Preparation method of co-mof-go thin film for microbial fuel cell and its constructed MFCs

A fuel cell, microbial technology, applied in MFCs. It can solve problems such as reducing electrical conductivity, achieve good biocompatibility, promote contact, and improve MFC power yield.

Active Publication Date: 2022-02-08
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it should be noted that the temperature required for pyrolysis needs to be controlled within a certain range. According to the difference of each material, the optimal temperature required for pyrolysis is also different. If the pyrolysis temperature is too high, it will cause metal atoms Agglomerate each other to form larger metal clusters to reduce electrical conductivity

Method used

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  • Preparation method of co-mof-go thin film for microbial fuel cell and its constructed MFCs
  • Preparation method of co-mof-go thin film for microbial fuel cell and its constructed MFCs
  • Preparation method of co-mof-go thin film for microbial fuel cell and its constructed MFCs

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The preparation method of the Co-MOF-GO film that is used for microbial fuel cell in the present embodiment is carried out according to the following steps:

[0035] Step 1. Preparation of Co-MOF-GO nanoparticles: In a 50mL beaker, add 20ml of 2mg / ml GO aqueous solution, and add 0.35g of cobalt nitrate hexahydrate (Co(NO 3 )2 ·6H 2 O) and 5.05g dimethylimidazole (C4H6N2), under the condition of 300-600r / min speed magnetic stirring reaction for 3 hours, obtain the purple black solution, carry out centrifugation with 10000r / min speed, solid water centrifugation cleaning three times, then ethanol Centrifugal cleaning once, vacuum drying to obtain purple-black Co-MOF-GO nanoparticles;

[0036] Step 2. After vacuuming, nitrogen gas is introduced, and the temperature is raised from 20°C to 550°C at a rate of 5°C / min. The temperature is maintained at 550°C for 6 hours, and the temperature is lowered to room temperature at a rate of 5°C / min. Co- MOF-GO composite;

[0037] St...

Embodiment 2

[0039] Embodiment 2: The microbial fuel cell (MFCs) that adopts the Co-MOF-GO thin film construction that the preparation method described in Example 1 makes:

[0040] 1. Pretreatment of required materials:

[0041] Carbon brush pretreatment method: Put 10 carbon brushes with the carbon cloth fiber side down into a 0.5L beaker, then add 0.45L acetone, soak for 30min, take it out, put it directly into a large tube furnace, and then Sinter at 350°C for 30 minutes, cool down to room temperature naturally, take it out and put it in a 0.5L beaker, seal it with a parafilm, and set it aside.

[0042] Pretreatment method of Nafion membrane: 10×10cm 2 Divide the Nafion membrane into 9 parts on average, put the cut Nafion membrane into a 100mL beaker, add 100mL3% H 2 o 2 , placed in an oven, treated at 80°C for 30 minutes to remove organic impurities; put 100mL of 3% H 2 o 2 Pour it out, add 100mL of distilled water, put it in an oven, and treat it at 80°C for 30min; then pour out ...

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Abstract

The preparation method of the Co-MOF-GO thin film used for microbial fuel cells and the MFCs constructed thereof belong to the technical field of microbial fuel cells. The invention aims to solve the problems of high potential, low power, short cycle and the like existing in the current MFC anode. Co‑MOF‑GO thin film preparation method: 1. Add GO to water, mix well, add cobalt nitrate hexahydrate and dimethylimidazole in turn, magnetically stir, wash after centrifugation, and vacuum dry to obtain nanoparticles; 2. In an inert gas Heat it under heat preservation and lower it to room temperature; 3. Add isopropanol and Nafion solution to disperse evenly. 4. Apply to both sides of the carbon cloth and let it dry naturally. The constructed microbial electrolysis cells are H‑type dual-chamber MECs. The highest voltage of the MFCs of the present invention is 0.56V, the cycle is long, the COD removal rate reaches 79.195%±3.4766%, the Coulombic efficiency reaches 9.3151%±0.5416%, and the maximum power density is 2303mV / m 2 .

Description

technical field [0001] The invention belongs to the technical field of microbial fuel cells; in particular, it relates to a preparation method for Co-MOF-GO thin films used in microbial fuel cells and MFCs constructed thereof. Background technique [0002] Microbial Fuel Cell (MFC) is a device that uses microorganisms to directly convert chemical energy in organic matter into electrical energy. Its basic working principle is: in the anaerobic environment of the anode chamber, the organic matter decomposes under the action of microorganisms and releases electrons and protons. The circuit is transmitted to the cathode to form an electric current, and the proton is transmitted to the cathode through the proton exchange membrane, and the oxidant gets electrons at the cathode and is reduced and combined with the proton to form water. Microbial fuel cell (MFC) is a device that uses biomass energy. It uses bacteria as biocatalysts to generate electricity. It was first discovered i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/48H01M8/16
CPCH01M8/16H01M4/364H01M4/48Y02E60/50Y02E60/10
Inventor 刘丹青王瑞赵超越刘欣孙晓君
Owner HARBIN UNIV OF SCI & TECH
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