Boronic Acid Functionalized Zirconium based MOF for the Complete Adsorptive Removal of Alizarin Dye

Abstract

Nowadays, one of the severe problems that threaten the survival of human beings is water pollution. Water pollution caused by diverse poisonous compounds, specifically hydroxyl aromatic compounds and their derivatives have been evident and prominent environmental issue. In this work, an adsorptive method to remove the hydroxyl aromatic compounds particularly catechol based Alizarin red S dye by the activated metal organic framework have been attempted. The nano scale Zr-UiO-66 was synthesized using terephthalic acid as ligand, 4-carboxy phenyl boronic acid as coordination modulator and the morphology of the nano crystals was octahedral. The as-synthesized new metal organic framework Zr-UIO-66 after adsorption confirms the existence of boronic acid and structural stability after the incorporation of the boronic acid group using adsorption studies such as 11B NMR, PXRD, UV, IR and TGA. The zirconium based MOFs are very important in terms of their stability in water. These MOFs are largely used for gas separation, storage, sensing and degradation of chemical warfare agents, etc. The control of size of these MOFs to nano regime can be achieved using the monocarboxylic acids like acetic acid, benzoic acid. A mixed-ligand approach was implemented in this work.