Synthesis and characterization of bimetallic Ni‐Cu‐BDC from waste plastic as a highly efficient CO₂/N₂ selective adsorbent

Abstract

In this work, a bimetallic Ni‐Cu‐BDC metal‐organic framework system was developed via solvent thermal approach with using an organic ligand recycled from waste plastic. The physical properties of Cu‐BDC and bimetallic Ni‐Cu‐BDC were characterized by X‐ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X‐ray spectroscopy (EDX) and N2 isotherms adsorption‐desorption (BET). The results have demonstrated the formation of Ni‐Cu‐BDC crystals with a highly porous structure (surface area up to 502 m2/g and pore volume about 0.208 cm3/g) and particle size of 2‐3 μm. Importantly, the Ni‐Cu‐BDC exhibited superior CO2 adsorption capacity of 5.85 mmol/g at 20°C and 1 atm. These findings indicated the potential application of bimetallic MOFs in CO2 capture technologies to fight global warming.