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Nanometer iron oxide modified carbon-based electrode and macroscopic-size large-scale preparation method and application thereof

A technology of nano-iron oxides and iron oxides, applied in chemical instruments and methods, battery electrodes, biochemical fuel cells, etc., can solve the problems of low electron transfer efficiency between electrodes and microorganisms, and limited performance of microbial electrochemical systems, achieving Enhance the effect of pollutant removal, improve electrochemical efficiency, and improve the effect of electrochemical performance

Pending Publication Date: 2022-07-22
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the problems existing in the above-mentioned prior art, the purpose of the present invention is to design and provide a method for large-scale preparation of iron oxide modified carbon-based electrodes, and apply it to the performance enhancement of microbial electrochemical systems, solving the problems of microbial electrochemical systems. The performance of the system is limited by the inefficiency of electron transfer between electrodes and microorganisms, realizing the application of enhanced microbial electrochemical systems in water ecological restoration

Method used

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  • Nanometer iron oxide modified carbon-based electrode and macroscopic-size large-scale preparation method and application thereof
  • Nanometer iron oxide modified carbon-based electrode and macroscopic-size large-scale preparation method and application thereof
  • Nanometer iron oxide modified carbon-based electrode and macroscopic-size large-scale preparation method and application thereof

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Embodiment 1

[0032] A macro-scale large-scale preparation method of nano-iron oxide modified carbon-based electrode is completed according to the following steps:

[0033] Add FeCl to the solvent 3 ·6H 2 O and polyvinylpyrrolidone (PVPK30) are fully dissolved to obtain iron oxide precursor solution;

[0034] The concentration of the iron source (calculated as iron ions) in the iron oxide precursor solution is 100 mM;

[0035] The concentration of the carbon source in the iron oxide precursor solution is 20 g / L;

[0036] 2. High temperature heat treatment of electrodes

[0037] After the carbon cloth is fully washed with 10% hydrochloric acid and deionized water in sequence, it is fully soaked in the precursor solution prepared in step (1) and fully dried. The impregnated and dried carbon cloth is wrapped and sealed with aluminum foil paper, placed in a muffle furnace, and subjected to heat treatment to obtain nano-iron oxide modified carbon cloth, denoted as FeCl 3 - Carbon cloth.

...

Embodiment 2

[0041]A macro-scale large-scale preparation method of nano-iron oxide modified carbon-based electrode is completed according to the following steps:

[0042] Add FeCl to the solvent 3 ·6H 2 O and polyvinylpyrrolidone (PVPK30) are fully dissolved to obtain iron oxide precursor solution;

[0043] The concentration of the iron source (calculated as iron ions) in the iron oxide precursor solution is 100 mM;

[0044] The concentration of the carbon source in the iron oxide precursor solution is 20 g / L;

[0045] 2. High temperature heat treatment of electrodes

[0046] After the carbon brush is fully cleaned with 10% hydrochloric acid and deionized water in sequence, it is fully soaked in the precursor solution prepared in step (1) and fully dried. The impregnated and dried carbon brush is wrapped and sealed with aluminum foil paper, placed in a muffle furnace, and heat treated to obtain a carbon brush modified by nano-iron oxide, denoted as FeCl 3 - Carbon brushes.

[0047] T...

Embodiment 3

[0050] A macro-scale large-scale preparation method of nano-iron oxide modified carbon-based electrode is completed according to the following steps:

[0051] Add Fe(NO) to the solvent 3 ) 3 ·9H 2 O and polyvinylpyrrolidone (PVPK30) are fully dissolved to obtain iron oxide precursor solution;

[0052] The concentration of the iron source (calculated as iron ions) in the iron oxide precursor solution is 100 mM;

[0053] The concentration of the carbon source in the iron oxide precursor solution is 20 g / L;

[0054] 2. High temperature heat treatment of electrodes

[0055] After the carbon cloth is fully washed with 10% hydrochloric acid and deionized water in sequence, it is fully soaked in the precursor solution prepared in step (1) and fully dried. The impregnated and dried carbon cloth is wrapped and sealed with aluminum foil paper, placed in a muffle furnace, and subjected to heat treatment to obtain nano-iron oxide modified carbon cloth, denoted as Fe(NO 3 ) 3 - Carb...

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Abstract

The invention discloses a nano iron oxide modified carbon-based electrode as well as a macroscopic-size large-scale preparation method and application thereof, and belongs to the technical field of microbial electrochemistry. The macroscopic-size large-scale preparation method comprises the following steps: (1) weighing a carbon source and an iron source, and dissolving the carbon source and the iron source in deionized water to obtain an iron oxide precursor solution; and (2) taking a carbon-based electrode, sequentially cleaning the carbon-based electrode with acid and deionized water, naturally airing the carbon-based electrode, infiltrating the carbon-based electrode with an iron oxide precursor solution, drying the carbon-based electrode, wrapping and sealing the carbon-based electrode with aluminum-foil paper, and performing heat treatment on the carbon-based electrode in a muffle furnace to obtain the nano iron oxide modified carbon-based electrode. The iron oxide nano material is modified on the surface of the carbon-based electrode, the extracellular electron transfer efficiency of the electrode and microorganisms is improved, the preparation process is simple, iron oxide and the surface of the electrode are tightly combined under the action of a carbon source under the condition of high-temperature pyrolysis, the electrode with a stable structure is obtained, the electrochemical performance of microorganism electrochemistry is improved, and the application prospect is wide. Enrichment of functional microorganisms is promoted, and the removal effect of pollutants in a polluted water body is enhanced.

Description

technical field [0001] The invention belongs to the technical field of microbial electrochemistry, and in particular relates to a carbon-based electrode modified by nano-iron oxide and a large-scale preparation method and application of the same. Background technique [0002] Microbial Electrochemical Technology (MET), as a new type of water treatment technology, shows great potential in water ecological restoration by virtue of its energy self-sustaining operation characteristics and flexible construction mode. At present, the Microbial Electrochemical System (MES) is difficult to be applied on a large scale in practical engineering, mainly due to the low efficiency of electron transfer between electrodes and microorganisms, resulting in a relatively low remediation efficiency for the sewage. Low. Existing studies have shown that the modification of electrode materials with some nanomaterials can promote the enrichment of electroactive microorganisms and significantly impr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C02F3/34C02F3/32H01M4/96H01M4/86H01M4/88H01M8/16C02F101/34C02F101/36C02F101/38
CPCC02F3/005C02F3/34C02F3/32H01M4/96H01M4/8647H01M4/88H01M8/16C02F2101/36C02F2101/38C02F2101/34
Inventor 冯玉杰李增刘国宏邱叶李健楠廖梦龙
Owner HARBIN INST OF TECH
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