Adsorption of textile dyes using metal-organic framework [Cu3(BTC)2(H2O)3]n obtained by electrochemical synthesis

Abstract

Metal-Organic Framework (MOF) is a coordination network with organic binders and porous structure. The objective of this research was to synthesize the MOF of [Cu3(BTC)2(H2O)3]n by electrochemical route and to apply it as adsorbent material for removal of dyes from tissues in effluents. The synthesis of this MOF was given electrochemically via amperometric, setting the potential at 12V for 17 min, resulting in 73% yield of a blue solid. The final product was used in its crude form and characterized by FTIR and cyclic voltammetry. This MOF, when in contact with a mixture that simulates an effluent of the textile industry, allowed its discoloration, accompanied by the decanting of a colored solid. This depigmentation was also observed by analysis of the supernatant by UV-Vis spectroscopy. The FTIR spectrum of the solid decanted after mixing the MOF with the dye showed the adsorption of the pigments from the solution by the MOF. This solid MOF residue was environmentally advantageous because it was easily separated from the treated effluent and being regenerated and reusable. This differentiates it from the sludge generated in traditional coagulation/flocculation process that can be harmful to the environment.