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Method for preparing graphene through acetylacetone reduction

A technology of acetylacetone and graphene, applied in graphene, nano carbon and other directions, can solve problems such as environmental hazards, and achieve the effects of low cost, low toxicity and wide application prospects

Inactive Publication Date: 2014-09-10
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this method, phenylhydrazine is a highly toxic substance and is harmful to the environment.

Method used

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  • Method for preparing graphene through acetylacetone reduction
  • Method for preparing graphene through acetylacetone reduction
  • Method for preparing graphene through acetylacetone reduction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] figure 1 It is a schematic diagram of the overall process for preparing graphene by reduction of acetylacetone in the present invention.

[0026] Weigh 0.1g of graphene oxide into a beaker, add 250ml of deionized water, and ultrasonically disperse it completely; then transfer the graphene oxide aqueous solution into a round bottom flask, add 2ml of acetylacetone, and adjust the pH to 10 through concentrated ammonia water. Reflux for 24 hours; filter with suction, wash with methanol, acetone, and methanol in turn, and finally dry in vacuum to obtain graphene powder.

[0027] figure 2 is a scanning electron microscope image of graphene, image 3 is a transmission electron microscope image of graphene, from figure 2 and image 3 The obvious two-dimensional sheet structure of graphene can be seen. Figure 4 is the atomic force microscope photo and thickness value curve of graphene, from Figure 4 It can be seen that the length of the graphene sheet is between 0.5 an...

Embodiment 2

[0029] Weigh 0.5g of graphene oxide into a beaker, add 500ml of deionized water, and ultrasonically disperse it completely; then transfer the graphene oxide aqueous solution into a round bottom flask, add 10ml of acetylacetone, and adjust the pH to 10 through concentrated ammonia water. Reflux for 30 hours; filter with suction, wash with methanol, acetone, and methanol in turn, and finally dry in vacuum to obtain graphene powder.

Embodiment 3

[0031] Weigh 0.3g of graphene oxide in a beaker, add 350ml of deionized water, and ultrasonically disperse it completely; then transfer the graphene oxide aqueous solution into a round bottom flask, add 7ml of acetylacetone, and adjust the pH to 10 through concentrated ammonia water. Reflux for 28 hours; filter with suction, wash with methanol, acetone, and methanol in turn, and finally dry in vacuum to obtain graphene powder.

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Abstract

The invention discloses a method for preparing graphene through acetylacetone reduction, which specifically comprises the following steps: weighing a certain amount of graphene oxide in a beaker, adding appropriate deionized water, and performing complete dispersion by ultrasonic treatment; transferring the aqueous solution of graphene oxide into a round-bottom flask, adding appropriate acetylacetone, adjusting the pH to alkalinity by use of stronger ammonia water, and performing reflux for a period of time; performing suction filtration, and washing once with methanol, acetone and methanol sequentially; performing vacuum drying to obtain graphene powder. The method disclosed by the invention has the advantages that the acetylacetone reducing agent is low in toxicity, low in cost and environment-friendly and has a complexing action on metal ions; prepared graphene can be used for adsorbing heavy metal ions, and has broad application prospects in sewage treatment and drinking water purification.

Description

technical field [0001] The invention belongs to the field of preparation of two-dimensional nanometer materials, and relates to a preparation method of graphene. Background technique [0002] Graphene is the thinnest and hardest material in the world, because of its excellent mechanical, electrical, thermal, optical and other properties, as well as a large specific surface area (theoretical 2630cm 2 / g), has attracted the attention of the entire scientific community, and has broad applications in fuel cells, photovoltaic devices, supercapacitors, polymer composites, drug delivery, and ion detection. [0003] The preparation methods of graphene include mechanical exfoliation method, arc discharge method, chemical vapor deposition method and chemical reduction method, etc. Among them, in the chemical reduction method, the reducing agent can directly reduce graphene oxide to prepare graphene. The surface of the prepared graphene contains a large number of functional groups, su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/184
Inventor 杨志柴静胡南滔高润纲张亚非
Owner SHANGHAI JIAO TONG UNIV
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