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Controllable preparation method of graphene oxide and graphene oxide quantum dots

An oxide stone and quantum dot technology, applied in nanotechnology and other directions, can solve the problems of cumbersome preparation process, low efficiency and unenvironmental protection, and achieve the effects of simple operation, high safety and short time consumption.

Active Publication Date: 2016-12-14
湖南小净熊环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the problems that the current methods for preparing graphene oxide and graphene oxide quantum dots have cumbersome preparation process, danger, environmental protection, and low efficiency, the present invention provides a method for controllable preparation of graphene oxide and graphene oxide quantum dots, This method uses ordinary black carbon as raw material to add a certain amount of hydrogen peroxide, and can realize the controllable synthesis of graphene oxide and graphene oxide quantum dots by controlling the time of hydrothermal reaction.

Method used

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  • Controllable preparation method of graphene oxide and graphene oxide quantum dots
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  • Controllable preparation method of graphene oxide and graphene oxide quantum dots

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Embodiment 1

[0046] Mix 0.02 g of black carbon and 15 ml of 1% hydrogen peroxide evenly; transfer the above mixed solution to a polytetrafluoroethylene hydrothermal reaction kettle with a volume of 25 ml, seal it and put it in a vacuum drying oven; react at 180°C for 30 Minutes; after the reaction, cool to room temperature, and centrifuge the product solution at 10,000 rpm for 10 minutes to remove unreacted complete black carbon; obtain an aqueous solution of graphene oxide; dry the aqueous solution of graphene oxide in vacuum to obtain a graphene oxide powder.

Embodiment 2

[0048] Mix 0.2 gram of black carbon with 15 milliliters of 2% hydrogen peroxide evenly; transfer the above mixed solution to a polytetrafluoroethylene hydrothermal reaction kettle with a volume of 25 milliliters, seal it and put it in a vacuum oven; react at 160°C for 40 minutes; after the reaction, cool to room temperature, and centrifuge the product solution at 10,000 rpm for 10 minutes to remove unreacted complete black carbon; obtain a graphene oxide aqueous solution; freeze-dry the gained graphene oxide aqueous solution to obtain a graphene oxide powder.

Embodiment 3

[0050] Mix 0.5 gram of black carbon with 20 milliliters of 2% hydrogen peroxide evenly; transfer the above mixed solution to a polytetrafluoroethylene hydrothermal reaction kettle with a volume of 30 milliliters, seal it and put it in a vacuum oven; react at 200°C for 50 Minutes; after the reaction, cool to room temperature, and centrifuge the product solution at 10,000 rpm for 10 minutes to remove unreacted complete black carbon; obtain an aqueous solution of graphene oxide; dry the aqueous solution of graphene oxide in vacuum to obtain a graphene oxide powder.

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Abstract

The invention belongs to the technical field of carbon nano-materials, and relates to a controllable preparation method of graphene oxide and graphene oxide quantum dots. The method comprises the following concrete steps: common black charcoal is used as a raw material, a certain amount of hydrogen peroxide is added, and uniform mixing is carried out; mixed liquor is transferred into a polytetrafluoroethylene hydro-thermal reaction vessel, and a hydro-thermal reaction is carried out for a period of time at a certain temperature; centrifugation is carried out for an obtained product solution in order to remove unreacted black charcoal, and an aqueous solution of graphene oxide or graphene oxide quantum dots; the obtained aqueous solution is dried, in order to obtain graphene oxide powder and / or graphene oxide quantum dot powder. In the preparation process, only the reaction time is controlled, in order to realize controllable synthesis of graphene oxide and / or graphene oxide quantum dots. A one-step hydrothermal method is used, and the method has the advantages of simple operation process, short time consuming, green environmental protection, controllable products, etc.

Description

technical field [0001] The invention belongs to the technical field of carbon nanomaterial preparation, and relates to a method for controllably preparing graphene oxide and graphene oxide quantum dots. Background technique [0002] In recent years, graphene-based nanomaterials have been favored by researchers because of their excellent electrochemical properties, good chemical stability, and thermal stability. However, due to the characteristics of graphene such as hydrophobicity and easy agglomeration, the wide application of graphene is limited. Graphene oxide, as a derivative of graphene, just solves the above problems. Compared with graphene, graphene oxide contains more oxygen-containing functional groups, which endows graphene oxide with good water solubility and easy modification, making it have greater application value. However, the current methods for preparing graphene oxide generally have disadvantages such as many steps, long time-consuming, and the need to u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04B82Y40/00
CPCC01P2002/84C01P2004/04C01P2004/22C01P2004/64C01P2006/60
Inventor 张友玉卢求钧李海涛刘美玲姚守拙
Owner 湖南小净熊环保科技有限公司