A membrane electrode assembly for electrolytic ozone generator and its preparation method

Abstract

The invention relates to the technical field of ozone preparation by electrolysis, in particular to a membrane electrode assembly used in an electrolysis ozone generator and a preparation method thereof. The membrane electrode assembly includes an ion exchange assembly, and an anode catalyst membrane and a cathode catalyst membrane prepared by electrospinning which are respectively arranged on the left and right sides of the ion exchange assembly; The polytetrafluoroethylene layer and the perfluorosulfonic acid ion exchange membrane arranged on the surface of the polytetrafluoroethylene layer. The membrane electrode assembly prepared by the invention adopts the electrospinning film forming process, improves the structure and the preparation process, significantly improves the ozone generation rate, reduces the use cost, prolongs the service life, and has remarkable economic benefits.

Description

technical field [0001] The invention relates to the technical field of ozone preparation by electrolysis, in particular to a membrane electrode assembly used in an electrolysis ozone generator and a preparation method thereof. Background technique [0002] Ozone (O 3 ) As a strong oxidizing agent, because of its strong oxidizing ability, it has a strong sterilization and disinfection effect. After sterilization and disinfection, it will generate oxygen and will not cause secondary pollution. Therefore, it has received more and more attention in the fields of environmental protection and other fields. At present, ozone has been widely used in various aspects such as drinking water treatment, medical water treatment, urban sewage treatment, food disinfection and sterilization, and air purification. However, since ozone is easy to self-decompose and not easy to store, it is generally produced and used immediately when using ozone. At present, the methods for artificially gene...

AI Technical Summary

Problems solved by technology

The ion exchange method is to deposit a layer of electrode catalyst particles on both sides of the ion exchange membrane, but the particles exchanged by this method are relatively coarse, and the precipitation of the electrode catalyst is not easy to control

The electrochemical deposition method is to use electrochemical reduction to deposit the metal salt solution on the surface of the film, but the cost of this method is high, and the equipment used is expensive.

In addition, these methods have insufficient fastness and small specific surface area of ​​the catalyst on the ion exchange membrane, which is not conducive to improving the rate of ozone production.

[0005] In addition, the process of preparing membrane electrode assemblies in the prior art is complicated, there are many parts, bolts and other assembly are required, and the efficiency is low

At the same time, when bolts are used for assembly, since the bolts are usually made of iron, and ozone has strong oxidizing properties, it will have a certain corrosion effect on the bolts.

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