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Aminated Fe3O4@MCM-41 nanoparticles and application thereof in graphite felt anode for microbial fuel cell

A nanoparticle and amination technology, applied in biochemical fuel cells, battery electrodes, electrochemical biocombination treatment, etc., can solve problems such as poor energy conversion efficiency, low MFC power density, and slow electron transfer

Active Publication Date: 2020-07-28
SHANDONG JIANZHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Traditional MFCs have low power density and poor energy conversion efficiency due to slow electron transfer between bacteria and electrodes

Method used

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  • Aminated Fe3O4@MCM-41 nanoparticles and application thereof in graphite felt anode for microbial fuel cell
  • Aminated Fe3O4@MCM-41 nanoparticles and application thereof in graphite felt anode for microbial fuel cell
  • Aminated Fe3O4@MCM-41 nanoparticles and application thereof in graphite felt anode for microbial fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1, this example provides a method for preparing aminated Fe3O4@MCM-41 nanoparticles

[0039]Ethylene glycol (200 mL), FeCl3·6H2O (6.4 g), SDS (3.0 g) and sodium acetate (16 g) were mixed, stirred at room temperature for 30 minutes, and poured into a Teflon bottle. After heating at 200°C for 8 hours, a solid sample was collected to obtain Fe3O4 particles. These Fe3O4 particles (0.2 g) were then dispersed in ethanol (40 mL), and the particles were dispersed by ultrasonic vibration. The following reagents were added sequentially, including ethanol (40 mL), deionized water (20 mL), concentrated ammonia (1.0 mL) and ethyl orthosilicate TEOS (0.2 g). The cloudy solution was stirred at room temperature for 6 hours, and then the solid product was washed with deionized water to obtain silica cores. Ethanol (60mL), deionized water (80mL), cetyltrimethylammonium bromide CTAB (0.30g), concentrated ammonia (1.0mL) and tetraethyl orthosilicate (TEOS) (0.8g), followed by Th...

Embodiment 2

[0042] Example 2 The preparation method of graphite felt anode for microbial battery in this example

[0043] The graphite felt was cut into a rectangle (thickness 2mm) of 1.5cm×1.0cm, and washed with 1mol / L HCl, 1mol / LNaOH, 3% H2O2, acetone, and deionized water at 50°C. Let it dry for later use. Fix the graphite rod on one side of the graphite felt with conductive silver glue, seal and fix it with epoxy resin glue, and dry at room temperature to ensure that the effective area of ​​the graphite felt is 1.0cm×1.0cm.

[0044] Accurately weigh Fe3O4@MCM-41-NH2 and washed and dried MWCNT-COOH according to the mass ratio of 3:7, and grind them in a mortar to mix the two evenly, and due to the hydrogen bond between the amino group and the carboxyl group , the two can be combined into Fe3O4@MCM-41 / MWCNT nanocomposites. According to the proportion of dispersing 10mg of the mixture in 1mL of 1% Nafion / ethanol solution, ultrasonically disperse evenly, drop every 500 μL on 1cm2 graphit...

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Abstract

The invention belongs to the technical field of microbial battery application, and particularly relates to aminated magnetic core-shell Fe3O4@MCM-41 nanoparticles and application thereof in a graphitefelt anode for a microbial fuel cell. The Fe3O4@MCM-41 / MWCNT modified graphite felt electrode prepared by the preparation method disclosed by the invention is large in specific surface area, and theadhesion amount of microorganisms can be increased when the Fe3O4@MCM-41 / MWCNT modified graphite felt electrode is applied to MFC; the Fe3O4@MCM-41 / MWCNT modified graphite felt electrode has relatively good oxidation-reduction property, and when the Fe3O4@MCM-41 / MWCNT modified graphite felt electrode is applied to an anode of an MFC, an oxidation-reduction reaction is easier to cause on the anode,so that the wastewater treatment efficiency of the MFC can be improved. The Fe3O4@MCM-41 / MWCNT modified graphite felt anode is relatively low in resistance and has relatively good electrochemical performance. When the Fe3O4@MCM-41 / MWCNT modified graphite felt electrode is applied to the anode of the MFC, the internal resistance of the MFC can be reduced, and the power density (2289 mW.m <-2 >) and the COD removal rate (90%) of the MFC can be improved.

Description

technical field [0001] The invention belongs to the technical field of microbial battery applications, and in particular relates to an aminated Fe3O4@MCM-41 nanoparticle and its application in a graphite felt anode of a microbial fuel cell. Background technique [0002] Microbial fuel cell (MFC) is a promising green energy source. Although MFC has many advantages, the power of fuel cell is still low, which limits its application in the energy production industry. [0003] Anode material, like cathode and electrolyte, is one of the key factors affecting the energy conversion of MFC. In the process of MFC power generation, because the electron transfer process from microorganisms to the anode is relatively slow, it is usually necessary to use an electron mediator to achieve fast electron transfer. Mediators such as 2-hydroxy-1,4-naphthoquinone (HNQ) or thionine are often used as electron shuttle agents to facilitate electron transfer. These types of MFCs are called mediated ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88H01M4/96H01M8/16C02F3/00B82Y40/00
CPCH01M4/86H01M4/8878H01M4/96H01M8/16C02F3/005B82Y40/00H01M2004/8684Y02E60/50
Inventor 李雪梅朱艳艳魏小锋赛东舜成文清韩泰森东玉洁
Owner SHANDONG JIANZHU UNIV
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