▎ 摘　　要

NOVELTY - Titanium dioxide photocatalyst, comprises 1.8-2.5 pts. wt. silver-linear nano titanium dioxide, and 1.6-2.2 pts. wt. graphene oxide. USE - The titanium dioxide photocatalyst is used in the treatment of industrial sewage. ADVANTAGE - The titanium dioxide photocatalyst: has high activity and catalytic effect; has a long service life, which brings a good application prospect to the treatment of industrial sewage. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing titanium dioxide photocatalyst, comprising (1) taking graphene oxide dispersed in the mixed solution of the ethanol and water, adding silver-linear nano titanium dioxide, ultrasonic processing for 1-2 hours to obtain the first mixed material, and (2) placing first mixed material obtained in step 1 into the reaction device, carrying out hydro-thermal reaction at 100-150 ° C for at least 1.5 hours, taking out, washing, and drying to obtain the double-doped titanium dioxide photocatalyst.