Photocatalytic structure and method for making the same

A photocatalytic structure comprising:

• a substrate;
• a photocatalytic active layer directly located on and being in contact with the substrate;
• and
• a metal layer on a surface of the photocatalytic active layer away from the substrate;
• wherein the substrate consists of a base and a patterned bulge layer on a surface of the base, the patterned bulge layer is a net-like structure comprising a plurality of strip-shaped bulges intersecting with each other and a plurality of indents are defined by the plurality of strip-shaped bulges, the patterned bulge layer and the base are an integrated structure and made of a same material, and a material of the substrate is polyethylene terephthalate, polyimide, polymethyl methacrylate, polydimethylsiloxane, or polyethylene naphthalate;
• the photocatalytic active layer is on a surface of the patterned bulge layer, and the photocatalytic active layer covers both the plurality of strip-shaped bulges and the plurality of indents;
• and the metal layer consists of a plurality of nanoparticles on a surface of the photocatalytic active layer away from the substrate.