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Preparation method for electroactive aniline oligomer-modified graphene

An oligomer and graphene technology, applied in the field of preparation of electroactive aniline oligomer modified graphene, can solve the problems of insoluble polyaniline, poor processing, complex structure, etc. The effect of broad application prospects

Inactive Publication Date: 2013-05-08
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, polyaniline is insoluble and difficult to process, and has a complex structure, while aniline oligomers have similar electrical activity to polyaniline, but are soluble in many solvents, and have a clear structure and are easy to process; so far, graphene has been treated with aniline oligomers Carry out covalent modification, improve the solubility of graphene and improve the electrochemical activity of graphene, related materials and preparation methods have not been reported yet

Method used

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  • Preparation method for electroactive aniline oligomer-modified graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Mix 2.5g of natural graphite, 2.5g of sodium nitrate and 100ml of sulfuric acid, keep the ice bath at 0~5℃, slowly add 7.5g of potassium permanganate, stir continuously for 1h, add deionized water, and heat to maintain the temperature at 95~ Stir at 100°C for 15-30 minutes, then add 100ml of ionized water and hydrogen peroxide, and add the hydrogen peroxide dropwise until the solution stops bubbling. Suction filter and wash with 160ml of 5% hydrochloric acid aqueous solution (the molar ratio of hydrochloric acid to potassium permanganate is 2:1), and finally wash with deionized water to obtain graphite oxide. Graphite oxide was reduced with 15 g of sodium borohydride aqueous solution at 80°C for 2 hours; after the reaction was completed, it was cooled to room temperature, centrifuged and washed, and vacuum-dried at 40°C for 2 hours to obtain a product of reduced graphene.

[0020] 0.01g of reduced graphene and 0.2g of aniline tetramer are ultrasonically dispersed in ace...

Embodiment 2

[0024] Mix 2.5g of natural graphite, 2.5g of sodium nitrate and 100ml of sulfuric acid, keep the ice bath at 0~5°C, slowly add 10g of potassium permanganate, stir continuously for 1 hour, add deionized water, heat to maintain the temperature at 100°C, Stir for 30 minutes, then add 100ml of ionized water and hydrogen peroxide, and add the hydrogen peroxide dropwise until the solution stops bubbling. Suction filter and wash with 640ml of 5% hydrochloric acid aqueous solution (the molar ratio of hydrochloric acid to potassium permanganate is 5:1), and finally wash with deionized water to obtain graphite oxide. Graphite oxide was reacted with 50 g of sodium borohydride aqueous solution at 100° C. for 24 hours; after the reaction was completed, it was cooled to room temperature, centrifuged and washed, and vacuum-dried at 100° C. for 24 hours to obtain reduced graphene.

[0025] 0.01g of reduced graphene and 0.005 aniline pentamer are ultrasonically dispersed in ethanol, and then a...

Embodiment 3

[0028] Mix 2.5g of natural graphite, 2.5g of sodium nitrate and 100ml of sulfuric acid, keep the ice bath at 0~5°C, slowly add 7.5g of potassium permanganate, stir continuously for 1 hour, add deionized water, and heat to maintain the temperature at 95°C , stirred for 20 minutes, then added 200ml of ionized water and hydrogen peroxide, and added the hydrogen peroxide dropwise until the solution stopped bubbling. Suction filter and wash with 320ml of 5% hydrochloric acid aqueous solution (the molar ratio of hydrochloric acid to potassium permanganate is 4:1), and finally wash with deionized water to obtain graphite oxide. Graphite oxide was reacted with 100ml of hydrazine hydrate at 90°C for 16h; after the reaction was completed, it was cooled to room temperature, centrifuged and washed, and vacuum-dried at 60°C for 16h to obtain a product of reduced graphene.

[0029]0.01g of reduced graphene and 0.15g of aniline hexamer were ultrasonically dispersed in tetrahydrofuran, and th...

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Abstract

The invention relates to a preparation method for electroactive aniline oligomer-modified graphene. The preparation method comprises the following steps of: reducing graphite oxide by a reducing agent, cooling the reduced graphite oxide to the room temperature, centrifuging and drying the cooled graphite oxide to obtain the reduced graphene; ultrasonically dispersing the reduced graphene and the aniline oligomer into an organic solvent; adding dicyclohexyl carbodiimide and 4-dimethylamino-pyridine to the mixed solution; stirring and heating up the mixture for reacting; washing the mixture by a plurality of times by using acetone, alcohol and distilled water in sequence after the reaction is completed; and drying the mixture to obtain the aniline oligomer-modified graphene; doping the aniline oligomer-modified graphene by hydrochloric acid or dodecylbenzene sulfonic acid to obtain the electroactive aniline oligomer-modified graphene. The preparation method has the beneficial effects that the solubility in the organic solvent is improved and the specific capacitance reaches 160 F / g, so that the electroactive aniline oligomer-modified graphene has a broader application prospect in the fields such as super capacitors, solar cells and the like.

Description

technical field [0001] The invention relates to a preparation method of electroactive aniline oligomer modified graphene. Background technique [0002] In 2004, Geim et al. of the University of Manchester in the United Kingdom prepared graphite-graphene with a single-layer structure for the first time by means of micromechanical exfoliation (see Novoselov K S, Geim A K, Morozov S V, et al . Science, 2004, 306, 666-669). Graphene has a very high specific surface area, excellent thermal conductivity, electrical conductivity and mechanical properties, and high-speed electron mobility at room temperature, and has potential application prospects in electronic devices, biomedicine and other fields. Recently, many researchers have devoted themselves to the synthesis of large-scale and large-scale graphene. The chemical redox method in the solution system is a low-cost, potential method for mass production of graphene. The process is to obtain graphite oxide after graphite is oxid...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01B32/184C01B32/194
Inventor 杜飞鹏叶恩洲朱洁李亚琴
Owner WUHAN INSTITUTE OF TECHNOLOGY
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