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Carrier type titanium dioxide ultrafiltration membrane and preparation method and application thereof

A titanium dioxide and ultrafiltration membrane technology, applied in the field of environmental pollution control, can solve the problems of providing the slightest help in the process of the reaction, unfavorable to the practical application of ceramic membranes, and small catalyst loading, so as to achieve optimal operation and improve membrane pollution. , the effect of increasing the reaction rate

Active Publication Date: 2012-06-13
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the asymmetric ceramic membrane prepared by the traditional method can only provide a separation or reaction interface, and its catalyst loading is small, while the support layer and transition layer, which account for most of the volume of the ceramic membrane, only provide mechanical strength and do not Provide the slightest assistance to the progress of the reaction
After searching, it was found that the research group of Professor Paula T. Hammond of the Massachusetts Institute of Technology once wrote an article in the 2009 issue 48 of Natural Material, explaining the layer-by-layer spraying method (Layer-By-Layer Spinning Method) on the fiber membrane of nylon 66. Catalyst coating to realize the overall functionalization of organic membranes, but there is only one literature on the overall functionalization of ceramic membranes. In his work, activated alumina was loaded on the macroporous support layer. However, this kind of ceramic membrane may cause unrecoverable membrane fouling due to the accumulation of colloidal particles in the membrane during use, which is not conducive to the practical application of ceramic membranes.

Method used

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  • Carrier type titanium dioxide ultrafiltration membrane and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Preparation of supported titanium dioxide ultrafiltration membrane

[0037] (1) The alumina ceramic membrane support made in the laboratory (plate type, prepared according to the method described in Document 1, with a pore size of 2 μm and a porosity of 45%) was ultrasonically cleaned in ether, methanol and water for 15 minutes, then dried, and dried at 300 After calcination at ℃ for 4 hours, store it in a dust-free laboratory bench for future use;

[0038] (2) Add titanium dioxide into the ball mill tank, and add ethanol according to 25% of its mass, and ball mill for 24 hours. After ball milling, the particle size reaches 100-200nm, and dry at 70°C for later use;

[0039] (3) Dissolve polyvinyl alcohol in water at a ratio of 0.75 wt%, and under vigorous stirring, add 10 wt% of the titanium dioxide prepared in step (2), stir for 4 hours, and ultrasonically seal and store for 30 minutes for later use;

[0040] (4) Coating by dipping and pulling method: fix the cera...

Embodiment 2

[0050] (1) Preparation of supported titanium dioxide ultrafiltration membrane

[0051] (1) The alumina ceramic membrane support made in the laboratory (plate type, prepared according to the method described in Document 1, with a pore size of 2 μm and a porosity of 45%) was ultrasonically cleaned in ether, methanol and water for 15 minutes, then dried, and dried at 300 After calcination at ℃ for 4 hours, store it in a dust-free laboratory bench for future use;

[0052] (2) adding titanium dioxide into the ball milling tank, adding ethanol according to 25% of its mass, ball milling for 24 hours, and drying at 70°C to prepare titanium dioxide with a particle size of 100-200nm for subsequent use;

[0053] (3) Dissolve polyvinyl alcohol in water at a ratio of 0.5 wt%, and under vigorous stirring, add 8 wt% of the titanium dioxide prepared in step (2), stir for 4 hours, ultrasonicate for 30 minutes and seal and store for later use;

[0054] (4) Coating by the rotary coating method:...

Embodiment 3

[0060] (1) Preparation of supported titanium dioxide ultrafiltration membrane

[0061] (1) The alumina ceramic membrane support made in the laboratory (plate type, prepared according to the method described in Document 1, with a pore size of 2 μm and a porosity of 45%) was ultrasonically cleaned in ether, methanol and water for 15 minutes, then dried, and dried at 300 After calcination at ℃ for 4 hours, store it in a dust-free laboratory bench for future use;

[0062] (2) adding titanium dioxide into the ball milling tank, adding ethanol according to 25% of its mass, ball milling for 24 hours, and drying at 70°C to prepare titanium dioxide with a particle size of 100-200nm for subsequent use;

[0063] (3) Dissolve polyvinyl alcohol in water at a ratio of 0.5 wt%, and under vigorous stirring, add 8 wt% of the titanium dioxide prepared in step (2), stir for 4 hours, ultrasonicate for 30 minutes and seal and store for later use;

[0064] (4) Coating by centrifugal coating method...

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Abstract

The invention relates to a preparation method and applications in supported catalysts of a carrier type titanium dioxide ultrafiltration membrane. According to the preparation method, a ceramic membrane is used as the support body, the self-growing phenomenon of titanium dioxide particles at high temperature is utilized, a titanium dioxide ultrafiltration membrane layer with high flux and tortuosity is formed on the surface of the ceramic membrane support body through the interweaving of titanium dioxide nanorods and calcining, thus the tortuosity and loose degree of the membrane layer can be effectively increased; an enough space is provided for supporting catalysts on the basis of ensuring the retention capacity of the original ceramic membrane; and the overall functionalization of the ceramic membrane is realized, namely the ceramic membrane supporting of multiple catalysts is realized and the product can be used in the fields such as photocatalysis, catalytic ozonation, catalytic hydrogen peroxide oxidation and catalytic wet oxidation.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution control, and relates to a carrier-type titanium dioxide ultrafiltration membrane coated on the surface of a ceramic membrane support body, its preparation method and its loading catalyst, specifically in photocatalysis, catalytic ozonation, and catalytic hydrogen peroxide oxidation , catalytic wet oxidation and other fields of application. Background technique [0002] The ceramic membrane is mainly composed of Al 2 o 3 ,TiO 2 , ZrO 2 It is prepared by high-temperature calcination. Because of its inherent characteristics of high temperature and high pressure resistance, acid and alkali corrosion resistance, oxidation resistance, and high mechanical strength, it is widely recognized that it may be widely used in catalytic technology and water treatment technology under harsh conditions. application. However, the asymmetric ceramic membrane prepared by traditional methods can on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/10B01D71/02B01D67/00B01J32/00B01J21/06B01J23/34
Inventor 全燮朱云庆陈硕
Owner DALIAN UNIV OF TECH
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