Graphene loaded Cu-CuxO composite material and preparation method thereof

A technology of composite materials and graphene, which is applied in nanotechnology for materials and surface science, electrode manufacturing, electrical components, etc., can solve problems such as research work that has not been reported in the literature, and achieve excellent comprehensive performance, strong binding force, The effect of good crystal structure

Inactive Publication Date: 2012-01-11
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And so far about Cu-Cu x There is no literature report on the preparation of a three-phase compos

Method used

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  • Graphene loaded Cu-CuxO composite material and preparation method thereof
  • Graphene loaded Cu-CuxO composite material and preparation method thereof
  • Graphene loaded Cu-CuxO composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1.2 g of graphite oxide was added to 500 ml of deionized water, and the graphene oxide dispersion was obtained by ultrasonication for 4 hours. At the same time, 4.05 g of copper sulfate pentahydrate was dissolved in deionized water. The above two solutions were mixed evenly and put into a round bottom flask, stirred for 30 minutes, and sodium hydroxide solution was gradually added to adjust the pH of the solution to 9. The gel was transferred to a hydrothermal reaction kettle and reacted at 120°C for 12 hours. The hydrothermal product was washed several times by centrifugation with absolute ethanol and deionized water, and then vacuum freeze-dried. The obtained material was fired at 500°C under a nitrogen protective atmosphere for 2 hours, and cooled to room temperature to obtain graphene-supported Cu-Cu x O composite materials.

[0021] figure 1 It is the graphene loaded Cu-Cu prepared by embodiment 1 x XRD patterns of O composites. Depend on figure 1 The diffrac...

Embodiment 2

[0027] 1.2 g of graphite oxide was added into 500 ml of deionized water, and ultrasonicated for 2 hours to obtain a graphene oxide dispersion, and at the same time, 2.7 g of copper sulfate pentahydrate was dissolved in deionized water. Mix the above two solutions into a round bottom flask, stir for 30 minutes, gradually add dilute ammonia water, adjust the pH of the solution to 10, and fully precipitate the copper ions. The gel was transferred to the bottom of the hydrothermal reaction tank and reacted at 180°C for 20 hours. The hydrothermal product was filtered and washed several times with absolute ethanol and deionized water, and the graphene-loaded copper oxide composite material was obtained after vacuum freeze-drying. Then the obtained material was burned at 500°C under an argon protective atmosphere for 2 hours, and cooled to room temperature to obtain graphene-supported Cu-Cu x O composite materials.

[0028] figure 2(c) and (d) are SEM images of the composite mate...

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Abstract

The invention discloses a graphene loaded Cu-CuxO composite material and a preparation method thereof. Through the preparation method, Cu-CuxO composite particles with uniform particle size and controllable morphology and components can be loaded on graphene. The preparation method comprises the following steps of dispersing uniformly oxidized graphite in deionized water by supersonic waves to obtain an oxidized graphene solution, adding a copper salt into the oxidized graphene solution, mixing uniformly, adjusting a pH value of the mixed solution obtained by the previous step to an appropriate pH value, putting the mixed solution into a reactor for a hydro-thermal reaction, carrying out separation and calcination of reaction products obtained by the hydro-thermal reaction to obtain the graphene loaded Cu-CuxO composite material. The preparation method has the advantages of common and easily available raw materials, low cost, and simple and safe preparation processes. The prepared graphene loaded Cu-CuxO composite material has good structural stability, excellent physicochemical properties, and potential application values in the fields of lithium ion batteries, photoelectric conversion, catalytic degradation and electron devices.

Description

technical field [0001] The invention relates to a graphene loaded Cu-Cu x O composites, especially a graphene-supported Cu-Cu x The invention discloses an O composite material and a preparation method thereof, belonging to the technical field of preparation methods of novel functional composite materials. Background technique [0002] Due to its special contact interface structure and electronic properties, metal-oxide semiconductor composite systems have great potential in the fields of information, electronics, catalysis and energy storage, among which Cu-Cu x O-semiconductor composite materials have been extensively studied because of their versatility and low cost. Wang R C et al. reported on Acta Materialia 2011 822-829 that Cu-Cu was prepared by special heat treatment using copper nanodendritic single crystal 2 O and hollow Cu 2 O nanodendrites, which have special Raman spectral properties, have great application potential in sensors, electronic devices, and drug d...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/04C01B31/04C01G3/02B82Y30/00B82Y40/00
CPCY02E60/10
Inventor 田雷雷庄全超李佳吴超强颖怀
Owner CHINA UNIV OF MINING & TECH
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