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Electrochemical assembly polypyrrole/manganese dioxide compound modified electrode and preparation method and application thereof

A technology of manganese dioxide and polypyrrole, which is applied in the field of bioelectrochemistry, can solve the problems of limited catalytic performance of amorphous manganese oxide, high price of Nafion glue, unfavorable industrial application, etc., to achieve enhanced power generation and degradation performance, and follow-up Effect of low processing cost and increased surface roughness

Inactive Publication Date: 2017-02-15
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation process of these methods is complicated, the commercial Nafion glue is expensive, and the catalytic performance of amorphous manganese oxide is limited, which is not conducive to industrial application.

Method used

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  • Electrochemical assembly polypyrrole/manganese dioxide compound modified electrode and preparation method and application thereof
  • Electrochemical assembly polypyrrole/manganese dioxide compound modified electrode and preparation method and application thereof
  • Electrochemical assembly polypyrrole/manganese dioxide compound modified electrode and preparation method and application thereof

Examples

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Embodiment 1

[0023] This example is used to illustrate the preparation process of the electrochemically assembled polypyrrole / β-manganese dioxide composite modified electrode. Ultrasonic dispersion of β-manganese dioxide with a mass of 500 mg in 50 mL of deionized water to obtain a uniform and stable dispersed aqueous solution of β-manganese dioxide; cut the graphite felt electrode into small pieces with a size of 2×2 cm, and put in 30% peroxide Soak in hydrogen solution, ultrasonic for 1 hour, wash the residual hydrogen peroxide on the surface of the graphite felt with enough deionized water, put it in an oven at 50°C and dry it for later use. Purify the pyrrole monomer by distillation under reduced pressure, add 0.10mol L to the dispersed β-manganese dioxide aqueous solution -1 Sodium perchlorate and 0.20mol L -1 The pyrrole monomer, stir well and set aside. The pretreated graphite felt electrode is used in the three-electrode system as the working electrode, the platinum sheet is used...

Embodiment 2

[0037] The difference between this embodiment and Example 1 is that the β-MnO 2 Change to α-MnO 2 or γ-MnO 2 The modified electrodes were prepared, and the electrodes showed excellent electricity generation and catalytic degradation performance.

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Abstract

The invention discloses an electrochemical assembly polypyrrole / manganese dioxide compound modified electrode and preparation method and application thereof. The preparation method includes: firstly, ultrasonically dispersing hydrothermally-synthesized nano-manganese oxide in a water solution; secondly, preparing mixed an electrolyte solution of a pyrrole monomer and manganese dioxide; finally adopting a three-electrode system, utilizing a potentiostatic method to polymerize pyrrole while a pyrrole polymer is subjected to catalytic oxidation through manganese dioxide to form a polypyrrole / manganese dioxide compound in one step, and allowing the polypyrrole / manganese dioxide compound to be attached to the surface of the graphite felt electrode. By the arrangement, surface roughness, electrochemical performance and electron transfer capability of the modified electrode are improved; when applied in an electrochemical system, the electrochemical assembly polypyrrole / manganese dioxide compound modified electrode is small in internal electrode resistance as compared with a traditional graphite felt, output power and coulombic efficiency are obviously improved, and removal rate of refractory pollutants is greatly increased.

Description

technical field [0001] The invention belongs to the technical field of bioelectrochemistry and relates to a modified electrode, in particular to an electrochemically assembled polypyrrole / manganese dioxide composite modified carbon-based material electrode and its preparation method and application in bioelectrochemical systems . Background technique [0002] Bioelectrochemical system (BES for short) is a fuel cell system that uses microorganisms as a catalyst to directly convert the chemical energy in bioavailable organic matter in wastewater into electrical energy. With its clean, environmentally friendly and renewable advantages, it has gradually become a new energy source. field and research hotspots in the field of environmental engineering. In bioelectrochemical systems, the material and structure of the anode directly affect the attachment of microorganisms, electron transfer, and oxidation of substrates. As a direct receiving device for microorganisms to degrade po...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/88
CPCH01M4/8652H01M4/8853Y02E60/50
Inventor 沈锦优陈丹王连军孙鹏翔江心白罗哲林晓璐张亚孙秀云李健生韩卫清
Owner NANJING UNIV OF SCI & TECH