidation.