▎ 摘　　要

NOVELTY - Preparation of CNT/titanium dioxide flexible composite film involves electrifying two ends of CNT film, increasing the temperature to required temperature using Joule heat generated from self resistance of film, and carrying out rapid in-situ oxidation on MXene on the surface of the CNT film to achieve fast and efficient preparation of titanium dioxide nanoparticles. USE - Preparation of CNT/titanium dioxide flexible composite film. ADVANTAGE - The method provides composite film by directly electrifying and heating in a short time, saves energy, ensures high efficiency, and can rapidly oxidize titanium carbide due to the high Joule heating temperature of CNT film, which has characteristics of fast response, low energy consumption and wide controllable temperature range, thus replacing the traditional physical crushing, liquid phase or gas phase method and other low-efficiency and energy-consuming preparation method.