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Ceramic membrane of loaded nanometer wire photocatalyst and preparation method thereof

A technology of photocatalyst and ceramic membrane, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. minor issues

Inactive Publication Date: 2019-05-21
殷红平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Ceramic membrane of loaded nanometer wire photocatalyst and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0034] A ceramic membrane loaded with nanoscale photocatalysts, the ceramic membrane loaded with nanoscale materials includes a ceramic membrane carrier, a catalytically active component and a modifier, the ceramic membrane carrier is an alumina membrane carrier in a hollow fiber configuration, and the diameter of the ceramic membrane carrier The thickness is 1mm, the thickness is 0.1mm, the average pore size is 50nm, and the catalytic active component is coated with SnO 2 Titanium dioxide nanoparticles, the catalytic active component is prepared from the following raw materials in parts by weight: 10 parts of nano-titanium dioxide, SnCl 4 100 parts of solution, 1 part of urea and hydrochloric acid solution, SnCl 4 The concentration of the solution is 15mmol / L.

[0035] The modifier consists of the following components in parts by weight: 10 parts of nano-zinc oxide, 60 parts of solvent and 0.5 part of triethanol, and the solvent is a mixture of acetone and ethylene glycol me...

Embodiment 2

[0043] A ceramic membrane loaded with nanoscale photocatalysts, the ceramic membrane loaded with nanoscale materials includes a ceramic membrane carrier, a catalytically active component and a modifier, the ceramic membrane carrier is a zirconia membrane carrier in a flat configuration, the diameter of the ceramic membrane carrier The thickness is 10mm, the thickness is 0.5mm, the average pore size is 100nm, and the catalytic active component is coated with SnO 2 Titanium dioxide nanoparticles, the catalytic active component is prepared from the following raw materials in parts by weight: 12 parts of nano-titanium dioxide, SnCl 4 110 parts of solution, 2 parts of urea and hydrochloric acid solution, SnCl 4 The concentration of the solution was 17mmol / L.

[0044] The modifier is composed of the following components in parts by weight: 12 parts of nano-zinc oxide, 70 parts of solvent and 0.6 part of triethanol, and the solvent is a mixture of acetone and ethylene glycol methyl ...

Embodiment 3

[0052] A ceramic membrane loaded with nanoscale photocatalysts, the ceramic membrane loaded with nanoscale materials includes a ceramic membrane carrier, a catalytically active component and a modifier, the ceramic membrane carrier is a titanium oxide membrane carrier with a single-channel tubular configuration, and the ceramic membrane carrier The diameter is 30mm, the thickness is 1.5mm, the average pore size is 300nm, and the catalytic active component is the surface coated with SnO 2 Titanium dioxide nanoparticles, the catalytic active component is prepared from the following raw materials in parts by weight: 15 parts of nano-titanium dioxide, SnCl 4 125 parts of solution, 3 parts of urea and hydrochloric acid solution, SnCl 4 The concentration of the solution is 20mmol / L.

[0053] The modifier is composed of the following components in parts by weight: 15 parts of nano-zinc oxide, 80 parts of solvent and 0.7 part of triethanol, and the solvent is a mixture of acetone and...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/14B01J35/06B01J37/02
Inventor 殷红平
Owner 殷红平
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