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Application of a 3D Hierarchical Porous Graphene/Polypyrrole Composite Material

A composite material and graphene technology, applied in nanotechnology for materials and surface science, organic compound/hydride/coordination complex catalyst, biochemical fuel cell, etc., can solve the problem of weak microbial affinity, poor electron transfer, Low biomass concentration and other issues, to achieve the effects of easy colonization, low charge transfer resistance, and large specific surface area

Active Publication Date: 2022-02-08
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention is to solve the technical problems of low biomass concentration, poor electron transfer, and weak microbial affinity in the current bioelectrochemical system, and provides an application of a three-dimensional multi-level hole graphene / polypyrrole composite material

Method used

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  • Application of a 3D Hierarchical Porous Graphene/Polypyrrole Composite Material
  • Application of a 3D Hierarchical Porous Graphene/Polypyrrole Composite Material
  • Application of a 3D Hierarchical Porous Graphene/Polypyrrole Composite Material

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specific Embodiment approach 1

[0026] Specific implementation mode one: the present implementation mode is a kind of preparation method of the graphene / polypyrrole composite material of three-dimensional multilevel hole, specifically is carried out according to the following steps:

[0027] 1. Add the graphene oxide into the citric acid-sodium citrate buffer solution, and ultrasonicate for 3h to 3.5h to obtain a graphene oxide colloidal suspension with a concentration of 0.5g / L to 0.6g / L; the citric acid- The pH of the sodium citrate buffer solution is 3.8 to 4.2;

[0028] 2. Add pyrrole monomer to the graphene oxide colloidal suspension in step 1 to obtain a mixed solution, then use a glassy carbon electrode as a working electrode on an electrochemical workstation, a saturated Ag / AgCl electrode as a reference electrode, and a Pt mesh as For the counter electrode, use the mixed solution as the electrolyte, and conduct cyclic voltammetry deposition for 20 to 22 cycles. The scanning range of cyclic voltammetr...

specific Embodiment approach 2

[0029] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the pH of the citric acid-sodium citrate buffer solution described in step 1 is 4. Others are the same as the first embodiment.

specific Embodiment approach 3

[0030] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the electrochemical workstation described in step 2 is CHI660C. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to an application of a graphene / polypyrrole composite material with three-dimensional multilevel holes, which relates to an application of a graphene composite material. The invention aims to solve the technical problems of low biomass concentration, poor electron transfer and weak microbial affinity in the current bioelectrochemical system. The present invention: 1. preparation of graphene oxide colloidal suspension; 2. cyclic voltammetry deposition. The three-dimensional multi-level porous graphene / polypyrrole composite material of the present invention is used as a bioelectrode in a bioelectrochemical system. The graphene / polypyrrole composite material with three-dimensional multi-level holes prepared by the invention has an open porous three-dimensional interconnected conductive scaffold and has a relatively high surface roughness, which is beneficial to the colonization of microorganisms and the transfer of extracellular electrons to electrodes. The graphene / polypyrrole composite material with three-dimensional multi-level holes of the present invention has a sandwich structure, wherein the graphene layer is protected by the polypyrrole layer, which facilitates colonization of microorganisms.

Description

technical field [0001] The invention relates to the application of a graphene composite material. Background technique [0002] Bioelectrochemical systems (BESs) are devices that utilize microorganisms to catalyze the oxidation of organic pollutants for power generation (microbial fuel cells (MFCs)) or hydrogen production (microbial electrolyzers), and are ideal platforms for simultaneous wastewater treatment and energy recovery. The bioelectrode (bioanode or biocathode) is a central component that determines cost and system performance. Although remarkable progress has been made in research from non-porous body electrodes to fiber-based electrodes, particle electrodes, and monolithic porous electrodes, low bacterial load on electrodes and slow extracellular electron transfer (EET) efficiency between bacteria and electrodes remain It is the main bottleneck hindering the practical application of BESs. [0003] Carbon-based materials, such as carbon cloth, carbon paper, carb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/06B01J35/10H01M4/90H01M8/16B82Y30/00B82Y40/00
CPCH01M4/9008H01M4/9083H01M8/16B82Y30/00B82Y40/00B01J31/069B01J35/1004Y02E60/50
Inventor 杨利明刘光珍罗胜联王爱杰
Owner NANCHANG HANGKONG UNIVERSITY
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