Separation membrane with photocatalytic performance and preparation method of separation membrane

Abstract

The invention discloses a separation membrane with photocatalytic performance and preparation method of the separation membrane by use of layer-by-layer self-assembly. According to the method, the photocatalytic separation membrane is prepared with the ultraviolet-assisted layer-by-layer self-assembly method. Firstly, TiO2 sol and a GO (graphene oxide) aqueous solution are prepared, TiO2 and GO are supported on the surface of an organic ultrafiltration base membrane in the order of TiO2-GO- layer by layer with the layer-by-layer self-assembly method, and then, the supported TiO2 and GO layersare subjected to ultraviolet radiation treatment in an ethanol solution to form a GO-TiO2 assembly.

Description

technical field [0001] The invention belongs to the field of photocatalytic material technology and membrane separation technology, and in particular relates to a method for preparing a photocatalytic performance separation membrane by layer-by-layer self-assembly. Background technique [0002] Layer-by-layer self-assembly is a simple and versatile surface modification method developed rapidly in the 1990s. It is a technology that uses substrates to alternately adsorb from two or more polymer solutions and complement each other with other multivalent substances. , regenerative medicine, tissue engineering, and bionic medicine have been recognized. In the past few decades, layer-by-layer self-assembly technology has attracted the attention of scientific researchers because of its controllable, simple, and adjustable composition. [0003] Since the discovery of semiconductor materials with photocatalytic properties, photocatalysis has been widely used to degrade organic pollu...

AI Technical Summary

Problems solved by technology

Although the photocatalytic oxidation process has achieved certain results in the treatment of organic pollutants, there are also some shortcomings, which restrict the popularization and application of this process in production

In the specific application process, due to the poor light transmittance of the suspension, low light efficiency, complex process, high cost, powder TiO 2 Catalysts are easy to be poisoned, difficult to be recovered by traditional separation methods (such as flocculation, precipitation, etc.), the reuse rate is low, and the effluent is prone to secondary pollution and other problems

In addition, most catalysts can only be excited by short-wavelength ultraviolet light, while ultraviolet light sources have defects such as high energy consumption and short life; at the same time, photogenerated electrons and holes are easy to recombine, resulting in generally low quantum efficiency of photocatalytic reactions.

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