Method for preparing aluminum oxide/carbon aerogel composite material

A carbon aerogel and composite material technology, applied in chemical instruments and methods, chemical/physical processes, colloidal chemistry, etc., can solve the problem of few reports on alumina/carbon composite materials, and achieve low cost and high porosity. , the effect of simple preparation process

Inactive Publication Date: 2015-07-01
NORTHWEST UNIV(CN)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, there are few reports on the preparation of alumina / carbon composites

Method used

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  • Method for preparing aluminum oxide/carbon aerogel composite material
  • Method for preparing aluminum oxide/carbon aerogel composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Dissolve 10g of glucose and 6g of polyvinylpyrrolidone (K30) in 60mL of water, then add 1.5g of aluminum trichloride hexahydrate, transfer the mixture to a closed reaction kettle, and react at 200°C for 5 hours. After the reaction, a column is obtained. gel see figure 1 (a), the gel was freeze-dried and calcined at 600 °C for 5 hours under a nitrogen atmosphere to obtain alumina / carbon airgel composites. figure 2 It is the XRD pattern of the calcined alumina / carbon airgel composite material, which is amorphous alumina. Elemental analysis showed a carbon content of 88%.

Embodiment 2

[0020] Dissolve 5.5g sucrose and 0.5g polyacrylamide (Mw: 2000000~14000000) in 20mL water, then add 0.96g aluminum trichloride hexahydrate, transfer the mixture to a closed reaction kettle, and react at 200°C for 5 hours , a columnar gel was obtained after the reaction, see figure 1 (b), the gel was freeze-dried and then calcined at 1000 °C for 2 hours under a nitrogen atmosphere to obtain alumina / carbon airgel composites.

Embodiment 3

[0022] Dissolve 5g of lactose and 0.6g of polyacrylamide (Mw: 2000000~14000000) in 15mL of water, then add 0.48g of aluminum trichloride hexahydrate and 10mL of acetic acid, transfer the mixture to a closed reaction kettle, and react at 200°C After 5 hours, a cylindrical gel was obtained after the reaction was completed, and the gel was freeze-dried and then calcined at 1000° C. for 4 hours under a nitrogen atmosphere to obtain an alumina / carbon airgel composite material.

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Abstract

The invention discloses a method for preparing an aluminum oxide / carbon aerogel composite material. The method comprises the following steps: dissolving a water-soluble carbohydrate and a water-soluble high polymer in water in a closed container; adding an aluminum salt or aluminum hydroxide reacting at the temperature of 140-300 DEG C, drying, and calcining in an inert atmosphere of 300-1500 DEG C, thereby obtaining the aluminum oxide / carbon aerogel composite material. According to the method disclosed by the invention, the aluminum oxide / carbon aerogel composite material with low density and high porosity is prepared by adopting a one-pot process, the method disclosed by the invention has the advantages that the raw materials are readily available, the preparation process is simple, the cost is low and the like, and the prepared aluminum oxide / carbon aerogel composite material is light in weight and high in porosity and can be used for catalyst carriers, gas sensitive elements, solid electrolytic films and molten steel oxygen-measuring probe materials.

Description

technical field [0001] The invention relates to a method for preparing an alumina / carbon airgel composite material, and belongs to the technical field of carbon composite material preparation. Background technique [0002] Alumina (Al 2 o 3 ) is an important ceramic material, which has the advantages of high strength, corrosion resistance, oxidation resistance, and large surface area, and can be applied to absorbents, catalyst supports, and composite reinforcements. The preparation methods of nano-alumina mainly include: chemical precipitation method, sol-gel method, microemulsion method, etc., which can prepare alumina nanoparticles with small particle size and large specific surface area, but due to the strong polarity of alumina, the agglomeration is serious , affecting its catalytic performance. Using carbon materials to support nano-alumina can improve its dispersion and specific surface area, thereby improving its catalytic efficiency. [0003] At present, there ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/00
Inventor 梁元通陈奇利张立娟谢钢杨奇陈三平惠俊峰步怀天王尧宇
Owner NORTHWEST UNIV(CN)
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