Synthesis of a Magnetic Co@C Material via the Design of a MOF Precursor for Efficient and Selective Adsorption of Water Pollutants

3D metal–organic frameworks (MOFs) can be appropriate templates for the fabrication of nanomaterials due to they have active sites exposed on channel or surface, which thus provide them with improved catalytic performance. In this study, a cobalt-based MOF [Co(H2bpta)]n (Co-MOF), where H4bpta denotes 2,2′,4,4′-biphenyltetracarboxylic acid, has been constructed use ligand high carbon content. On basis, 2D magnetic carbon-coated cobalt nanoparticle composite (Co@C) was prepared by using title under different temperatures. Magnetic Co@C readily absorb dye from solution and act as an inexpensive fast-acting adsorbent. Moreover, we explored adsorption isotherms, kinetics thermodynamics anion dyes in detail. The capacity Co@C-800 investigated methyl orange (MO) congo red (CR) were 773.48 495.66 mg g−1, respectively. It is noteworthy that MO higher existing materials. Thermodynamic studies suggest processes are spontaneous exothermic. This study opens new insight into synthesis application carbon-based materials enable selective removal organic dyes.Graphical AbstractA Co-MOF solvothermal synthesized structurally characterized, used combined catalyst source Co@C. Interestingly, as-grown exhibits high-performance anionic (MO CR) capacities.