A ceramic ultrafiltration membrane with high-efficiency photocatalytic function and preparation method thereof

A ceramic ultrafiltration membrane and photocatalytic technology, applied in chemical instruments and methods, physical/chemical process catalysts, membranes, etc., can solve the problems of limited catalytic effect, poor penetration, easy absorption, etc., to improve the catalytic stroke and time, avoiding deactivation problems, and improving catalytic efficiency

Active Publication Date: 2022-02-22
海加尔(厦门)科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the nano-titanium oxide will lose its catalytic activity after sintering at high temperature again
Therefore, it is usually directly added to the sewage to be treated in the form of powder, which is easy to lose
Or use an organic binder to bond nano-titanium oxide in filter screens, diatom mud, etc., its catalytic ability will be blocked by the organic binder, and the catalytic ability will decrease. It is firstly degraded by catalysis, which leads to the shedding of nano-titanium oxide
At the same time, the catalytic ability of nano-titanium oxide requires high-frequency ultraviolet light, usually with a wavelength below 385nm, which limits its catalytic effect in practical applications, because high-frequency ultraviolet light has poor penetration and is easily absorbed

Method used

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  • A ceramic ultrafiltration membrane with high-efficiency photocatalytic function and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A method for preparing a ceramic ultrafiltration membrane with high-efficiency photocatalytic function, comprising the steps of:

[0039] The first step, according to the number of parts by mass, 100 parts of high-purity quartz powder with a particle size of 20um and a purity higher than 99.5%, 15 parts of high-purity quartz powder with a particle size of 0.3um and a purity higher than 99.5%, 5 parts The binder, 2 parts of lubricant and 20 parts of water are stirred evenly together, extruded or molded into a tubular or flat green body and dried.

[0040] The second step is to put the dried green body into a kiln and sinter it into a high-purity quartz porous support with a certain strength. The sintering temperature is 1600°C and the sintering time is 50 hours.

[0041] The third step is to uniformly mix 15 parts of high-purity quartz powder with a particle size of 0.1um and a purity higher than 99.5%, 2 parts of binder, 3 parts of film-forming agent, and 100 parts of w...

Embodiment 2

[0049] A method for preparing a ceramic ultrafiltration membrane with high-efficiency photocatalytic function, comprising the steps of:

[0050] The first step, according to the number of parts by mass, 100 parts of high-purity alumina powder with a particle size of 50um and a purity higher than 99.9%, 30 parts of high-purity alumina powder with a particle size of 1.5um and a purity higher than 99.5%, 6 parts of binder, 3 parts of lubricant and 20 parts of water are stirred evenly together, extruded or molded into a tubular or flat green body and dried.

[0051] The second step is to put the dried green body into a kiln and sinter it into a high-purity quartz porous support with a certain strength. The sintering temperature is 1600°C and the sintering time is 80h.

[0052] The third step is to uniformly mix 10 parts of high-purity alumina powder with a particle size of 0.5um and a purity higher than 99.5%, 3 parts of binder, 3 parts of film-forming agent, and 100 parts of wate...

Embodiment 3

[0060] A method for preparing a ceramic ultrafiltration membrane with high-efficiency photocatalytic function, comprising the steps of:

[0061] The first step, according to the number of parts by mass, 100 parts of high-purity quartz powder with a particle size of 100um and a purity higher than 99.5%, 20 parts of high-purity quartz powder with a particle size of 3um and a purity higher than 99.5%, 8 parts of viscose The binder, 2 parts of lubricant and 22 parts of water are stirred evenly together, extruded or molded into a tubular or flat green body and dried.

[0062] The second step is to put the dried green body into a kiln and sinter it into a high-purity quartz porous support with a certain strength. The sintering temperature is 1750°C and the sintering time is 55 hours.

[0063] In the third step, 12 parts of high-purity quartz powder with a particle size of 1 um and a purity higher than 99.5%, 2 parts of a binder, 4 parts of a film-forming agent, and 100 parts of wate...

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Abstract

The invention discloses a ceramic ultrafiltration membrane with high-efficiency photocatalytic function and a preparation method thereof. The matrix powder, 2-6 parts of binder, 1-3 parts of lubricant and 15-30 parts of water are stirred together and formed into a green body and dried; S2, sintering the green body into a porous support body; S3 1. Dipping and coating the coating solution on the inner or outer surface of the porous support and drying and sintering to form a transition coating; S4. Dip-coating the outer surface of the porous support transition coating and the side without the transition coating respectively with nano-titanium sol The coating solution and the nano-titanium sol coating solution diluted by 1 to 5 times are dried to obtain a ceramic film substrate; S5, put the ceramic film substrate in a reaction kettle for hydrothermal reaction, and soak it in an alkaline solution after completion Washing to prepare a ceramic ultrafiltration membrane with high-efficiency photocatalytic function. The ceramic ultrafiltration membrane prepared by the method of the invention has good catalytic effect.

Description

technical field [0001] The invention belongs to the technical field of ceramic membrane separation, and in particular relates to a ceramic ultrafiltration membrane with high-efficiency photocatalytic function and a preparation method thereof. Background technique [0002] Ceramic membrane separation has been widely used in the field of special sewage separation containing oil, organic solvent, acid and alkali, and complex organic matter, MBR water treatment field, high temperature dust removal, tail gas catalysis and other air purification fields. The ceramic membrane has the characteristics of acid and alkali resistance, organic solvent resistance, long life and stable water output. [0003] However, the disadvantage of the application of ceramic membranes in the field of sewage treatment is that the interception rate of COD other than oil is not high, usually only 10-30%, and there is basically no interception rate for ammonia nitrogen. In air purification, it does not ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/02B01D67/00B01D69/02B01J21/06B01J35/10
CPCB01D71/02B01D71/024B01D71/025B01D69/02B01D67/0041B01D67/0076B01D67/0039B01J21/063B01J35/004B01J35/10B01D2325/10
Inventor 翁志龙俞静磊
Owner 海加尔(厦门)科技有限公司
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