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Production method of graphene/ceramic composite filter membrane

A ceramic filter membrane and ceramic composite technology, which is applied in chemical instruments and methods, membrane technology, semipermeable membrane separation, etc., can solve the problems of low binding force between graphene oxide and ceramic filter membrane, low filtration efficiency, etc., and achieve improved filtration efficiency. Separation effect, high safety and long service life

Inactive Publication Date: 2017-05-17
于有海
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the low filtration efficiency of graphene oxide modified ceramic filter membranes in the prior art and the low binding force between graphene oxide and ceramic filter membranes, thereby providing a method that can improve the performance of ceramic filter membranes. The efficiency of filtration membrane, and the preparation method of composite filtration membrane of graphene oxide and ceramic filtration binding force

Method used

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  • Production method of graphene/ceramic composite filter membrane
  • Production method of graphene/ceramic composite filter membrane
  • Production method of graphene/ceramic composite filter membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This embodiment provides a method for preparing a graphene / ceramic composite filter membrane, comprising the following steps: configuring a graphene oxide solution with a certain concentration;

[0032] The graphene oxide solution is infiltrated on the surface of the ceramic filter membrane and in the pores of the ceramic filter membrane;

[0033] Reducing the graphene oxide / ceramic filter membrane to obtain a graphene / ceramic composite filter membrane.

[0034] The preparation method of the above-mentioned graphene / ceramic composite filter membrane can infiltrate the graphene oxide solution into the micropores of the ceramic filter membrane, avoiding that in the prior art, the graphene oxide solution can only be adsorbed on the surface of the ceramic filter membrane; thus The pore size of the micropores in the ceramic membrane is reduced; the graphene oxide is reduced to graphene, so that the graphene and the ceramic filter membrane are chemically bonded together, and ...

Embodiment approach

[0053] Choose distilled water as the solvent, disperse the freeze-dried and solidified graphene oxide in the aqueous solution, configure the graphene oxide solution with a concentration of 1mg / ml, and ultrasonicate the graphene oxide solution at a power of 600W for 0.5 hours, and fully pulverize and disperse it to form homogeneous graphene oxide solution.

[0054] The graphene oxide was filled into the pores of the zirconia ceramic membrane by the filter press method. Press filter from the inside of the ceramic membrane to the outside of the ceramic membrane for 30 minutes, then press filter from the outside of the ceramic membrane to the inside of the ceramic filter membrane for 30 minutes, dry naturally, repeat the above steps twice, and obtain a graphene oxide / ceramic composite filled many times filter membrane.

[0055] Place the above-mentioned ceramic filter membrane with graphene oxide fragments embedded in the tube furnace, first exhaust the air in the quartz tube in ...

specific Embodiment approach

[0060] The difference from Example 1 is that the ceramic filter membrane filled with graphene oxide is placed in a sodium borohydride acid solution, reduced for 5 hours, and dried to obtain a graphene / ceramic composite filter membrane. The retention rate of bovine serum albumin by the graphene / zirconia ceramic composite membrane after reduction in this embodiment is 51.6%

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Abstract

The invention provides a production method of a graphene / ceramic composite filter membrane. The method comprises the following steps: preparing a graphene oxide solution with a certain concentration; allowing the graphene oxide solution to seep in the surface of a ceramic filter membrane and micropores of the ceramic filter membrane; and reducing a graphene oxide / ceramic filter membrane to obtain the graphene / ceramic composite filter membrane. The method allows the graphene oxide solution to seep in the micropores of the ceramic filter membrane, and avoids just adsorption of the graphene oxide solution to the surface of the ceramic filter membrane in the prior art, so the aperture dimension of the micropores in the ceramic membrane is reduced; graphene oxide is reduced into graphene, so grapene and the ceramic filter membrane are bonded through chemical bonds, and the phenomena of shedding of the graphene oxide and dissolution of the graphene in the solution are prevented; and the filtering performance of the graphene is bonded to the ceramic filter membrane, so the filtering separation effect and the mechanical strength of the graphene / ceramic composite filter membrane are improved.

Description

technical field [0001] The invention relates to the technical field of liquid membrane separation, in particular to a preparation method of a graphene / ceramic composite filter membrane. Background technique [0002] Water resources are the material basis for human survival. However, with the growth of the world's population and the continuous development of industrialization, the crisis of water resources faced by mankind is becoming more and more serious, especially in my country with a large population, uneven distribution of water resources, and water shortages. increasingly serious. In addition, because our country is in a stage of rapid development and the awareness of environmental protection is not strong, various pollutants are discharged directly without treatment, causing serious pollution of large areas of rivers and lakes, and directly aggravating the water resource crisis in our country. Therefore, how to efficiently utilize water resources has become the focus ...

Claims

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Application Information

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IPC IPC(8): B01D71/02B01D69/12B01D67/00C04B41/85
CPCB01D71/021B01D67/0044B01D69/12C04B41/85
Inventor 于有海闵永刚彭莉苑春秋孟冰露
Owner 于有海
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