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Microbial electrolysis cell (MEC) modified biological cathode preparation method and application thereof

A microbial electrolysis cell and biocathode technology, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of low hydrogen production level of biocathode, low hydrogen production efficiency of biocathode, low microbial catalytic performance, etc., and achieve low cost, The effect of easy operation and simple preparation method

Inactive Publication Date: 2013-11-27
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are also deficiencies such as poor electrical conductivity and low microbial catalytic performance that lead to low hydrogen production levels in biocathode.
Therefore, the above-mentioned noble metal Pt cathode and non-noble metal cathode have poor catalytic stability and the biocathode has low hydrogen production efficiency, so it is of great significance to try to develop MEC modified biocathode

Method used

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  • Microbial electrolysis cell (MEC) modified biological cathode preparation method and application thereof
  • Microbial electrolysis cell (MEC) modified biological cathode preparation method and application thereof
  • Microbial electrolysis cell (MEC) modified biological cathode preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Step 1: Preparation of MWNT / Tourmaline / PANI Modified Electrode

[0040] Add 2 g of unpurified carbon nanotubes (MWNT) into 100 mL of nitric acid / sulfuric acid mixture (1:3, v / v), stir and react at 80 °C for 12 hours, filter the resulting black liquid, and wash with deionized water until neutral. properties, filtered and dried to obtain purified carbon nanotubes.

[0041] Mix 0.2 g of purified carbon nanotubes with 0.05 g of 8000-mesh black tourmaline powder, and ball mill for 30 min at 400 r / min to obtain a mixture with a mass ratio of carbon nanotubes to tourmaline of 2:1. To the mixture was added 1 mL of the surfactant dodecylbenzenesulfonic acid, 30 mL of concentrated HCl, and 70 mL of HO 2 O, ultrasonically stirred for 3 hours, transferred to 0-5°C ice bath to obtain mixed solution A; 0.6mL of aniline stored in 0-5°C ice bath after vacuum distillation was dissolved in 10mL of 1mol / L HCl solution , added to the above mixed solution A to obtain the mixed solution B;...

Embodiment 2

[0051] The difference from Example 1 is that in the first step, 0.2g of purified carbon nanotubes, 0.1g of 8000 mesh black tourmaline powder, 0.6mL of aniline and 1.5g of ammonium persulfate are used to obtain MWNT, tourmaline and PANI in a mass ratio of 24: 12:72 catalytic electrode. After acclimatization and film formation in MFC, it was used as MEC modified biocathode to conduct MEC hydrogen production test. When the applied voltage was 0.9V, the maximum current density was 189Am. -3 , COD removal rate 91.7%, hydrogen yield 1.53m 3 m 3 d -1 . The electrochemical performance test of the modified biocathode was carried out using a three-electrode test system, and the obtained results were as follows: Figure 4 shown.

Embodiment 3

[0053] The difference from Example 1 is that in the first step, 0.6g of purified carbon nanotubes, 0.15g of 8000 mesh black tourmaline powder, 0.2mL of aniline and 0.5g of ammonium persulfate are used to obtain MWNT, tourmaline and PANI in a mass ratio of 24: 6:8 catalytic electrode. After acclimation and film formation in MFC, it was used as a MEC modified biocathode to conduct MEC hydrogen production test. When the applied voltage was 0.9V, the maximum current density was 178Am. -3 , COD removal rate 91.2%, hydrogen yield 1.34m 3 m 3 d -1 . The electrochemical performance test of the modified biocathode was carried out using a three-electrode test system, and the obtained results were as follows: Figure 4 shown.

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Abstract

The invention discloses a microbial electrolysis cell (MEC) modified biological cathode preparation method and application thereof. The invention uses an MWNT (multi-walled nanotube) / tourmaline / PANI (polyaniline) composite electrode as a substrate to prepare the MEC modified biological cathode. The preparation method comprises the following steps: mixing MWNT and tourmaline powder by ball milling, adding a solvent, aniline and ammonium persulfate, stirring to react under ice bath conditions, washing, and drying to obtain an MWNT / tourmaline / PANI composite; mixing the composite with a binding agent and acetone to obtain an MWNT / tourmaline / PANI composite electrode, naturally drying in air to obtain an MFC anode, carrying out biofilm domestication by a conventional method, transferring to an MEC cathode, and finally constructing the MWNT / tourmaline / PANI modified biological cathode. The modified biological cathode prepared by the method disclosed by the invention has the functions of stimulating biological catalytic activity and chemically enhancing the biological catalytic hydrogen production, has the advantages of high conductivity and low cost, and provides technical support for implementing large-scale application of MEC synchronous wastewater treatment and hydrogen production.

Description

technical field [0001] The invention belongs to the technical field of new energy and new material application, and specifically relates to the application of carbon nanotube / tourmaline / polyaniline modified biological cathode in microbial electrolytic cell and its preparation method. Background technique [0002] With social progress and economic development, the global energy crisis and environmental pollution problems have become increasingly prominent, and it has become the trend of the times to meet human energy needs in a sustainable and environmentally friendly way without relying on fossil fuels. [0003] MEC is a new biohydrogen production technology developed in recent years. As a new bioprocessing technology that can biodegrade organic matter through the synergy of biology and electrochemistry, and can convert chemical energy into hydrogen energy, MEC has attracted more and more attention. more and more attention. Its basic working principle is that under the acti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90
CPCY02E60/50
Inventor 陈英文沈树宝蒋阳月徐源杨倩
Owner NANJING UNIV OF TECH
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