Preparation method of photocatalytic composite ceramic membrane

Abstract

The invention is applicable to the technical field of ceramic membrane preparation, and provides a preparation method of a photocatalytic composite ceramic membrane. The method comprises the followingsteps: mixing ethylenediamine, boric acid, thiourea and tetrabutyl titanate sol to prepare a composite precursor; dropwise adding absolute ethyl alcohol and glacial acetic acid into the obtained composite precursor, uniformly mixing and stirring, and carrying out wet ball milling to obtain faint yellow titanium dioxide transparent sol; adding a liquid glass solution into the titanium dioxide transparent sol for dipping, wherein the dipping time is 30-50 minutes; coating a flat plate support body with the the impregnated titanium dioxide sol; placing the coated flat plate supporting body in aroom temperature environment with the humidity smaller than 40% to be stored for 12-24 h; taking out the flat plate support body, roasting in a muffle furnace by taking nitrogen as a protective gas, heating to 500 DEG C at a speed of 2-5 DEG C / min, and keeping the constant temperature for 2-8 hours; and taking out the flat plate support body from the muffle furnace, and naturally cooling to room temperature to obtain the photocatalytic composite ceramic membrane.

Description

technical field [0001] The invention belongs to the technical field of ceramic film preparation, and in particular relates to a preparation method of a photocatalytic composite ceramic film. Background technique [0002] Inorganic ceramic ultrafiltration membranes are sintered from ceramic raw materials, so compared with organic membranes, they have better high temperature resistance, chemical corrosion resistance, higher mechanical strength, stronger oxidation resistance and easy cleaning. . With the continuous reduction of costs, inorganic ceramic membranes have been gradually promoted and used in water treatment applications, and partially replaced organic membranes in some drinking water and urban sewage treatment plants at home and abroad. The use of ceramic membranes in the treatment of landfill leachate can give full play to the advantages of chemical corrosion resistance and easy cleaning. [0003] However, due to the high COD and high turbidity of landfill leachat...

AI Technical Summary

Problems solved by technology

[0003] However, due to the high COD and high turbidity of landfill leachate, when membrane separation technology is used to treat landfill leachate, problems such as membrane fouling and concentration polarization lead to a decrease in membrane flux and shortened membrane service life. The main application bottleneck when leachate

Images