Synthesis and adsorption applications of a novel Ni-MOF@2DPA-1 COF hybrid material

Abstract

The novel porous material MOF@COF, due to its controllability, porosity and stability, has outstanding capabilities in the field of adsorption. In this study, a Ni-MOF was successfully combined with a 2DPA-1 COF to prepare a hybrid material with mesopores and multilayer structures. The Ni-MOF@2DPA-1 COF exhibits an excellent adsorption effect on dyes through electrostatic and π–π interactions. Experiments show that when pH = 7, it exhibits the best adsorption effect on methylene blue (MB), methyl orange (MO) and crystal violet (CV), and the maximum adsorption capacities are 103.4 mg g⁻¹, 95.7 mg g⁻¹ and 84.6 mg g⁻¹ respectively. Meanwhile, the high adsorption efficiency was maintained after five cycles, indicating that the Ni-MOF@2DPA-1 COF is a promising recyclable wastewater treatment material.