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Compound electrode containing graphene and metallic organic framework and preparation method thereof

A metal-organic framework and composite electrode technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of low conductivity of MOFs and limited anode materials, and achieve stable structure, good conductivity, and good stability

Inactive Publication Date: 2018-02-23
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the low electrical conductivity of MOFs prepared by conventional methods, its use as anode materials for BES is limited.

Method used

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  • Compound electrode containing graphene and metallic organic framework and preparation method thereof
  • Compound electrode containing graphene and metallic organic framework and preparation method thereof
  • Compound electrode containing graphene and metallic organic framework and preparation method thereof

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preparation example Construction

[0029] A preparation method of a composite electrode containing graphene and a metal organic framework, comprising the following steps:

[0030] 1) Pretreatment of the graphite plate: the graphite plate is soaked in acid, alkali, and washed;

[0031] 2) Preparation of graphene by anodic oxidation peeling: two graphite plates are taken as cathode and anode respectively, electrolyzed in ammonium sulfate solution, and the anode obtains a graphite plate with graphene on the surface;

[0032] 3) Modification of graphene: immerse the graphite plate containing graphene on the surface in the aqueous solution of NaOH and chloroacetic acid, fully react to obtain the graphite plate containing carboxyl-modified graphene on the surface;

[0033] 4) Preparation of metal-organic framework: The graphite plate containing carboxyl-modified graphene on the surface is immersed in a DMF solution of ferric nitrate and terephthalic acid, and fully reacted to obtain a composite electrode containing g...

Embodiment 1

[0044] A preparation method of a composite electrode containing graphene and a metal organic framework, comprising the following steps:

[0045] 1) Pretreatment of the graphite plate: Soak the graphite plate with a specification of 1cm×2cm×0.5cm in 1mol / L HCl solution for 10min, wash it with deionized water for 3 times, then soak it in 1mol / L NaOH solution for 1h, Wash 3 times with deionized water;

[0046] 2) Preparation of graphene by anodic oxidation peeling: take two graphite plates as cathode and anode respectively, apply a direct current of 12V, perform electrolysis in 1mol / L ammonium sulfate solution, electrolyze for 20min, and obtain a graphite plate with graphene on the surface at the anode;

[0047] 3) Modification of graphene: immerse the graphite plate containing graphene on the surface into an aqueous solution of NaOH and chloroacetic acid (the mass ratio of NaOH, chloroacetic acid, and water is 1:0.8:20), and ultrasonicate for 3 hours to obtain a modified surface...

Embodiment 2

[0056] A preparation method of a composite electrode containing graphene and a metal organic framework, comprising the following steps:

[0057] 1) Pretreatment of the graphite plate: Soak the graphite plate with a specification of 1cm×2cm×0.5cm in 0.8mol / L HCl solution for 20min, wash it twice with deionized water, and then soak it in 1.2mol / L NaOH solution 1h, washed 3 times with deionized water;

[0058] 2) Preparation of graphene by anodic oxidation peeling: take two graphite plates as cathode and anode respectively, apply a direct current of 15V, perform electrolysis in 1mol / L ammonium sulfate solution, electrolyze for 10min, and obtain a graphite plate with graphene on the surface at the anode;

[0059] 3) Modification of graphene: immerse the graphite plate containing graphene on the surface into an aqueous solution of NaOH and chloroacetic acid (the mass ratio of NaOH, chloroacetic acid, and water is 1:0.5:25), and ultrasonically for 4 hours to obtain a modified surfac...

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Abstract

The invention discloses a compound electrode containing graphene and metallic organic framework and a preparation method thereof. The preparation method for the compound electrode comprises the following steps: 1) pre-treating a graphite plate; 2) preparing graphene by anodizing and peeling; 3) modifying graphene; 4) preparing the metallic organic framework. The compound electrode containing graphene and metallic organic framework disclosed by the invention has the advantages of large specific surface area, low resistance, structure stability, and the like, fully utilizes the advantage of large specific surface area of the graphene and the metallic organic framework, overcomes the defect of low electrical conductivity of the metallic organic framework and fully utilizes the advantages of the graphene and the metallic organic framework. The compound electrode can be used as an anode of a bioelectrochemical system.

Description

technical field [0001] The invention relates to a composite electrode containing graphene and a metal organic framework and a preparation method thereof. Background technique [0002] Bio-electrochemical system (Bio-electrochemical system, BES) is a new type of device that can simultaneously treat wastewater and produce electricity. It shows a good application prospect. However, the current BES has the defect of low output power, which limits its application in production. Modification of the electrode, or the use of three-dimensional electrodes to increase the surface area of ​​the electrode is the main way to increase the output power of the BES. [0003] Graphene is often used as an anode modification material due to its large specific surface area and excellent electrical and thermal conductivity. Studies have shown that the use of graphene to modify the electrode can significantly improve the overall performance of BES, but because graphene is generally bonded to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/96
CPCH01M4/86H01M4/96Y02E60/50
Inventor 唐家桓王亚军李翔周顺桂
Owner FUJIAN AGRI & FORESTRY UNIV
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