Preparation method of high-performance composite photocatalytic material

Abstract

The invention belongs to the field of photocatalysis, and particularly relates to a preparation method of a high-performance composite photocatalytic material. The preparation method comprises the following steps: 1, adding tourmaline into distilled water, uniformly stirring to form a slurry, carrying out ball milling treatment in a ball mill, and drying to obtain tourmaline powder with uniform particle size; 2, adding polyvinyl alcohol into the tourmaline powder, carrying out solid uniform stirring so as to obtain mixed powder, adding the mixed powder into distilled water, and carrying out constant temperature stirring until complete dissolution is achieved so as to obtain a mixed dispersion liquid; step 3, uniformly coating a substrate flat plate with the mixed dispersion liquid, performing constant-temperature rapid drying, performing cooling to form a thin film layer, and repeating the step from coating to cooling for 2-6 times so as to obtain a dispersion film; 4, adding tetrabutyl titanate into absolute ethyl alcohol, uniformly stirring, adding an obtained mixed solution into a nano sprayer, and uniformly spraying the mixed solution on the surface of the constant-temperaturedispersion film to form a prefabricated film; and step 5, conveying the prefabricated membrane into a reaction kettle, carrying out constant-temperature sintering for 3-6 hours, and cooling to obtainthe composite photocatalytic material.

Description

technical field [0001] The invention belongs to the field of photocatalysis, and in particular relates to a preparation method of a high-performance composite photocatalysis material. Background technique [0002] Titanium dioxide is a photocatalyst with high efficiency, non-toxicity, stable chemical properties, strong photooxidation resistance and low price. Titanium dioxide photocatalysis / photoelectrocatalysis technology has attracted extensive attention in the application of toxic and biodegradable organic wastewater and waste gas treatment. The degradation efficiency of nano titanium dioxide is high, but the photocatalytic reaction can only be carried out under the irradiation of ultraviolet light, and the separation rate of photogenerated electrons and holes still needs to be improved. In order to improve the performance of titanium dioxide, the preparation of titanium dioxide composite materials and changing its application form have become one of the key directions o...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems in the prior art, the present invention provides a method for preparing a high-performance composite photocatalytic material, which solves the problem of difficult processing of polyaniline, and uses the polymer containing conjugated double bonds produced by the constant temperature reaction of polyvinyl alcohol to effectively It improves the electron transfer on the surface of titanium dioxide, realizes a good hole-electron dislocation reaction, and greatly improves the degradation performance of the surface photocatalytic film