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Graphene/clay composite material, and preparation method and application thereof

A composite material and graphene technology, applied in chemical instruments and methods, other chemical processes, adsorption water/sewage treatment, etc., can solve problems such as research and application limitations, easy agglomeration, etc., to achieve improved adsorption performance, good dispersion, and reduced small reunion effect

Active Publication Date: 2013-06-12
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the surface of graphene is in an inert state, and there is a strong van der Waals force between the sheets, which is prone to agglomeration, which limits its research and application in the field of adsorption.
[0006] From the above analysis, it can be seen that graphene has high adsorption selectivity for organic matter, but it is easy to agglomerate.

Method used

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  • Graphene/clay composite material, and preparation method and application thereof
  • Graphene/clay composite material, and preparation method and application thereof
  • Graphene/clay composite material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Add 1g of graphite powder (Tianjin Kemiou Chemical Reagent Co., Ltd.) into 25mL of 98wt% concentrated sulfuric acid, cool to 0°C in an ice-salt bath, and slowly add 2.5g of KMnO 4 , then heated up to 30°C, stirred at 20rpm for 6h, added 200mL of water after the reaction, and then added 2mL of 30wt% hydrogen peroxide to react until the solution was bright yellow, centrifuged at 600rpm, washed with water, and put the obtained solid into 200mL of water. , treatment at a frequency of 40Hz for 2h, and then treatment at a microwave power of 700W and a frequency of 2KHz for 1h to obtain graphene oxide; adding 3g of NaOH, heating in a tube furnace at 760°C for 1h under nitrogen protection to obtain porous graphene; porous graphite The specific surface area of ​​ene is 350m 2 / g, the weight loss at 900°C is 3wt%.

[0046] (2) Add 1g of the porous graphene prepared in step (1) to 100mL of ethanol (chemically pure, 99v / v%), disperse for 0.5h at an ultrasonic power of 300W, an...

Embodiment 2

[0048] (1) Add 1g of graphite powder (Tianjin Kemiou Chemical Reagent Co., Ltd.) into 25mL of 98wt% concentrated sulfuric acid, cool to 0°C in an ice-salt bath, and slowly add 3g of KMnO 4 , then heated up to 60°C, stirred at 30rpm for 5h, added 200mL of water after the reaction, and then added 3mL of 30wt% hydrogen peroxide to react until the solution was bright yellow, centrifuged at 800rpm, washed with water, and put the obtained solid into 200mL of water. 1 h at a frequency of 40 Hz, then 1.2 h at a microwave power of 700 W and a frequency of 2 KHz to obtain graphene oxide; add 4 g of KOH, and heat at 760 ° C in a tube furnace for 2 h under nitrogen protection to obtain porous graphene; porous The specific surface area of ​​graphene is 370m 2 / g, the weight loss at 900°C is 6wt%.

[0049] (2) Add 1g of the porous graphene prepared in step (1) into 100mL of water, disperse for 0.4h at an ultrasonic power of 300W and a frequency of 40Hz, then add 1g of vermiculite, heat to ...

Embodiment 3

[0051] (1) Add 1g of graphite powder (Tianjin Kemiou Chemical Reagent Co., Ltd.) into 25mL of 98wt% concentrated sulfuric acid, cool to 0°C in an ice-salt bath, and slowly add 2.5g of KMnO 4 , and then heated to 50°C, stirred at 40rpm for 4h, after the reaction was completed, 200mL of water was added, and then 2mL of 30wt% hydrogen peroxide was added to react until the solution was bright yellow. 1. Process at a frequency of 40 Hz for 2 hours, then process at a microwave power of 700 W and a frequency of 2 KHz for 1.4 hours to obtain graphene oxide, then add 5 g of NaOH, and heat in a tube furnace at 760 ° C for 1 hour under nitrogen protection to obtain porous graphene; The specific surface area of ​​porous graphene is 390m 2 / g, the weight loss at 900°C is 5wt%.

[0052] (2) Add 1 g of the porous graphene prepared in step (1) to 100 mL of acetone (chemically pure, 99%), disperse for 0.3 h at an ultrasonic power of 300 W, and a frequency of 40 Hz, then add 1 g of illite, and...

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Abstract

The invention belongs to the field of adsorbing materials, and relates to an inorganic-inorganic hybrid material, particularly a graphene / clay composite material. The composite material is powdery, is compounded from porous graphene and clay, and has a porous structure; the porous graphene is inserted among clay layers through intercalation reaction; the mass ratio of the porous graphene to the clay is 1:(0.1-10); the specific area of the graphene / clay composite material is 200-250 m<2> / g, and the weight loss within 900 DEG C is 3-6 wt%; and the clay is montmorillonite, vermiculite, illite, kaolin or rectorite. The graphene / clay composite material can be easily dispersed, can be used for comprehensively and efficiently adsorbing heavy metals and organic substances, and has the characteristics of high dispersity and efficient and selective adsorbability for heavy metals and organic substances; the maximum comprehensive removal rate can reach 99%; and thus, the invention has wide prospects in industrialized application.

Description

technical field [0001] The invention belongs to the field of adsorption materials, and relates to an inorganic-inorganic composite material, in particular to a graphene / clay composite material. Background technique [0002] With the development of society, soil, water and atmosphere are polluted by organic matter and heavy metals to varying degrees, seriously affecting the living environment and sustainable development of human beings. In the process of solving various environmental problems faced by human beings, various environmental functional materials play an indispensable role. [0003] Clay has a wide range of sources, low price, high specific surface area, and polar surface, and has the functions of environmental pollution purification, environmental restoration and environmental replacement (Xueping Wu, Wangyong Zhu, Xianlong Zhang, Tianhu Chen, Ray L Frost. Catalytic deposition of nanocarbon onto palygorskite and its absorption of phenol[J].Applied Clay Science,20...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28
Inventor 谭绍早蔡祥刘露于爱丽黄浪欢谢瑜珊
Owner JINAN UNIVERSITY
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