▎ 摘　　要

NOVELTY - Method for preparing wallpaper composite material for indoor formaldehyde purification involves (1) preparing flake MXene/sulfur-doped graphene quantum dots (S-GQDs)/titanium dioxide by firstly carrying out ultrasonic treatment on S-GQDS and titanium dioxide, subjecting to hydrothermal reaction, drying and grinding to obtain S-GQDs/titanium dioxide composite material, adding the composite material to a hydrochloric acid solution for protonation, adding MXene for stirring and performing electrostatic self-assembly and (2) preparing a wallpaper base paper as a paper-based carrier, dispersing the flake MXene/S-GQDs/titanium dioxide in an ethanol solution, uniformly applying to the surface of the wallpaper base paper by adopting a coating method and drying. USE - The method is useful for preparing wallpaper composite material for indoor formaldehyde purification. ADVANTAGE - The method can realize layer-by-layer transmission of electrons under light excitation and improve photocatalytic efficiency, achieves adhesive effect, improves stability and strength of the flake MXene/SGQDs/titanium dioxide structure and provides the wallpaper composite material which has significant effect on purifying indoor formaldehyde and can synergistically increase the photocatalytic contact area and efficiency of MXene/SGQDs/titanium dioxide.