LAUSR

The preparation of a hybrid magnetic MOF@Carbon from a MOF-derived porous carbon is reported. MOF-74(Co) is used as a precursor for the synthesis of a magnetic carbon with homogeneous cobalt particles distribution (C-MOF-74) by a direct carbonization step. The cobalt particles present in the carbon are partially converted to ZIF-67 by reaction with of 2-methylimidazole to obtain a core-shell ZIF-67@C-MOF-74. The effect of the reaction time and 2-methylimidazole concentration in the conversion procedure is studied by X-ray diffraction and scanning microscopy. Due to its high surface area, dual porosity and magnetic properties, ZIF-67@C-MOF-74 exhibits high extraction capacity (180 mg g-1), fast adsorption rate and excellent recyclability for Congo Red adsorption. In addition, the prepared material shows high efficiency in the extraction of different phenolic compounds. The developed procedure can be easily adapted to different carbons and MOFs thus potentially enabling the preparation of a wide number of new hybrid materials.