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A kind of preparation method of activated carbon fiber/graphene tube composite material

A technology of activated carbon fibers and graphene tubes, applied in chemical instruments and methods, alkali metal compounds, water/sewage treatment, etc., can solve the problems of harsh experimental conditions and high cost, and achieve excellent adsorption performance

Active Publication Date: 2021-03-30
CHANGSHA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Publication number CN102586869 discloses a method for preparing a three-dimensional graphene tube, but this method requires high-temperature chemical vapor deposition, and finally requires strong acid for etching. The experimental conditions of this method are harsh and the cost is high
However, there is no relevant research report on the preparation of activated carbon fiber / graphene tubes under low temperature conditions.

Method used

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  • A kind of preparation method of activated carbon fiber/graphene tube composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Graphene oxide was prepared by the improved Hummers method. That is: add H 2 SO 4 / H 3 PO 4 (360mL:40mL) 9:1 mixture to 3.0g graphite and 18.0g KMnO 4 In the mixture, a small amount of heat is generated to raise the temperature to 35-40°C. Then heated to 50 ° C, stirring the reaction for 12h. The reaction solution was cooled to room temperature, and a certain amount of ice water and 30% H 2 o 2 , making the solution bright yellow. Then, it was washed with 5% HCl solution and deionized water until no sulfate group was detected in the filtrate.

[0020] (2) Centrifuge the dispersion obtained in (1), remove the unoxidized graphite in the lower part, and keep the supernatant. That is, a graphene oxide solution is obtained.

[0021] (3) The graphene oxide solution prepared in (2) was diluted with deionized water to a concentration of 5 mg / mL and ultrasonicated for 6 hours at a frequency of 100 KHz and a power of 800 W to obtain the desired graphene oxide soluti...

Embodiment 2

[0025] (1) Graphene oxide was prepared by the improved Hummers method. That is: add H 2 SO 4 / H 3 PO 4 (360mL:40mL) 9:1 mixture to 3.0g graphite and 18.0g KMnO 4 In the mixture, a small amount of heat is generated to raise the temperature to 35-40°C. Then heated to 50 ° C, stirring the reaction for 12h. The reaction solution was cooled to room temperature, and a certain amount of ice water and 30% H 2 o 2 , making the solution bright yellow. Then, it was washed with 5% HCl solution and deionized water until no sulfate group was detected in the filtrate.

[0026] (2) Centrifuge the dispersion obtained in (1), remove the unoxidized graphite in the lower part, and keep the supernatant. That is, a graphene oxide solution is obtained.

[0027] (3) The graphene oxide solution prepared in (2) was diluted with deionized water to a concentration of 3 mg / mL and ultrasonicated for 4 hours at a frequency of 100 KHz and a power of 800 W to obtain the desired graphene oxide soluti...

Embodiment 3

[0031] (1) Graphene oxide was prepared by the improved Hummers method. That is: add H 2 SO 4 / H 3 PO 4 (360mL:40mL) 9:1 mixture to 3.0g graphite and 18.0g KMnO 4 In the mixture, a small amount of heat is generated to raise the temperature to 35-40°C. Then heated to 50 ° C, stirring the reaction for 12h. The reaction solution was cooled to room temperature, and a certain amount of ice water and 30% H 2 o 2 , making the solution bright yellow. Then, it was washed with 5% HCl solution and deionized water until no sulfate group was detected in the filtrate.

[0032] (2) Centrifuge the dispersion obtained in (1), remove the unoxidized graphite in the lower part, and keep the supernatant. That is, a graphene oxide solution is obtained.

[0033] (3) The graphene oxide solution prepared in (2) was diluted with deionized water to a concentration of 8 mg / mL and ultrasonicated for 8 hours at a frequency of 100 KHz and a power of 800 W to obtain the desired graphene oxide soluti...

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Abstract

The invention provides a preparation method of an activated carbon fiber / graphene tube composite. The preparation method comprises the steps of preparing a graphene oxide solution by an improved Hummers method, performing powerful ultrasound treatment on graphene oxide, soaking an activated carbon fiber in concentrated nitric acid for ultrasound treatment to form a pretreated activated carbon fiber, soaking the pretreated activated carbon fiber in the graphene oxide solution for ultrasound treatment or vibration, self-assembling graphene oxide on the surface of the activated carbon fiber to form a graphene tube, and at last, performing drying to form the activated carbon fiber / graphene tube composite, wherein the diameter of the graphene tube is 10-50 nm; and the specific surface area of the activated carbon fiber / graphene tube composite reaches 1200-1500m <2> / g. The activated carbon fiber / graphene tube composite has excellent adsorbability for persistent organic pollutants. The methodis simple, practicable, safe and environmentally friendly and has a high application value.

Description

[0001] Technical field [0002] The invention relates to the technical field of nanocomposite materials, in particular to an activated carbon fiber / graphene tube composite material and a preparation method thereof. Background technique [0003] Persistent organic pollutants are toxic and refractory organic substances with strong chemical stability and carcinogenic, teratogenic and mutagenic effects. It directly endangers human health, and seriously damages water bodies, soil and ecological environment, causing unimaginable consequences. The adsorption method has the advantages of low cost, simple operation and fast speed, and is considered to be an effective method for treating persistent organic pollutants in water bodies. The performance of the adsorbent in the adsorption method is the most critical. Therefore, the development of high-efficiency adsorbents has become a research hotspot in this field. [0004] Activated carbon fiber has a high specific surface area and is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/30
CPCB01J20/20B01J20/205B01J20/28007B01J20/28066C02F1/283C02F2101/30
Inventor 王丽平杨珊罗琨雷敏庞娅
Owner CHANGSHA UNIVERSITY
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