Abstract
Ti3C2Tx is a two-dimensional (2D) material belonging to the MXenes family. It has a unique combination of functional features that make it appropriate for a wide range of fascinating applications, including supercapacitors, batteries, strain sensors, photocatalysis, and more. In this study, we report a synthesis of Ti3C2-TiO2 nanocomposites with tight interfacial contact that has been successfully fabricated by in situ development of TiO2 nanoparticles (NPs) on the surface of Ti3C2Tx nanosheets (NSs) via a simple and cost-effective hydrothermal process. The catalysts are well characterized by various sophisticated techniques, including X-ray photoelectron spectroscopy (XPS), photoluminescence (PL), Brunauer-Emmett-Teller (BET), CHI660E electrochemical workstation, and HRTEM. The photocatalytic performance of pure Ti3C2Tx, Ti3C2-TiO2 (MT1), and Ti3C2-TiO2 (MT5) nanocomposites was evaluated by highly selective photo-oxidation of biomass-derived furfuryl alcohol (FA), cinnamyl alcohol, vanillin alcohol, and various aromatic alcohols to the corresponding aldehyde with >99% selectivity for all the alcohol substrates under visible light (385–740 nm). Photocatalytic oxidation results revealed that Ti3C2-TiO2 (MT5) has superior photocatalytic activity than Ti3C2-TiO2 (MT1) and pure Ti3C2Tx NSs. The exceptional photocatalytic activity was attributed to the composite's unique morphology and characteristics.
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