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Composite aerogel of graphene/Prussian-blue complexes, and preparation method and application thereof

A graphene aerogel and composite aerogel technology, applied in chemical instruments and methods, chemical/physical processes, colloidal chemistry, etc., can solve problems such as application limitations of graphene aerogels, and achieve poor stability and electrical conductivity. High sex, low density effect

Inactive Publication Date: 2012-12-19
陶丽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of a single graphene airgel is still very limited, so it is necessary to combine graphene with other materials to broaden the application fields of graphene airgel

Method used

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  • Composite aerogel of graphene/Prussian-blue complexes, and preparation method and application thereof
  • Composite aerogel of graphene/Prussian-blue complexes, and preparation method and application thereof
  • Composite aerogel of graphene/Prussian-blue complexes, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A preparation method of graphene / Prussian blue complex complex airgel, the method steps are as follows:

[0056] (1) Ultrasonicate 60mg of graphene oxide with deionized water to a concentration of 0.1mg mL -1 Suspension of the graphene oxide suspension, adding potassium ferricyanide to the graphene oxide suspension, obtaining suspension A after ultrasonic dispersion;

[0057] (2) dissolving ferric chloride in an aqueous solution containing vitamin C to obtain solution B;

[0058] The mass ratio of vitamin C, graphene oxide, potassium ferricyanide and ferric chloride is 1.2:1:60:20; in the obtained composite airgel, graphene / Fe 4 [Fe(CN) 6 ] 3 The quality is about 1:100;

[0059] (3) Mix the suspension A and the solution B, sonicate until the mixture is uniform, and let it stand in a water bath at room temperature for 48 hours to obtain a uniform and non-flowing block composite hydrogel;

[0060] (4) Add ethanol to the composite hydrogel, pour out the ethanol after ...

Embodiment 2

[0062] A preparation method of graphene / Prussian blue complex complex airgel, the method steps are as follows:

[0063] (1) Ultrasonicate 60mg of graphene oxide with deionized water to make a concentration of 15mg mL -1 Suspension of the graphene oxide suspension, adding potassium ferricyanide to the graphene oxide suspension, obtaining suspension A after ultrasonic dispersion;

[0064] (2) dissolving ferric nitrate in an aqueous solution containing sodium borohydride to obtain solution B;

[0065] The mass ratio of sodium borohydride, graphene oxide, potassium ferricyanide and ferric nitrate is 50:1:0.06:0.32; in the composite airgel obtained, graphene mass / Fe 4 [Fe(CN) 6 ] 3 The quality is about 1:1;

[0066] (3) Mix the suspension A and the solution B, sonicate until the mixture is uniform, and then let it stand in a water bath at 60°C for 12 hours to obtain a uniform block composite hydrogel;

[0067](4) Add ethanol to the composite hydrogel, pour out the ethanol afte...

Embodiment 3

[0069] A preparation method of graphene / Prussian blue complex complex airgel, the method steps are as follows:

[0070] (1) Ultrasonicate 60mg of graphene oxide with deionized water to make a concentration of 35mg mL -1 Suspension of the graphene oxide suspension, adding potassium ferricyanide to the graphene oxide suspension, obtaining suspension A after ultrasonic dispersion;

[0071] (2) dissolving ferric sulfate in an aqueous solution containing glutathione to obtain solution B;

[0072] The mass ratio of glutathione, graphene oxide, potassium ferricyanide and ferric sulfate is 150:1:7.5×10 -4 :5.25×10 -3 ; In the resulting composite airgel, graphene / Fe 4 [Fe(CN) 6 ] 3 The quality is about 100:1;

[0073] (3) Mix the suspension A and the solution B, sonicate until the mixture is uniform, and then let it stand in a water bath at 100°C for 30 minutes to obtain a uniform block composite hydrogel;

[0074] (4) The immersion and drying process is the same as in Example 1...

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Abstract

The invention relates to composite aerogel of graphene / Prussian-blue complexes, and a preparation method and application thereof. The composite aerogel is in a three-dimensional network structure formed by graphene sheets. Particles of the Prussian-blue complexes are nano-scaled and attach to the graphene sheets. The preparation method of the composite aerogel includes adding metallic cyanide in graphene oxide suspension, allowing for dispersion to obtain suspension A, dissolving metal salt in aqueous solution containing reductant to obtain solution B, ultrasonically mixing the suspension A and the solution B, allowing for standing, and drying to obtain the composite aerogel. The composite aerogel is large in specific surface area and low in density and is highly conductive. The preparation method of the composite aerogel is simple to operate, low in cost and applicable to large-scale industrial production. The composite aerogel has excellent hydrogen storage performance, hydrogen peroxide catalytic reduction and electrochromic property.

Description

technical field [0001] The invention relates to a graphene / Prussian blue complex composite airgel, a preparation method and an application thereof, and belongs to the field of nanomaterial application. Background technique [0002] Graphene is a carbon atom with sp 2 The hybrid orbitals form a hexagonal shape, and a two-dimensional material with a thickness of only one carbon atom is currently the thinnest and hardest material in the world. Compared with other carbon materials (such as graphite, carbon nanotubes, etc.), graphene has better electrical conductivity (10 3 ~10 4 S m -1 ), large specific surface area (about 2630m 2 g -1 ), higher Young's modulus (about 1100GPa) and thermal conductivity (about 5000W m -1 K -1 ). In recent years, the research on graphene as energy storage, catalytic material and related devices has gradually deepened. However, due to the strong π-π interaction, graphene sheets are easy to pile up, resulting in performance degradation. To ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/00B01J20/20B01J20/30B01J27/26C09K9/00G01N27/30
CPCY02C10/08Y02C20/40
Inventor 张学同陈亮
Owner 陶丽
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