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Ozone-catalytic functional ceramic membrane, preparation method thereof and circulating coating device

A technology of functional ceramics and ozone catalysis, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, oxidized water/sewage treatment, etc. Low, unable to realize the integration of membrane filtration and ozone catalytic functions, etc., to achieve good effluent quality, promote the decomposition of ozone, and good degradation efficiency

Active Publication Date: 2015-08-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of the existing ceramic membranes, such as the low ozone catalytic efficiency of ceramic membranes, the inability to realize the integration of membrane filtration and ozone catalytic functions, and the inability to effectively alleviate membrane pollution, a ceramic membrane with ozone catalytic function and its preparation method and Circulation coating device

Method used

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  • Ozone-catalytic functional ceramic membrane, preparation method thereof and circulating coating device
  • Ozone-catalytic functional ceramic membrane, preparation method thereof and circulating coating device

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0051] (1) Preparation of metal-supported ceramic membrane matrix

[0052] 1) Prepare 500 mL of manganese nitrate solution with a concentration of 0.1 mol / L at a room temperature of 25°C;

[0053] 2) Immerse the selected tubular ceramic membrane in 0.1mol / L manganese nitrate aqueous solution for 4 hours, and shake it in a constant temperature shaker to ensure sufficient injection and adsorption;

[0054] 3) After taking it out, dry it at 25°C for 12 hours;

[0055] 4) Then dry at 85°C for 12 hours;

[0056] 5) Calcining at a high temperature of 550° C. for 1 h to prepare a metal manganese-loaded ceramic membrane substrate.

[0057] (2) Preparation of manganese oxide dip coating solution

[0058] Adopt equivalent reaction method of potassium permanganate and manganese chloride:

[0059] 1) At room temperature 25°C, quickly mix 180mL manganese chloride solution with a concentration of 2mmol / L and 120mL potassium permanganate solution with a concentration of 2mmol / L (requires...

specific Embodiment approach 2

[0071] The difference between this embodiment and specific embodiment 1 is that in step (1), the prepared metal-loaded ceramic membrane substrate is a metal iron-manganese composite loaded ceramic membrane substrate, and the specific steps are as follows:

[0072] (1) Preparation of metal-loaded ceramic membrane matrix

[0073] 1) At a room temperature of 25°C, prepare 500mL of a mixed solution of manganese nitrate and ferric nitrate with a total concentration of 0.1mol / L, and the molar ratio of iron and manganese is 1:1;

[0074] 2) Immerse the selected tubular ceramic membrane in a mixed aqueous solution of 0.1mol / L manganese nitrate and ferric nitrate for 4 hours, and shake it in a constant temperature shaker to ensure sufficient injection and adsorption;

[0075] 3) After taking it out, dry it at 25°C for 12 hours;

[0076] 4) Then dry at 85°C for 12 hours;

[0077] 5) Calcining at a high temperature of 550° C. for 1 h to prepare a metal iron-manganese composite loaded c...

specific Embodiment approach 3

[0078] The difference between this embodiment and specific embodiment 1 is that in step (1), the prepared metal-loaded ceramic membrane substrate is a metal iron-manganese-potassium composite loaded ceramic membrane substrate, and the specific steps are as follows:

[0079] (1) Preparation of metal-loaded ceramic membrane matrix

[0080] 1) At a room temperature of 25°C, prepare 500 mL of a mixed solution of manganese nitrate, ferric nitrate and potassium nitrate with a total concentration of 0.1 mol / L, and the molar ratio of iron, manganese and potassium is 1:1:1;

[0081]2) Immerse the selected tubular ceramic membrane in a mixed aqueous solution of 0.1mol / L manganese nitrate, ferric nitrate and potassium nitrate for 4 hours, and shake it in a constant temperature shaker to ensure sufficient injection and adsorption;

[0082] 3) After taking it out, dry it at 25°C for 12 hours;

[0083] 4) Then dry at 85°C for 12 hours;

[0084] 5) Calcining at a high temperature of 550° C...

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Abstract

The invention discloses an ozone-catalytic functional ceramic membrane, a preparation method thereof and a circulating coating device, relates to the technical field of membrane material preparation, and aims at solving the problems that the ozone-catalytic efficiency of the existing ceramic membrane is low, the integration of membrane filtration and ozone-catalytic functions cannot be realized, membrane pollution cannot be effectively relieved and the like. By using a tubular ceramic membrane as a carrier, single-component or multi-component metal oxides are loaded through an impregnation method, then manganese oxide dipping coating solution is prepared, and a catalytic coating layer is prepared on the surface of the membrane through a layer-by-layer dipping coating method. The invention aims at establishing a stereoscopic multistage catalyst system, simultaneously improving the catalytic efficiency of the separation layer and supporting layer of the ceramic membrane and enabling an ozone-catalytic effect to seep into the entire ceramic membrane to fully realize the overall catalytic effect. Compared with other metal oxides, manganese oxide has better adsorption and ozone-catalytic capacities, and while the ozone-catalytic capacity is improved, the membrane pollution is effectively relieved and the integration of multiple functions such as pollutant adsorption, ozone-catalytic oxidization and membrane separation is realized.

Description

technical field [0001] The invention relates to a functionalized ceramic membrane and its preparation and circulation coating device, and relates to the technical field of membrane material preparation. Background technique [0002] With the continuous improvement of the preparation level of membrane materials and the continuous decline of application costs, membrane technology, as a water treatment technology in the 21st century, is entering the era of large-scale application in the water treatment industry. In the process of water treatment, choosing an appropriate pretreatment technology before the membrane can significantly improve the efficiency of the membrane unit in removing pollutants, and at the same time effectively alleviate membrane fouling. Among the many pretreatment technologies, ozone pre-oxidation is considered to be a very efficient pre-membrane pretreatment technology. A large number of research and engineering practices have also proved that ozone pre-o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D67/00C02F1/44C02F1/78B01J23/34
Inventor 梁恒成小翔白朗明瞿芳术丁安
Owner HARBIN INST OF TECH
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