Three-dimensional graphene aerogel material for dye adsorption and preparation method thereof

A graphene aerogel, graphene technology, applied in chemical instruments and methods, other chemical processes, etc., can solve problems such as structure fixation, and achieve the effects of high porosity, fast adsorption, and simple operation

Active Publication Date: 2016-03-23
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the three-dimensional graphene obtained by the current method, the connection force between graphene sheets is mostly physic

Method used

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  • Three-dimensional graphene aerogel material for dye adsorption and preparation method thereof
  • Three-dimensional graphene aerogel material for dye adsorption and preparation method thereof
  • Three-dimensional graphene aerogel material for dye adsorption and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] Example 1

[0025] 1) Preparation of 2-urea-4-[H]-pyrimidinone: Weigh 0.125g of 6-methylisocytosine into a three-necked flask, then add 1.008g of 1,6-hexamethylene diisocyanate, and put it in an argon atmosphere. Under the protection of the atmosphere, the reaction was carried out at 80°C for 12 hours, and then precipitated with petroleum ether with a boiling point of 30-60, separated and dried to obtain 0.26 g of the product 2-urea-4-[H]-pyrimidinone.

[0026] 2) Reaction of 2-urea-4-[H]-pyrimidinone with graphene oxide: Weigh 0.26g of 2-urea-4-[H]-pyrimidinone into a three-necked flask, and pour 30ml of anhydrous N, N-Dimethylformamide; then add 0.13g of graphene oxide, ultrasonic for 30 minutes to make the mixture uniformly dispersed; add one part per thousand of dibutyltin dilaurate, and react at 80℃ under the protection of argon atmosphere After 6 hours, filtered with suction to obtain 0.3 g of the product 2-urea-4-[H]-pyrimidinone modified graphene.

[0027] 3) Prepara...

Example Embodiment

[0028] The scanning electron micrograph of the three-dimensional graphene material obtained in Example 1 is as follows figure 1 As shown, the morphology presents a three-dimensional interpenetrating porous structure; take a certain amount of samples to test Fourier transform infrared absorption spectroscopy (FTIR), the results are as follows figure 2 As shown, the spectrum shows the typical absorption peaks of graphene and 2-urea-4-[H]-pyrimidinone; a certain amount of sample is taken to test X-ray diffraction, and the results are as follows image 3 As shown, an obvious peak appears at θ=9.5° on the spectrum, indicating that the layer spacing between graphene sheets increases after the graphene oxide is modified with 2-urea-4-[H]-pyrimidinone.

Example Embodiment

[0029] Example 2

[0030] 1) Preparation of 2-urea-4-[H]-pyrimidinone: Weigh 0.25g of 6-methylisocytosine into a three-necked flask, then add 2.016g of 1,6-hexamethylene diisocyanate, and put it in an argon atmosphere. Under atmosphere protection, react at 90°C for 18 hours, then precipitate with 30-60 boiling point petroleum ether, separate and dry to obtain 0.54 g of 2-urea-4-[H]-pyrimidinone.

[0031] 2) Reaction of 2-urea-4-[H]-pyrimidinone with graphene oxide: Weigh 0.54g of 2-urea-4-[H]-pyrimidinone into a three-necked flask, and pour 60ml of anhydrous N, N-Dimethylformamide; add 0.18g of graphene oxide and ultrasonic for 60 minutes to make the mixture uniformly dispersed; add five percent of dibutyltin dilaurate, under the protection of argon atmosphere, at 80℃ After reacting for 12 hours, the product 2-urea-4-[H]-pyrimidinone modified graphene 0.55g was obtained by suction filtration.

[0032] 3) Preparation of graphene with three-dimensional structure: Disperse 0.55g of 2-...

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Abstract

The invention relates to a three-dimensional graphene aerogel material for dye adsorption and a preparation method thereof. First, graphene oxide and 2-urea-4-[H]-pyrimidone molecules are dissolved in anhydrous N,N-dimethyl formamide, wherein dibutyltin dilaurate serves as a catalyst, and reaction is performed for a period of time to obtain 2-urea-4-[H]-pyrimidone modified graphene; the 2-urea-4-[H]-pyrimidone modified graphene is dissolved in the anhydrous N,N-dimethyl formamide, distilled water is added to enable the 2-urea-4-[H]-pyrimidone modified graphene to be self-assembled into a loose porous structure; the N,N-dimethyl formamide is removed by exchanging the solvents, and low-temperature freeze-drying is performed to obtain the three-dimensional graphene material. By the adoption of the technical scheme, the operation is simple and fast and is environmentally friendly, and the prepared aerogel material is high in porosity and large in specific surface area and is expected to be applied to the fields of dyes, heavy metal adsorption and the like.

Description

technical field [0001] The invention belongs to the technical field of airgel materials for dye adsorption, and more specifically relates to a three-dimensional graphene structure material modified by 2-urea-4-[H]-pyrimidinone molecules and a preparation method thereof. Background technique [0002] Graphene, the English name is Graphene, is a two-dimensional (2D) carbon nanomaterial composed of a single layer of carbon atoms. It is another new type of carbon nanomaterial discovered after fullerene and carbon nanotubes. Graphene is also known as single-layer graphite, because its atomic arrangement is exactly the same as that of graphite single atom, and it is carbon atom with sp 2 The hybrid form is a single-layer two-dimensional crystal closely arranged in a honeycomb structure. Graphene, a single-layer two-dimensional carbon material, has attracted widespread attention due to its large specific surface area, high electrical and thermal conductivity, and excellent mechani...

Claims

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Application Information

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IPC IPC(8): C01B31/04B01J20/20
Inventor 封伟韩军凯沈永涛冯奕钰
Owner TIANJIN UNIV
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