Method for constructing porous micro-nano structure, and material with porous micro-nano structure

A method for constructing a porous micro-nano structure, comprising the following steps:

• (1) thoroughly mixing glass powders and metal powders to obtain a mixture, wherein particle sizes of the glass powders are in a range from 500 mesh to 3,000 mesh and particle sizes of the metal powders are in a range from 50 nm to 100 μm;
• (2) cleaning a surface of a substrate to be coated, and drying the surface for later use;
• (3) coating the mixture onto the surface of the substrate, and conducting a film-forming treatment to form a coating on the surface of the substrate, wherein a temperature of the film-forming treatment and a melting point of the glass powders comply with the following formula:
• TformingTglass−50° C.,
• wherein Tforming represents the temperature of the film-forming treatment and Tglass represents the melting point of the glass powders;
• and the temperature of the film-forming treatment is in a range from 100° C. to 1,500° C.;
• and
• (4) constructing a surface structure of the coating to obtain a porous micro-nano structure coating on the surface of the substrate, wherein a surface of the porous micro-nano structure coating has a porous micro-nano structure;
• and a method for constructing the surface structure comprises one or a combination of two or more selected from a group consisting of acid etching treatment, alkali etching treatment, and anodic oxidation treatment.