Preparation method of porous-ceramic-supported graphene film

A graphene film and porous ceramic technology, applied in the field of graphene film preparation, can solve problems such as inability to use, and achieve the effects of low mass transfer resistance, simple and economical process, and wide application range

Active Publication Date: 2014-03-05
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, self-supporting films using graphene to form fi

Method used

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  • Preparation method of porous-ceramic-supported graphene film

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Experimental program
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Embodiment 1

[0020] 1) Mix γ-chloropropyltrimethoxysilane and toluene at a ratio of 3:40 to prepare a silane modification solution.

[0021] 2) The flake TiO with an average pore size of 50nm 2 The support body was placed in the modification solution and treated at 80°C for 2 hours. The support body was taken out from the modification solution, put into an oven, and treated at 110° C. for 4 hours.

[0022] 3) Weigh 0.15g of hydroxylated graphene, add 50mL of deionized water, stir for 5 hours, and then perform ultrasonication for 5 minutes until the hydroxylated graphene is completely dispersed in water;

[0023] 4) Coating the coating liquid on the outside of the inorganic ceramic support by the dip coating method, and the coating time is 40 seconds. After coating, the film was treated in an oven at a temperature of 70°C for 1 day.

[0024] 5) Repeat the film coating and drying process of 4) twice to obtain an organic-inorganic composite film of graphene material.

[0025] Measure the ...

Embodiment 2

[0027] 1) Mix γ-chloropropyltrimethoxysilane and absolute ethanol at a ratio of 2:40 to prepare a silane modification solution.

[0028] 2) The average pore size is 200nm tube type is Al 2 o 3 / ZrO 2 The support body was placed in the modification solution and treated at 90°C for 3 hours. The support body was taken out from the modification solution, put into an oven, and treated at 120° C. for 2 hours.

[0029] 3) Weigh 0.01g carboxylated graphene, add 50mL DMSO, stir for 8 hours, and then perform ultrasonication for 15 minutes until carboxylated graphene is completely dispersed in DMSO;

[0030] 4) Coating the coating liquid on the outside of the inorganic ceramic support by the dip coating method, and the coating time is 60 seconds. After coating, the film was treated in an oven at a temperature of 60°C for 2 days. An organic-inorganic composite film of a graphene material is obtained.

[0031] Measure the pervaporation separation performance of the composite membrane...

Embodiment 3

[0033] 1) Mix γ-chloropropyltrimethoxysilane and xylene at a ratio of 2:40 to prepare a silane modification solution.

[0034] 2) Tubular Al with an average pore diameter of 400nm 2 o 3 / ZrO 2 The support body was placed in the modification solution and treated at 80°C for 4 hours. The support body was taken out from the modification solution, put into an oven, and treated at 110° C. for 3 hours.

[0035] 3) Weigh 0.15g of mercaptographene, add 50mL of deionized water, stir for 7 hours, and then perform ultrasonication for 5 minutes until the mercaptographene is completely dispersed in deionized water;

[0036] 4) Coating the coating liquid on the outside of the inorganic ceramic support by the dip coating method, and the coating time is 50 seconds. After coating, the film was treated in an oven at a temperature of 70°C for 1 day.

[0037] 5) Repeat the coating and drying process of 4) three times to obtain an organic-inorganic composite film of graphene material. Measur...

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Abstract

The invention relates to a preparation method of a porous-ceramic-supported graphene film. An inorganic ceramic material serves as a support body, and one side of a silane-modified inorganic ceramic support body is coated with a graphene film-forming material. The preparation method can be applied to removal of water in an organic solvent through a pervaporation method and separation of organic systems in other fields of industrial production. A composite film has the unique properties of a graphene material and the own advantages of a ceramic material. The inherent limitations of common organic and inorganic materials are overcome. The preparation method is simple and economic in process, and wide in application range.

Description

technical field [0001] The invention relates to a preparation method of a graphene membrane supported by porous ceramics, and the prepared membrane can be applied to remove water in an organic solvent by a pervaporation method. Background technique [0002] In the fields of petrochemical, fine chemical, pharmaceutical chemical, and fuel ethanol production, the preparation of anhydrous organic solvents is a problem. For organic solvents that can form azeotropic equilibrium with water, the traditional techniques are azeotropic distillation, extractive distillation or molecular sieve adsorption to remove the water, but these processes have the disadvantages of high energy consumption and serious pollution. Pervaporation is a new type of liquid mixture separation technology, which is driven by the partial pressure difference of the component vapor, and uses the difference in the dissolution and diffusion speed of the components through the dense membrane to realize the separatio...

Claims

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Application Information

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IPC IPC(8): B01D71/02B01D69/10B01D67/00
Inventor 金万勤娄玥芸刘公平
Owner NANJING UNIV OF TECH
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