Graphene/metal oxide hybrid aerogel, preparation method and applications thereof

A graphene, oxide technology, applied in chemical instruments and methods, chemical/physical processes, electrical components, etc., can solve problems such as inconvenient recycling

Active Publication Date: 2013-02-27
陶丽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is difficult to separate enzymes or cells from the re

Method used

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  • Graphene/metal oxide hybrid aerogel, preparation method and applications thereof
  • Graphene/metal oxide hybrid aerogel, preparation method and applications thereof
  • Graphene/metal oxide hybrid aerogel, preparation method and applications thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0062] 1) Take 5mL of graphene oxide organic solution with a concentration of 1mg / mL, add 0.04gFeCl 3 ·6H 2 O, ultrasonically disperse until a homogeneous suspension is formed 1. Wherein the organic solvent is ethanol.

[0063] 2) Add 784 μL of epichlorohydrin to suspension 1, and then ultrasonically disperse until a uniform suspension 2 is formed, and then stand at 20°C for 48 h to obtain a uniform non-flowing hybrid wet gel. Among them, epichlorohydrin and Fe 3+ The molar ratio is 10:1.

[0064] 3) Add ethanol to the hybrid wet gel, pour out the ethanol after soaking for 10 hours, and repeat 5 times to obtain the alcohol gel. 2 Desiccator drying 24h, supercritical CO 2 The critical temperature of drying is 31.05 °C, and the critical pressure is 7.38 Pa, resulting in graphene oxide / FeOx hybrid airgel.

[0065] 4) Carbonize the obtained hybrid airgel in an argon-protected high-temperature carbonization furnace (produced by Tianjin Zhonghuan Company) for 20 hours, the car...

Embodiment 2

[0068] 1) Take 5mL of graphene oxide organic solution with a concentration of 6mg / mL, add 0.40gFe(NO 3 ) 3 9H 2 O, ultrasonically disperse until a homogeneous suspension is formed 1. Wherein the organic solvent is DMF.

[0069] 2) Add 784 μL of propylene oxide to suspension 1, and then ultrasonically disperse until a uniform suspension 2 is formed, and then stand at 50°C for 24 h to obtain a uniform non-flowing hybrid wet gel. Among them, propylene oxide and Fe 3+ The molar ratio is 10:1.

[0070] 3) Add acetone to the hybrid wet gel, pour out the ethanol after soaking for 5 hours, and repeat 8 times to obtain an alcohol gel, using supercritical CO produced by SFT Company of the United States 2 Desiccator drying 3h, supercritical CO 2 The critical temperature of drying is 31.05 °C, and the critical pressure is 7.38 Pa, resulting in graphene oxide / FeOx hybrid airgel.

[0071] 4) Carbonize the obtained hybrid airgel in an argon-protected high-temperature carbonization fur...

Embodiment 3

[0073] 1) Take 5mL of graphene oxide organic solution with a concentration of 12mg / mL, add 1.20gFe 2 (SO4) 3 , sonicate until a homogeneous suspension is formed. Wherein the organic solvent is isopropanol.

[0074] 2) Add 3920 μL of propylene oxide to suspension 1, and then ultrasonically disperse until a uniform suspension 2 is formed, and then stand at 80°C for 2 h to obtain a uniform non-flowing hybrid wet gel. Among them, propylene oxide and Fe 3+The molar ratio is 50:1.

[0075] 3) Add ethanol to the hybrid wet gel, pour out the ethanol after soaking for 10 hours, repeat 4 times, add water to the hybrid wet gel, pour out the water after soaking for 10 hours, and pour out the hybrid The dehumidified gel was frozen at -25°C for ≥30min, and then dried at 70°C for 30min to obtain an amorphous graphene oxide / FeOx hybrid aerogel; both freezing and drying processes were carried out under a vacuum of 10Pa .

[0076] 4) Carbonize the obtained hybrid airgel in an argon-protec...

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Abstract

The present invention relates a graphene/metal oxide hybrid aerogel, a preparation method and applications thereof, and belongs to the field of nanometer material applications. The hybrid aerogel comprises a graphene network and a metal oxide network, wherein the two networks are mutually wound to form a hybrid aerogel, and the metal oxide network is further a crystalline state. The hybrid aerogel preparation comprises: preparing a graphene oxide organic solution, adding a soluble metal salt and an epoxide to obtain a uniform non-flowing hybrid wet gel, and carrying out drying and charring to obtain the graphene/metal oxide hybrid aerogel. The hybrid aerogel can be used as an energy storage material, an electromagnetic shielding material, a biological enzyme catalysis carrier and a CO2 absorption material, and has wide applications.

Description

technical field [0001] The invention relates to a graphene / metal oxide hybrid airgel, a preparation method and an application thereof, belonging to the field of nanomaterial application. Background technique [0002] Graphene is currently the thinnest and hardest nanomaterial in the world. But also has many excellent physical and chemical properties. For example, the thermal conductivity of graphene is as high as 5300W / m K, which is higher than that of carbon nanotubes and diamonds, and its electron mobility exceeds 15000cm at room temperature. 2 / V·s is also higher than that of carbon nanotubes or silicon crystals, and the resistivity is only about 10 -6 Ω·cm, which is lower than copper or silver, and is currently the material with the smallest resistivity in the world. Perfect graphene has an ideal two-dimensional crystal structure, which can be regarded as a layer of exfoliated graphite sheets. Each carbon atom is connected to three other carbon atoms through strong σ ...

Claims

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Application Information

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IPC IPC(8): B01J13/00B01J20/20H01G11/30H01M4/36C12N11/14
CPCY02E60/12Y02C10/08Y02E60/13Y02C20/40Y02E60/10
Inventor 张学同陈亮
Owner 陶丽
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