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Preparation method of graphene oxide separation membrane with adsorption function, and product prepared therethrough

A graphene and separation membrane technology, applied in the field of graphene oxide separation membrane preparation, can solve the problems of unstable adsorption performance, difficult recovery, secondary pollution, etc., and achieve the effect of excellent product performance, low cost and high separation performance

Active Publication Date: 2019-12-13
JINGDEZHEN CERAMIC INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at this stage, because the commonly used adsorbents are generally in the form of powder dispersion, they generally have many disadvantages such as difficult recovery, easy to cause secondary pollution, and unstable adsorption performance.

Method used

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  • Preparation method of graphene oxide separation membrane with adsorption function, and product prepared therethrough
  • Preparation method of graphene oxide separation membrane with adsorption function, and product prepared therethrough
  • Preparation method of graphene oxide separation membrane with adsorption function, and product prepared therethrough

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Adopt Hummers method to prepare graphene oxide, under the centrifugation speed of 5000 rpm, centrifuge the reaction product solution for 20 minutes, measure the reaction product solution 200 milliliters, drop ammonia solution thereinto until precipitation is formed, then mix The pH value of the solution is 8. After the above precipitate was filtered, separated, cleaned and dried, a mixed precipitate of nanometer hydrated manganese oxide and graphene oxide was obtained; an appropriate amount of the above mixture precipitate was weighed and ultrasonically dispersed into water to obtain a film-making slurry with a solid content of 5 wt%. The membrane-making slurry, combined with the spin coating method, prepares a graphene oxide separation membrane containing nanometer hydrated manganese oxide on an alumina porous ceramic support with an average pore diameter of 150 nanometers; the membrane is treated at 100 ° C for 2 hours, that is Corresponding film products with a thick...

Embodiment 2

[0028] Adopt Hummers method to prepare graphene oxide, under the centrifugation speed of 8000 rpm, centrifuge the reaction product solution for 10 minutes, measure 200 milliliters of the reaction product solution, drop ammonia solution thereinto until the precipitation is formed, then mix The pH value of the liquid is 7; after the above precipitate is filtered, separated, washed and dried, a mixed precipitate of nano-manganese hydrated manganese oxide and graphene oxide is obtained; an appropriate amount of the above-mentioned precipitate of the mixture is ultrasonically dispersed in water to obtain a solid content of 2 wt%. Membrane-making slurry; using the membrane-making slurry, combined with a spin-coating method, on a zirconia porous ceramic support with an average pore diameter of 100 nanometers, a graphene oxide separation membrane containing nanometer hydrated manganese oxide is prepared; the membrane is heated at 150°C The corresponding membrane product with a thicknes...

Embodiment 3

[0031] Adopt Hummers method to prepare graphene oxide, under the centrifugal speed of 6000 r / min, centrifuge the reaction product solution for 15 minutes, measure 200 milliliters of the reaction product solution, drop ammonia solution thereinto until the precipitation is formed, then mix The pH value of the solution is 6. After the above precipitate was filtered, separated, cleaned and dried, a mixed precipitate of nanometer hydrated manganese oxide and graphene oxide was obtained; an appropriate amount of the above precipitate was weighed and ultrasonically dispersed into water to obtain a film-making slurry with a solid content of 3 wt%. The membrane-making slurry, combined with the spin coating method, is prepared on a polytetrafluoroethylene membrane support with an average pore size of 200 nanometers, and a graphene oxide separation membrane containing nano-hydrated manganese oxide is prepared; the membrane is treated at 100 ° C for 2 hours , the corresponding membrane pr...

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Abstract

The invention discloses a preparation method of a graphene oxide separation membrane with an adsorption function, and a product prepared therethrough. The method comprises the following steps: centrifuging a reaction generated liquid used as a synthesis precursor, obtained after Hummers technique preparation of grpahene oxide, adjusting the pH value of the centrifuged liquid to obtain a precipitate, and performing filtration separation, washing and drying processes to obtain a mixed precipitate of nanometer hydrated manganese oxide and graphene oxide; ultrasonically dispersing the mixed precipitate in water to obtain a membrane preparation slurry; and performing a certain membrane production process on the slurry to prepare the graphene oxide separation membrane product with the adsorptionfunction, on a porous inorganic or organic carrier. The method has the advantages of greenness, environment friendliness, low cost, simple technique, excellent product performances and wide market prospect.

Description

technical field [0001] The invention belongs to the technical field of preparation of separation membrane materials, and in particular relates to a method for preparing a graphene oxide separation membrane with an adsorption function and a product thereof. Background technique [0002] At present, membrane water treatment technology has many advantages such as simple device, easy operation and control, high separation efficiency, and no secondary pollution. It has been widely used in the field of separation and purification, especially in the recovery and treatment of various types of polluted wastewater. . At this stage, as the country pays more and more attention to water environment protection, many industries have higher and higher requirements for wastewater treatment precision. The efficient removal of various ions or small molecular organic pollutants in water has become an increasingly urgent task. technical tasks. At present, for the removal of the above-mentioned...

Claims

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Application Information

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IPC IPC(8): B01D71/02B01J20/20B01J20/30C02F1/28C02F1/44
CPCB01D71/021B01J20/20C02F1/281C02F1/44
Inventor 胡学兵刘鑫张怀涛张清于云汪永清
Owner JINGDEZHEN CERAMIC INSTITUTE
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