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Application method of graphene sponge

A technology of graphene sponge and application method, which is applied in the application field of graphene sponge, can solve the problems of insufficient adsorption capacity, high cost, and difficulty in preparing large quantities of large pieces, and achieve fast adsorption speed, low cost, and wide application potential Effect

Inactive Publication Date: 2012-06-20
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nano- and micro-scale porous materials and nanowire films have the disadvantages of insufficient adsorption capacity, high cost, and difficulty in large-scale preparation.

Method used

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  • Application method of graphene sponge
  • Application method of graphene sponge
  • Application method of graphene sponge

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0017] The preparation method of graphene sponge among the present invention is as follows:

[0018] In the first step, measure 35ml of graphene oxide dispersion with a concentration of 2mg / ml, and add 1ml of ammonia water to form a mixed solution; the concentration of ammonia water is 30%, which means that every 100 grams of ammonia water contains 30 grams of hydrogen peroxide.

[0019] In the second step, pour the mixed solution into the reaction kettle, heat it at 180°C for 24 hours, then cool it naturally, and unscrew the reaction kettle to obtain the graphene gel.

[0020] In the third step, the obtained graphene gel is freeze-dried at low pressure to obtain a porous graphene sponge.

[0021] The organic solvent or grease includes vegetable oil, crude oil, pump oil, dodecane, n-decane, octane, hexane, phenol, nitrobenzene, chloroform, dichlorobenzene, ethylbenzene, toluene, benzene, Dimethyl sulfoxide, tetrahydrofuran, dimethylformamide, acetone, ethanol, methanol, keros...

Embodiment 1

[0037] Using the low-pressure distillation method, the adsorption and desorption cycle experiments were carried out on the graphene sponge adsorbed with toluene. That is, experiment with the same graphene sponge. The specific process is: put the graphene sponge that has absorbed toluene in a closed container, and then use a mechanical pump to pump out the gas in the container to reduce the air pressure in the container. At this time, the toluene will evaporate from the graphene sponge. After the distillation is completed, the graphene sponge is placed in toluene and absorbed again, and the cycle continues. Such as image 3 As shown, the experiment was carried out ten times. image 3 The adsorption and desorption amounts of graphene sponges in each experiment are shown. image 3 Among them, the abscissa indicates the number of cycles of the experiment, a total of ten times; the ordinate indicates the weight of the toluene adsorbed by the graphene sponge, in mg; the upper cur...

Embodiment 2

[0040] Using ethanol as the extractant, the adsorption and desorption cycle experiments were carried out on the graphene sponge adsorbed with dodecane. That is, experiment with the same graphene sponge. The specific process is: soak the graphene sponge adsorbed with dodecane in enough ethanol, and after the dodecane is basically dissolved in ethanol, take out the graphene sponge and place it in a 60°C incubator for 2 hours, and then take out and re-adsorb dodecane, and so cycle ten times. Figure 4 The adsorbed and residual amounts of graphene sponges in each experiment are shown. Figure 4 In , the abscissa represents the number of cycles of the experiment, a total of ten; the ordinate represents the weight of dodecane adsorbed by the graphene sponge, in mg. The upper curve represents the weight of adsorbed dodecane, and the lower curve represents the weight of the graphene sponge after the dodecane in the graphene sponge is distilled under low pressure.

[0041] From Fi...

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Abstract

The invention discloses an application method of a graphene sponge. The graphene sponge is applied to absorb organic solvents or oils due to the characteristics of strong organic solvent or oil adsorption capacity and high organic solvent or oil adsorption speed. The application method of the graphene sponge can be applied to the filed of sewage treatment or liquid-liquid separation. Furthermore, after the graphene sponge is applied to absorb the organic solvents or oils, the contamination is removed, namely, the organic solvents or oils are eliminated from the graphene sponge or recycled by adopting the low-pressure distillation and extraction or high-temperature distillation methods, thus the graphene sponge can be used repeatedly.

Description

technical field [0001] The invention relates to an application method of a graphene sponge. Background technique [0002] Due to the leakage of crude oil and the pollution of industrial organic solvents, the global water pollution problem is becoming more and more serious. In order to overcome environmental problems, it is extremely important to find an adsorbent that can effectively adsorb oil and organic pollutants and finally separate them from water (J.Yuan, X.Liu, O.Akbulut, J.Hu, S.L.Suib, J.Kong and F.Stellacci, Nat.Nanotechnol., 2008, 3, 332.; M.A.Shannon, P.W.Bohn, M.Elimelech, J.G.Georgiadis, B.J.Marinas and A.M.Mayes, Nature, 2008, 452, 301. ). Traditional adsorbents such as activated carbon have many disadvantages, including long adsorption time, poor selectivity, and limited adsorption capacity (D.Clifford, S.Subranmonian and T.J.Sorg, Environ.Sci.Technol., 1986, 20, 1072.; A.B. Fuertes, G. Marban and D.M. Nevskaia, Carbon, 2003, 41, 87.). Although expanded ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D15/00C02F1/28B01J20/20B01J20/34
CPCB01J20/20C09K3/32C01B31/00B01J20/28045
Inventor 孙立涛毕恒昌谢骁尹奎波周奕龙万树贺龙兵徐峰
Owner SOUTHEAST UNIV
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