Ceramic membrane of loaded nanometer wire photocatalyst and preparation method thereof

Abstract

The invention discloses a ceramic membrane of a loaded nanometer wire photocatalyst and a preparation method thereof. The ceramic membrane comprises a ceramic membrane carrier, a catalytic active component and a modifying agent. The preparation method of the ceramic membrane comprises the steps of preprocessing of the ceramic membrane carrier, preparing the modifying agent, modifying the ceramic membrane carrier, preparing the catalytic active component, loading the catalytic active component to the modified ceramic membrane carrier, and obtaining the nanometer material loaded ceramic membrane; utilizing the obtained nanometer material loaded ceramic membrane for performing a photocatalytic degradation experiment on Rhodamine B, wherein the degrading rate for Rhodamine B is 98.6% or more,and the recycling rate is 90% or more. Experiment results show that the catalytic active component is loaded on the modified ceramic membrane carrier, the purpose of separating and recycling the catalytic active component is achieved, and due to loading, the catalytic performance of the catalytic active component is correspondingly improved.

Description

technical field [0001] The invention relates to the field of inorganic ceramic membranes, in particular to a ceramic membrane loaded with nano-scale photocatalyst and a preparation method thereof. Background technique [0002] Nano-photocatalyst is the nemesis of pollutants. Its mechanism of action is simply: nano-photocatalyst is excited to generate "electron-hole" pairs under the irradiation of light of a specific wavelength. This "electron-hole" pair and the surrounding water , After the oxygen acts, it has a strong oxidation-reduction ability, which can directly decompose organic dyes, formaldehyde, benzene and other pollutants in the water into harmless and tasteless substances, so as to achieve the purpose of eliminating pollutants in the water. However, due to the small particle size of nano photocatalysts, it is difficult to separate and recover solids and liquids, resulting in increased processing costs, which is limited in practical applications. [0003] In order...

AI Technical Summary

Problems solved by technology

However, due to the small particle size of nano-photocatalysts, it is difficult to separate and recover solids and liquids, resulting in increased processing costs, which are limited in practical applications.

[0003] In order to solve the problem of separation and recovery of nano-photocatalysts, researchers have attempted to load nano-photocatalysts on various supports, such as carbon, ceramic membranes, silica, hydroxyapatite, molecular sieves, organic frameworks, etc. Among these supports, With its unique advantages, namely, excellent chemical stability, good mechanical strength and long life, ceramic membranes are the preferred carrier. However, when nano photocatalysts are loaded on ceramic membranes, there are some problems, such as : The loading amount of nano photocatalyst in the ceramic membrane per unit volume is less; the binding force between nano photocatalyst and ceramic membrane is weak, etc.

Therefore, it is still a challenge to fabricate high-performance ceramic membranes loaded with nanophotocatalysts.

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