Abstract
? 2022 Elsevier B.V.This work offers a simple and effective strategy to design a two-dimensional layer heterostructure of carbon/Ti-based oxide nanocomposites via a long-term oxidation process of MXene (Ti3C2Tx). Oxidation kinetics parameters concluded that MXene initially reacted with oxygen by forming the carbon layer and nanostructured Ti-based oxides with a homogeneous distribution, including TiOF2 and TiO2, whereas the further oxidation process was governed by oxygen diffusion. It suggested that lower oxidation temperature and longer time (300 °C/1 h) facilitated to fabricate carbon-supported TiO2 @TiOF2 heterojunction nanocomposites with a unique 2D layer structure, which achieved a 90 % removal of methylene blue (MB) at 1 h under visible light illumination, owning to its large specific surface area, good electronic conductivity, narrowed band-gap, enhanced absorption in the visible range and high charge separation efficiency. Hence, the designed MXene-derived oxides were considered as promising candidates for wide-range responsive photocatalytic degradation of pollutants.
NSTL
Elsevier