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Preparation method and application of graphene/polypyrrole composite material with three-dimensional multi-stage pores

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

Active Publication Date: 2019-03-12
NANCHANG HANGKONG UNIVERSITY
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  • Application Information

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Problems solved by technology

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

Method used

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  • Preparation method and application of graphene/polypyrrole composite material with three-dimensional multi-stage pores
  • Preparation method and application of graphene/polypyrrole composite material with three-dimensional multi-stage pores
  • Preparation method and application of graphene/polypyrrole composite material with three-dimensional multi-stage pores

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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 a preparation method and application of a graphene composite material, in particular to a preparation method and application of a graphene / polypyrrole composite material withthree-dimensional multi-stage pores. The invention aims at solving the technical problems that the existing bioelectrochemical system is low in biomass concentration, poor in electron transfer and weak in microbial affinity. The preparation method comprises the steps of firstly, preparing a graphene oxide colloidal suspension liquid; secondly, carrying out cyclic voltammetry deposition. The graphene / polypyrrole composite material with the three-dimensional multi-stage pores is applied to a bioelectrochemical system as a biological electrode. The graphene / polypyrrole composite material, prepared by the method, with the three-dimensional multi-stage pores is provided with an open porous three-dimensional interconnected conductive support, and is higher in surface roughness, thus being beneficial to microbial colonization and transfer of extracellular electron to the electrode. The graphene / polypyrrole composite material with the three-dimensional multi-stage pores has a sandwich structure in which a graphene layer is protected by a polypyrrole layer, so that the colonization of microorganisms is facilitated.

Description

technical field [0001] The invention relates to a preparation method and 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 clot...

Claims

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Application Information

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IPC IPC(8): B01J31/06B01J35/10H01M4/90H01M8/16B82Y30/00B82Y40/00
CPCH01M4/9008H01M4/9083H01M8/16B82Y30/00B82Y40/00B01J31/069B01J35/61Y02E60/50
Inventor 杨利明刘光珍罗胜联王爱杰
Owner NANCHANG HANGKONG UNIVERSITY
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