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Preparation method of graphene oxide thin film

A graphene film and graphite technology, which is applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve the problems of limited shape and size of graphene films, serious stacking of graphene layers, and thick film preparation, and achieves convenient preparation process. The effect of fast, enhanced conductivity, good electrical properties

Inactive Publication Date: 2016-01-13
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation of graphene oxide film by suction filtration has been widely used, but the shape and size of the prepared graphene film are very limited, and the stacking of graphene layers is serious and takes a long time; secondly, the method of scraping can prepare a larger area. Graphene oxide films, but there are problems such as single shape, thicker films, difficult transfer, and low specific surface area caused by close stacking of graphene oxide layers.

Method used

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  • Preparation method of graphene oxide thin film
  • Preparation method of graphene oxide thin film
  • Preparation method of graphene oxide thin film

Examples

Experimental program
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Embodiment 1

[0035] At room temperature, weigh 100 mg of graphite oxide and disperse it in 10 mL of ultrapure water. After sonicating in a water bath for 30 minutes, the cells are crushed for 5 minutes to obtain a uniformly dispersed graphite oxide aqueous solution. Dip the graphite oxide aqueous solution lightly with a wolf hair pen and write on the copper foil. "Chinese", the copper foil is fixed on the hot stage, the heating temperature of the hot stage is 45℃, each layer is heated for 2 minutes, the graphite oxide dispersion is almost dried on the surface of the copper foil, repeat 20 along the lines of the first writing After each brushing, heating and drying and micro-reduction are performed to avoid excessive stacking between graphene sheets, and a partially reduced graphene film with a thickness of about 2 μm and a low stacking degree is obtained. The prepared Chinese character shape graphene film digital picture such as figure 1 As shown, the XRD pattern is as Image 6 -a shown.

Embodiment 2

[0037] At room temperature, weigh 150 mg of graphite oxide and disperse it in 10 mL of ultrapure water. After sonicating in a water bath for 45 minutes, the cells are crushed for 5 minutes to obtain a uniformly dispersed graphite oxide aqueous solution. Dip the graphite oxide aqueous solution lightly with a wolf hair pen and write on the copper foil. "Chinese" and "DHUCN", the copper foil is fixed on the hot table, the heating temperature of the hot table is 30℃, and each layer is heated for 2 minutes. The graphite oxide dispersion is almost dried on the surface of the copper foil. Repeated 20 times, heating and drying and micro-reduction were performed after each brushing to avoid excessive stacking between graphene sheets, and a partially reduced graphene film with a thickness of about 1.5 μm and a low stacking degree was obtained. Digital pictures of graphene film in the shape of Chinese characters and letters prepared on plant fiber writing paper such as figure 2 Shown.

Embodiment 3

[0039] At room temperature, weigh 50 mg of graphite oxide and disperse it in 10 mL of ultrapure water. After 30 minutes of sonication in the water bath, the cells are crushed for 5 minutes to obtain a uniformly dispersed graphite oxide aqueous solution. Dip the graphite oxide aqueous solution lightly with a small letter writing brush and draw on the copper foil The copper foil is fixed on the hot table. The heating temperature of the hot table is 65℃, and each layer is heated for 2 minutes. The graphite oxide dispersion is almost dried on the surface of the copper foil. Repeated 50 times, heating and drying and micro-reduction were performed after each brushing to avoid excessive stacking between graphene sheets, and to obtain a partially reduced graphene film with a thickness of about 2.5 μm and a low stacking degree. Prepared on the surface of the cellulose filter membrane Shaped graphene film, the graphene-based cellulose filter membrane is removed with ethanol solution and ...

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Abstract

The invention relates to a preparation method of a graphene oxide thin film, which includes the following steps: dipping a writing brush in a graphene oxide water solution, brushing the graphene oxide water solution on a substrate and heating and drying the substrate to prepare the graphene oxide thin film. The method is simple in operation method and is convenient and quick to carry out. The graphene oxide thin film is controllable in macroscopic size, shape and other parameters and in reduction degree, is effectively reduced in stacking among graphene lamellas, and is enhanced in electric-conductivity.

Description

Technical field [0001] The invention belongs to the field of preparation of thin film materials, and particularly relates to a preparation method of a graphene oxide film. Background technique [0002] Graphene is a two-dimensional material with a single atomic layer of carbon atoms closely packed in a hexagonal structure. The intrinsic mobility of carriers can reach 2×105cm / (V*S), and the electron transfer speed at room temperature is that of a known conductor. The fastest, and it is the thinnest and strongest material among the known materials. Because of these excellent properties, it has great application value in electronic devices and other fields. [0003] Graphene is often used as a filler for conductive nanomaterials because of its unique physical and chemical structure, which makes it have good thermal stability, light transmittance, electrical conductivity and mechanical strength. Widely concerned, although many preparation methods have been developed, there are still s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/198
Inventor 李耀刚李佳慧侯成义王宏志张青红
Owner DONGHUA UNIV
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