Preparation method of patterned photocatalytic membrane

The preparation method comprises the following steps: dissolving a high-molecular polymer in a good solvent, and stirring until the high-molecular polymer is completely and uniformly dissolved to obtain a high-molecular solution; sequentially adding a silane coupling agent and photocatalyst powder into the polymer solution, and uniformly stirring to obtain coating slurry; printing and dyeing the coating slurry on the surface of a substrate on printing and dyeing equipment by using a roller with a prefabricated specific pattern to obtain a film with a photocatalyst pattern; and drying the film with the photocatalyst pattern to obtain the patterned photocatalytic film. The photocatalytic membrane prepared by the invention has load stability, catalytic activity and aesthetic property, is compatible with industrial printing and dyeing equipment, can customize various patterns to meet personalized aesthetic requirements, has good mechanical properties and corrosion resistance, can utilize the catalyst to the maxim