Method for preparing graphene oxide base porous film by using metal hydroxide nanowires and graphene oxide, and application of graphene oxide base porous film

A porous film and graphene technology, applied in chemical instruments and methods, copper oxide/copper hydroxide, membrane technology, etc., can solve the problems of low separation efficiency and difficulty of graphene oxide film, achieve superior mechanical properties, good The effect of separation efficiency

Inactive Publication Date: 2012-12-12
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the separation efficiency of pure graphene oxide membranes is very low, and it is difficult to be used in actual production activities. Therefore, it is necessary to find a separation performance similar to that of graphene oxide nano-separation membranes, while having good separation efficiency. porous separation membrane

Method used

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  • Method for preparing graphene oxide base porous film by using metal hydroxide nanowires and graphene oxide, and application of graphene oxide base porous film
  • Method for preparing graphene oxide base porous film by using metal hydroxide nanowires and graphene oxide, and application of graphene oxide base porous film
  • Method for preparing graphene oxide base porous film by using metal hydroxide nanowires and graphene oxide, and application of graphene oxide base porous film

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Experimental program
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Effect test

Embodiment 1

[0060] 1) Ultrasonic dispersion of graphene oxide to obtain a graphene oxide dispersion with a mass percentage concentration of 0.005%, for use;

[0061] 2) The same volume of 4 mM copper nitrate aqueous solution and 1.4 mM ethanolamine aqueous solution were mixed evenly under magnetic stirring, and then stood for 1 day to generate Cu(OH) 2 nanowire solution;

[0062] 3) The graphene oxide dispersion with a mass percent concentration of 0.005% and Cu(OH) 2 Nanowire solution, mixed according to the volume ratio of 3:1, mixed for 5 minutes under magnetic stirring to generate GO-Cu(OH) 2 nanowire floc suspension; the GO-Cu(OH) 2 The nanowire flocculent suspension was vacuum-filtered through a polycarbonate porous membrane, and a layer of 0.7 micron thick GO-Cu(OH) was formed on the polycarbonate porous membrane. 2 porous film, the GO-Cu(OH) 2 The pore size of the porous film is 6 nanometers;

[0063] 4) Treat GO-Cu(OH) with 1 mM acid solution 2 A porous film is obtained t...

Embodiment 2

[0065] 1) Ultrasonic dispersion of graphene oxide to obtain a graphene oxide dispersion with a mass percent concentration of 0.1%, for use;

[0066] 2) The same volume of 4 mM copper nitrate aqueous solution and 1.4 mM ethanolamine aqueous solution were mixed evenly under magnetic stirring, and then stood for 1 day to generate Cu(OH) 2 nanowire solution;

[0067] 3) The graphene oxide dispersion liquid with a mass percent concentration of 0.1% and Cu(OH) 2 Nanowire solution, mixed according to the volume ratio of 3:20, mixed for 5 minutes under magnetic stirring to generate GO-Cu(OH) 2 nanowire floc suspension; the GO-Cu(OH) 2 The nanowire floc suspension was vacuum-filtered through a polycarbonate porous membrane to form a layer of 2.5 micron thick GO-Cu(OH) on the polycarbonate porous membrane. 2 porous film, the GO-Cu(OH) 2 The pore size of the porous film is 8 nanometers;

[0068] 4) Treat GO-Cu(OH) with hydrazine hydrate solution at a molar concentration of 1 mM 2...

Embodiment 3

[0070] 1) Ultrasonic dispersion of graphene oxide to obtain a graphene oxide dispersion with a mass percentage concentration of 0.02%, for use;

[0071] 2) The same volume of 4 mM copper nitrate aqueous solution and 1.4 mM ethanolamine aqueous solution were mixed evenly under magnetic stirring, and then stood for 2 days to generate Cu(OH) 2 nanowire solution;

[0072] 3) The graphene oxide dispersion with a mass percent concentration of 0.02% and Cu(OH) 2 Nanowire solution, mixed according to the volume ratio of 3:10, mixed for 30 minutes under magnetic stirring to generate GO-Cu(OH) 2 nanowire floc suspension; the GO-Cu(OH) 2 The nanowire flocculent suspension was vacuum-filtered through a polycarbonate porous membrane, and a layer of GO-Cu(OH) with a thickness of 2 microns was formed on the polycarbonate porous membrane. 2 porous film, the GO-Cu(OH) 2 The porous film has a pore size of 8 nanometers;

[0073]4) Treat GO-Cu(OH) with 1 M acid solution 2 A porous film is...

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Abstract

The present invention discloses a method for preparing a graphene oxide base porous film by using metal hydroxide nanowires and graphene oxide, and an application of the graphene oxide base porous film. According to the present invention, a chemical oxidation ultrasonic dispersion method is adopted to prepare a diluent negatively charged graphene oxide (GO) dispersion liquid with a content of 0.01-0.05%; the GO dispersion liquid is mixed with a positively charged metal hydroxide nanowire solution with a concentration of 0.15-1.2 mM, wherein the diameter is nanometer scale, and the length is micrometer scale; stirring is performed for 5-30 minutes; vacuum suction filtration (negative pressure of 50-85 kPa) is performed on a polycarbonate porous film; a hydrazine hydrate treatment is performed for 5-60 minutes; and an acid (HCl, H2SO4, HNO3) or a complexing agent ethylenediamine tetra acetic acid (EDTA) is adopted to remove the metal hydroxide nanowires to obtain a nanometer GO porous separation film formed by the left pores through removing the nanowires, wherein molecules with a molecular weight of about 350 daltons can be effectively separated with the separation film. The graphene oxide base porous film prepared by the method of the present invention has a separation performance similar to a nanometer graphene oxide separation film, and further is a porous separation film with good separation efficiency.

Description

technical field [0001] The invention relates to a method and application of a graphene oxide-based porous film prepared by metal hydroxide nanowires and graphene oxide. Background technique [0002] Graphene oxide has great potential application value in separation materials due to its superior mechanical properties, chemical stability, macroscopic two-dimensional structure with single atomic layer thickness, and large-scale and cheap chemical preparation. However, the separation efficiency of pure graphene oxide membranes is very low, and it is difficult to be used in actual production activities. Therefore, it is necessary to find a separation performance similar to that of graphene oxide nano-separation membranes, while having good separation efficiency. porous separation membrane. Using the Coulomb interaction, the method of adding nanometer-sized metal hydroxide nanowires with a small diameter between the negatively charged graphene oxide sheets is used to prepare grap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D67/00C01G3/02
Inventor 彭新生黄虎彪
Owner ZHEJIANG UNIV
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