Preparation method and device of photocatalysis thin film

Abstract

The invention discloses a preparation method and device of a photocatalysis thin film. The method is characterized in that polyolefin resin is used as a carrier; a magnetic photocatalyst, an activated foaming agent, a dispersing agent, a coupling agent and a lubricating agent are added for extrusion granulation; film blowing is performed through a film blowing machine under the effect of an applied magnetic field. The film blowing machine successively comprises a hopper, an extruding material conveying shaft mechanism, a film blowing device, an electromagnetic induction coil and an electromagnetic induction coil controller; the electromagnetic induction coil is erected on the position of a blow molding die head of the film blowing device; materials enter the film blowing machine from the hopper; through the extruding material conveying shaft mechanism, fusion, shearing and blending are performed; then, through the film blowing device, the materials pass through the electromagnetic induction coil from the blow molding die head of the film blowing device; blow molding is performed to form the film. The photocatalysis thin film has the advantages that the catalytic efficiency is high; the weight is light; the photocatalysis thin film can be recovered and repeatedly used, and the like. The preparation method has the advantages that the cost is relatively low; the preparation process is simple.

Description

technical field [0001] The invention belongs to the environmental protection field of waste water and waste gas treatment, and in particular relates to a preparation method and device of a photocatalytic film. Background technique [0002] TiO 2 It is a typical photocatalyst with excellent physical and chemical properties such as non-toxic, cheap and easy to obtain, stable chemical properties and high photocatalytic activity. It is widely used in photocatalytic water splitting, photodegradation of pollutants, solar cells and other fields. At room temperature, TiO 2 Absorb light energy, generate hydroxyl radical·OH, superoxide ion·O on the surface 2 - , hydroperoxy·HO 2 etc. have strong redox active groups, which can directly degrade organic matter into CO 2 and H 2 Inorganic small molecules such as O. [0003] Because of its unique physical properties, magnetic particles can move rapidly under the action of an external magnetic field, and can be modified on the surfac...

AI Technical Summary

Problems solved by technology

Preparation of TiO 2 Photocatalytic thin film, which can play TiO to a certain extent 2 The photocatalytic performance of TiO can be achieved through the recycling of the film. 2 Repeated recycling, solved TiO 2 Nanoparticle materials are difficult to recycle and reuse in the field of water pollution treatment

[0005] Preparation of TiO 2 Photocatalytic thin film for efficient TiO recovery 2 particles, free from TiO 2 Particle loss, causing waste of resources, secondary pollution and other problems, but the prepared TiO 2 Photocatalytic thin films are often due to TiO 2 The reason why the particles are wrapped by the matrix resin in the film, and the TiO cannot be fully utilized 2 photocatalytic performance

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