Synthesis, Characterization and Catalytic Activity of Polyethylene Glycol (PEG) Functionalized MXene (Ti3C2Tx)

Two-dimensional (2D) transition metal carbides and nitrides, collectively known as MXenes (e.g., Ti₃C₂T_x), have garnered significant attention due to their exceptional physicochemical properties and wide-ranging applications. In this study, we systematically explore the synthesis, functionalization, and catalytic performance of MXene modified with polyethylene glycol (PEG) for the degradation of the organic dye methylene blue (MB). The functionalization process is carefully characterized, revealing that PEG incorporation enhances the hydrophilicity, colloidal stability, and catalytic activity of MXene. Through detailed mechanistic studies, we elucidate the synergistic effects of the MXene framework and PEG functional groups, which collectively contribute to the accelerated degradation kinetics of MB. Remarkably, the PEG-functionalized MXene achieves a first-order rate constant of 0.16581 ± 0.030 min⁻¹, demonstrating its superior catalytic efficiency. These findings not only highlight the transformative potential of organic molecule functionalization in tailoring MXene properties but also underscore its promise as a high-performance material for advanced environmental remediation technologies. While many studies have focused on the degradation of MB dye, the use of MXene functionalized with PEG for this purpose remains relatively novel. Unlike traditional materials, MXene's excellent conductivity and hydrophilic properties, enhanced by PEG functionalization, present a promising alternative for dye degradation. Here a foundational understanding of MXene-based composites and their application in sustainable water treatment processes.