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Preparation method of graphene/nanometer particle composite materials based on infrared ray radiation

A nanoparticle and composite material technology, applied in the field of graphene/nanoparticle composite material preparation, can solve difficult reduction processing, uncontrollable size and thickness of graphene sheets, difficult to meet large area or large amount of graphite oxide reduction requirements, etc. problem, to achieve the effect of low production cost, favorable for popularization and utilization, and short heating and cooling cycle

Active Publication Date: 2012-10-03
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] 1. Oriented epigenetic graphene, that is, graphene grows on the oriented metal surface by chemical vapor deposition (CVD). This method can theoretically achieve infinitely long and very wide graphene thin layers, but requires high temperature and The use of aggressive chemicals is required in the process of peeling the graphene from the surface of the metal substrate;
[0006] 2. Micromechanical exfoliation method. The quality of graphene obtained by this method is relatively good, which is suitable for studying the electrical properties and other properties of graphene, but the size and thickness of graphene sheets obtained by this method are currently uncontrollable;
The reduction speed of this method is very fast, but its operation process is intermittent, it is difficult to carry out continuous reduction processing, and it is difficult to meet the reduction requirements of large areas or large amounts of graphite oxide.

Method used

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  • Preparation method of graphene/nanometer particle composite materials based on infrared ray radiation
  • Preparation method of graphene/nanometer particle composite materials based on infrared ray radiation
  • Preparation method of graphene/nanometer particle composite materials based on infrared ray radiation

Examples

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Effect test

Embodiment 1

[0031] React 3g of graphite, 3g of sodium nitrate, 60mL of concentrated sulfuric acid (98%) and 6g of potassium permanganate at 35°C for 2 hours, then add 100mL of deionized water, and then add hydrogen peroxide with a weight percentage of 3%. Hydrogen oxide aqueous solution 200mL, pickling and water washing after standing for 12 hours to obtain graphite oxide jelly. The graphite oxide jelly was vacuum-dried or freeze-dried at a room temperature of 25° C. to obtain a solid graphite oxide. Use an infrared heating lamp with a power of 275W to irradiate it at a distance of 10 mm from the graphite oxide solid for 1 minute, and a reduction reaction occurs to obtain a reduced graphite oxide solid. Scanning electron micrographs of reduced graphite oxide solids as figure 1 As shown, it can be seen that the structure of the reduced graphite oxide obtained under this condition is loose and porous, indicating that the reduction process is relatively violent and a large amount of gas is ...

Embodiment 2

[0034] The graphite oxide jelly prepared in Example 1 was diluted with water to a weight percentage of graphite oxide of 0.01%, and then spin-coated on the glass surface to form a film of graphite oxide. After heating and drying at 70°C, the water content was reduced to 5%, and then an infrared heating lamp with a power of 275W was irradiated at a distance of 200 mm from the graphite oxide film for 60 minutes to obtain a reduced graphite oxide film. Scanning electron micrographs of the cross-section of the reduced graphite oxide film image 3 As shown, uniform and non-porous reduced graphite oxide films can be obtained under this condition.

Embodiment 3

[0036] 1) Mix 200 parts of an aqueous suspension of graphite oxide with a weight percent of graphite oxide of 0.5% and 10 parts of an aqueous suspension of silicon nanoparticles with a weight percent of silicon nanoparticles of 1%, and the silicon nanoparticles The diameter of the particles is 40nm~60nm, and the mixed solution is obtained after stirring evenly. The mixed solution is poured into the sample tank, and dried in an oven at 70°C for 2 hours until the weight percentage of the total solvent is equal to 46%, and graphite oxide is obtained. / composite of silicon nanoparticles;

[0037] 2) Use an infrared heating lamp with a power of 275W to irradiate it at a distance of 100 mm from the composite of graphite oxide / silicon nanoparticles in step 1) for 60 minutes to obtain 0.6 parts of reduced graphite oxide / silicon nanoparticles composite material ( That is, graphene / silicon nanoparticle composite material), its volume resistivity is 150Ω·cm, and its conductivity is exce...

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Abstract

The invention discloses a preparation method of graphene / nanometer particle composite materials based on infrared ray radiation. The preparation method comprises the following steps that 1) graphite oxide solution is mixed with nanometer particle water suspension to obtain mixing liquid, the materials are cast and dried until the weight percentage of total solvents is lower than or equal to 50 percent, and composite products are obtained; and 2) solvents in the composite products are removed under the radiation of an infrared ray heating lamp, in addition, the reduction reaction of the graphite oxide is carried out, and the graphene / nanometer particle composite materials are obtained. According to the preparation method, the graphene / nanometer particle composite materials are prepared under the radiation of the infrared ray heating lamp, the process is very simple and convenient, the production cost is very low, the industrial large-scale production is favorably realized, different kinds of nanometer particles can be selected, different graphene / nanometer particle composite materials can be prepared, different production and use requirements can be met, and wide application prospects are realized in the fields of electrode materials, conducting fillings and the like.

Description

technical field [0001] The invention relates to the field of preparation of graphene / nanoparticle composite materials, in particular to a preparation method of graphene / nanoparticle composite materials based on infrared radiation. Background technique [0002] Graphene is a single-layer carbon material composed of carbon atoms. In 2004, A.K.Geim of the University of Manchester and his collaborators reported for the first time that graphene was obtained by exfoliating graphite with plastic tape (K.S.Novoselov, A.K.Geim, S.V.Morozov, D.Jiang, Y.Zhang, S.V.Dubonos, I.V.Grigorieva, A.A. Firsov, Electric Field Effect in Atomically Thin Carbon Films, Science, 306, 22, 2004, 666-669). Subsequently, graphene began to be favored by researchers all over the world. [0003] Graphene has a large specific surface area (2360m 2 g -1 ), higher electron mobility (200000cm 2 · v -1 ·s -1 ), higher Young's modulus (1.0TPa), higher thermal conductivity (5000W·m -1 ·K -1 ) and light tr...

Claims

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Application Information

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IPC IPC(8): B01J13/02
Inventor 彭懋郭宏磊孙丽娜郭唐华
Owner ZHEJIANG UNIV
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