Preparation method and application of an air-type photocatalytic reaction film

Abstract

The invention belongs to the technical field of industrial organic wastewater degradation, and specifically relates to a preparation method of an air-type photocatalytic reaction membrane, which includes the following steps: S1: Use a stainless steel wire mesh as a base material, put it into the groove of an acrylic plate, and make the base material Level with the bottom of the groove; S2 prepares the PDMS solution and the curing agent to obtain an adhesive mixture, and disperses nano titanium dioxide P25 in the Nafion solution to obtain a photocatalyst mixture; S3 slowly drops the adhesive mixture on the base material, and Carry out vacuum treatment; in S4, place the acrylic plate horizontally in the oven for baking; in S5, pour the photocatalyst mixture onto the adhesive, place the acrylic plate horizontally in the oven and continue baking to obtain an air-type photocatalytic reaction film. The membrane prepared by the method of the present invention has the advantages of high degradation efficiency, stable performance, can realize gas-liquid two-phase separation and oxygen diffusion, does not require aeration and stirring, and is low in cost.

Description

technical field [0001] The invention belongs to the technical field of industrial organic wastewater degradation, and more specifically relates to a preparation method and application of an air-type photocatalytic reaction membrane. Background technique [0002] With the continuous progress of the industrialization process of human society, a large amount of industrial wastewater is discharged into the environment, especially organic industrial wastewater. Due to the complex water quality of industrial wastewater and the increasing difficulty of treatment, it is difficult to effectively remove the pollutants only by traditional treatment methods. Therefore, nano-TiO 2 The representative photocatalytic technology came into being. [0003] Nano-TiO 2 It is a typical photocatalytic material. It has stable chemical properties, light corrosion resistance, and long-lasting sterilization and pollutant degradation effects. Its mechanism is nano-TiO 2 With a large specific surface...

AI Technical Summary

Problems solved by technology

Although TiO 2 Photocatalytic technology has achieved great theoretical and experimental results in the research of industrial wastewater degradation, but there are few results that can be applied in actual industry. One of the important reasons is that TiO 2 Difficult to immobilize

The disadvantages of suspension phase catalysis are that the catalyst is easy to deactivate and aggregate, it is difficult to separate and recover the catalyst after treatment, and the penetration depth of light is easily affected, and energy consumption is required for stirring or aeration. These problems seriously limit the development of nano-TiO. 2 With the application and development of photocatalytic technology, an effective way to overcome this shortcoming is to prepare supported photocatalysts

[0005] The Chinese utility model patent application with application number 2014105585562 discloses a preparation method and application of a highly active titanate nanosheet photocatalytic membrane material. The utility model uses the prepared titanate nanosheet photocatalytic membrane material as unsupported and transparent , flexible photocatalytic film, but about the use of nano-TiO 2 The preparation of material (P25) can realize gas-liquid two-phase separation and oxygen diffusion, and the report of air-type photocatalytic reaction membrane with short production cycle, high mechanical strength and high catalytic efficiency has not yet been reported.

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