Graphene-metal organic framework composite material, and preparation method and application thereof

A technology of metal-organic frameworks and composite materials, which is applied in the field of graphene-metal-organic framework composites and their preparation, can solve the problem of reducing the stability and recycling performance of composite materials, difficult to control the structure of composite materials, and limiting the conductivity of graphene and other problems, to achieve the effect of improving the conductivity, improving the capacitance performance, and improving the uniformity of properties

Active Publication Date: 2018-04-03
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the preparation of graphene-MOF composites, the method of simple hybrid co-growth is mainly used at present, which separates and disperses the graphene sheets in the metal-organic framework, and the metal-organic framework is still in the micron-scale In the presence of powder, the graphene sheets are isolated from each other, and it is difficult to control the structure of the composite material, which not only limits the excellent electrical conductivity of graphene, b

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  • Graphene-metal organic framework composite material, and preparation method and application thereof
  • Graphene-metal organic framework composite material, and preparation method and application thereof
  • Graphene-metal organic framework composite material, and preparation method and application thereof

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Embodiment 1

[0047] A graphene-metal organic framework composite material, including three-dimensional porous graphene and a metal organic framework compound Cu-BTC, Cu-BTC uniformly grows in the internal channel structure of the three-dimensional porous graphene.

[0048] In this embodiment, the mass ratio of Cu-BTC to three-dimensional porous graphene is 12:1.

[0049] In this embodiment, the graphene-metal organic framework composite material is a bulk structure.

[0050] A kind of preparation method of the graphene-metal organic framework composite material of above-mentioned present embodiment, comprises the following steps:

[0051] (1) Preparation of three-dimensional porous graphene: Take 100 mg of graphene oxide solid and put it into 20 mL of pure water, and ultrasonically disperse to obtain a uniform dispersion; transfer the dispersion into a 50 mL reactor, and react at 180 ° C for 18 h, that is The three-dimensional porous graphene hydrogel is obtained, and the graphene hydroge...

Embodiment 2

[0064] A graphene-metal organic framework composite material, including three-dimensional porous graphene and a metal organic framework compound Cu-BTC, Cu-BTC uniformly grows in the internal channel structure of the three-dimensional porous graphene.

[0065] In this embodiment, the mass ratio of Cu-BTC to three-dimensional porous graphene is 14:1.

[0066] In this embodiment, the graphene-metal organic framework composite material is a bulk structure.

[0067] A kind of preparation method of the graphene-metal organic framework composite material of above-mentioned present embodiment, comprises the following steps:

[0068] (1) Preparation of three-dimensional porous graphene: put 40 mg of graphene oxide solid prepared in Example 1 into 20 mL of pure water, and ultrasonically disperse to obtain a uniform dispersion; After reacting at high temperature for 18 hours, a three-dimensional porous graphene hydrogel is obtained, and the graphene hydrogel is freeze-dried to obtain a...

Embodiment 3

[0073] A graphene-metal organic framework composite material, including three-dimensional porous graphene and a metal organic framework compound Cu-BTC, Cu-BTC uniformly grows in the internal channel structure of the three-dimensional porous graphene.

[0074] In this embodiment, the mass ratio of Cu-BTC to three-dimensional porous graphene is 10:1.

[0075] In this embodiment, the graphene-metal organic framework composite material is a bulk structure.

[0076] A kind of preparation method of the graphene-metal organic framework composite material of above-mentioned present embodiment, comprises the following steps:

[0077] (1) Preparation of three-dimensional porous graphene: put 200 mg of graphene oxide solid prepared in Example 1 into 20 mL of pure water, and ultrasonically disperse to obtain a uniform dispersion; After reacting at high temperature for 18 hours, a three-dimensional porous graphene hydrogel is obtained, and the graphene hydrogel is freeze-dried to obtain ...

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Abstract

The invention discloses a graphene-metal organic framework composite material, and a preparation method and application thereof. The composite material includes graphene and a metal organic frameworkcompound. The graphene is three-dimensional porous graphene. The metal organic framework compound is uniformly grown in an internal pore structure of the three-dimensional porous graphene. The preparation method includes the steps of (1) preparing a three-dimensional porous graphene aerogel; (2) preparing a three-dimensional porous graphene aerogel containing a metal organic framework material precursor solution; and (3) preparing a graphene-metal organic framework composite material. The application includes applications as electrode materials, adsorbents, or catalysts. The graphene-metal organic framework composite material has the advantages of good conductivity, good capacitance performance, uniform properties, stable structure, high cycle service life, and the like. The preparation method is simple in process and low in cost, and can prepare a graphene-metal organic framework composite material with the controllable shape and pore structure and excellent product performance.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a graphene-metal organic framework composite material and its preparation method and application. Background technique [0002] Supercapacitor, also known as electrochemical capacitor, is a new type of energy storage device with performance between secondary batteries and traditional capacitors. It has higher power density than batteries, and higher specific capacitance and energy density than traditional capacitors. It has the advantages of long cycle life, high reversibility, and no pollution to the environment. In particular, it has a short charging time and can be applied to energy storage devices, power supply systems, and many electronic devices. According to different energy storage mechanisms, supercapacitors are mainly divided into two categories: one is electric double layer capacitors (EDLCs) with carbon materials as electrode materials, which s...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/26H01G11/30H01G11/36H01G11/48H01G11/86
CPCH01G11/24H01G11/26H01G11/30H01G11/36H01G11/48H01G11/86Y02E60/13
Inventor 陶呈安张毅王芳黄坚李玉姣邹晓蓉朱慧王建方
Owner NAT UNIV OF DEFENSE TECH
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