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Wrapped monolayer graphene oxide/ carbon nano tube compound and preparation method thereof

A technology of graphene nanosheets and carbon nanotubes, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of operation troubles, difficult method conditions, distribution of graphene oxide and carbon nanotubes Unevenness and other problems, to achieve the effect of simple method, uniform distribution and easy operation

Active Publication Date: 2016-04-20
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the method conditions for preparing wrapped single-layer graphene oxide / carbon nanotube composites are difficult, the operation is cumbersome, and the distribution of graphene oxide and carbon nanotubes in the prepared composite is not uniform. These objective problems Hinders the application of wrapped single-layer graphene oxide / carbon nanotube composites

Method used

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  • Wrapped monolayer graphene oxide/ carbon nano tube compound and preparation method thereof
  • Wrapped monolayer graphene oxide/ carbon nano tube compound and preparation method thereof
  • Wrapped monolayer graphene oxide/ carbon nano tube compound and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] (1) Preparation of single-layer graphene oxide nanosheets: graphite oxide was prepared by the modified Hummers method (Marcano, etc., ACSnano, 2010, 4(8):4806). Weigh 3g of graphite powder into a 500mL three-necked flask, add 360mL of concentrated H 2 SO 4 (98%) and 40mLH 3 PO 4 (85%), under ice bath condition, slowly add 18gKMnO 4 , kept the mixture at 50°C for 12 h, cooled the reaction mixture to room temperature, poured it on ice cubes made of 400 mL of deionized water, and slowly added about 3 mL of H 2 o 2 (30%), after the mixture was filtered, it was centrifuged and washed 5 times with HCl (10%) at 10,000 rpm. Next, the obtained product was put into a dialysis bag, dialyzed for 3 weeks, and then dried in a vacuum freeze dryer for 48 hours to a constant weight to obtain brown graphite oxide. Prepare a 1 mg / mL graphite oxide solution, ultrasonically strip it for 4 hours, use a high-speed centrifuge to centrifuge at 8,000rmp, take the centrifugate, and collect ...

Embodiment 2

[0063] Repeat Example 1, except that the time for the stripping described in step (1) is 6 hours by ultrasonic stripping, and the separation is by centrifugation, and the centrifuge is centrifuged at 6,000rmp for 50min, and the centrifuged liquid is taken out, collected and centrifuged at 12,000rmp for 20min The sediment A. The yield was 84%.

Embodiment 3

[0065] Repeat Example 1, except that the mass fraction of nitric acid in step (2) is 40%, the mass fraction of concentrated sulfuric acid is 80%, and the volume ratio of nitric acid and sulfuric acid is 1:2; The time is 3h; the time of ultrasonic cutting is 60min, and the ultrasonic power is 200W; the separation adopts centrifugation, and the centrifuge is centrifuged at 8,000rmp for 20min, the centrifugate is taken out, and the sediment that is centrifuged at 12,000rmp for 20min is collected b. After isolation, it was dried under vacuum at 80 °C. The yield was 56%.

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Abstract

The invention discloses a wrapped monolayer graphene oxide / carbon nano tube compound and a preparation method thereof. The compound is in a particle type; the compound particle has a core-shell type wrapping structure by adopting a monolayer graphene oxide nanosheet as a shell and an acidized and cut carbon nano tube as a core, or a closed dumpling-shaped wrapping structure by adopting a single monolayer graphene oxide nanosheet as a dumpling-wrapper and the acidized and cut carbon nano tube as a dumpling-stuffing. The technical scheme provided by the invention has the characteristics of simplicity, convenience, and easiness in operation. Due to the bending of a graphene oxide sheet layer and the electric charge loaded on the surface of the graphene oxide sheet layer, the obtained compound material can be highly dispersed, not easy liable to agglomeratereunite and cake, and easy to store, and meanwhile, the compound material can be easily reduced to obtain the graphene / carbon nano tube compound material. The theoretical research proves that the wrapped novel special structure has strong electrical conductivity and mechanical performance.

Description

technical field [0001] The invention belongs to the technical field of inorganic non-metallic material engineering, and in particular relates to a packaged single-layer graphene oxide / carbon nanotube composite and a preparation method thereof. Background technique [0002] Graphite (made of graphene stacked up layer by layer) is the softest mineral, but after being separated into graphene with a thickness of one carbon atom, its performance changes suddenly. Its hardness is higher than that of diamond, but it has excellent properties. flexible and can be bent. When the Royal Swedish Academy of Sciences announced the 2010 Nobel Prize in Physics, it compared its strength like this: a hammock made of single-layer graphene can carry a 4kg rabbit. In this way, it can be estimated that if multiple layers of graphene are stacked together so that the thickness is the same as that of food preservation film, it can carry a 2-ton car. [0003] Both graphene and carbon nanotubes are e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04B82Y30/00B82Y40/00
CPCC01P2002/82C01P2004/04C01P2004/50C01P2004/61C01P2004/62C01P2004/80
Inventor 邓克勤周建红李春香
Owner HUNAN UNIV OF SCI & TECH
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