A New 2D Metal-Organic Framework for Photocatalytic Degradation of Organic Dyes in Water

Abstract

Two–dimensional (2D) metal–organic frameworks (MOFs) are fascinating photocatalytic materials because of their unique physical and catalytic properties. Herein, we report a new (E)–4–(3–carboxyacrylamido) benzoic acid [ABA–MA] ligand synthesized under facile conditions. This ABA–MA ligand is further utilized to synthesize a copper-based 2D MOF via the solvothermal process. The resulting 2D MOF is characterized for morphology and electronic structural analysis using advanced techniques, such as proton nuclear magnetic resonance, Fourier-transform infrared spectroscopy, ultraviolet–visible spectroscopy, and scanning electron microscopy. Furthermore, 2D MOF is employed as a photocatalyst for degrading organic dyes, demonstrating the degradation/reduction of methylene blue (MeBl) dye with excellent catalytic/photodegradation activity in the absence of any photosensitizer or cocatalyst. The apparent rate constant (kap) values for the catalytic degradation/reduction of MeBl on the Cu(II)–[ABA-MA] MOF are reported to be 0.0093 min−1, 0.0187 min−1, and 0.2539 min−1 under different conditions of sunlight and NaBH4. The kinetics and stability evaluations reveal the noteworthy photocatalytic potential of the Cu(II)–[ABA–MA] MOF for wastewater treatment. This work offers new insights into the fabrication of new MOFs for highly versatile photocatalytic applications.

Exploring microgel adsorption: synthesis, classification, and pollutant removal dynamics

“…Previous studies have established that metal cations readily form complexes with functional group-containing nitrogen and oxygen in microgels. [130][131][132] The metal cations are electron-decient species, and this deciency of metal cations is ful-lled by getting electrons from electron-donating sites of microgels through coordinate covalent bonds. Similarly, other pollutants such as organic dyes and anions can also be removed by microgels.…”

A review of metal–organic framework (MOF) materials as an effective photocatalyst for degradation of organic pollutants

“…154 Conversely, pristine MOFs have seen limited utilization in degrading organic pollutants, while nano-sized MOF materials and POM-based MOF materials have gained prominence due to their numerous active sites and functional behavior. 155,156 In a recent report, Kim et al conducted a study that synthesized a Zr-based MOF using pyrene and porphyrin building blocks, resulting in a nano-sized material. 157 The nano size mixed ligand MOF (nMLM) was employed to degrade Rh-B in the presence of H 2 O 2 .…”

Novel synthetic approach of 2D-metal–organic frameworks (MOF) for wastewater treatment

“…4ABA-MA complexes from both sides to form the 2D hexagonal Cu(II)-[4ABA-MA] MOF. This 2D MOF photocatalyzes the degradation/reduction of methylene blue (MB) dye from wastewater without a photosensitizer or cocatalyst [153].…”