▎ 摘　　要

NOVELTY - Preparing titanium dioxide-tin dioxide-graphene composite photocatalyst involves heating titanium sheet under acetone atmosphere, and cooling to obtain a titanium sample having carbon shell coated titanium dioxide on the surface. The titanium sample having the carbon shell-coated titanium dioxide on the surface is immersed in a hydrothermal solution containing a tin source, and hydrothermally treated at 150-240 degrees C for 1-24 hours to form tin dioxide on the surface of titanium dioxide. A tin dioxide graphene composite structure is formed on the surface of the titanium dioxide to obtain a titanium dioxide-tin oxide-graphene composite photocatalyst. USE - Method for preparing titanium dioxide-tin dioxide-graphene composite photocatalyst (claimed). ADVANTAGE - The method enables to prepare photocatalyst that has a micro-composite nanostructure with nanostructured tin dioxide and graphene nanorods grown on the surface. In the rhodamine B degradation experiment, the photocatalyst has a high degradation rate of rhodamine B, and has good visible light responsiveness and photocatalytic activity.