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Floating type double-oxygen-source gas diffusion electrode device and application

A gas diffusion electrode and floating technology, applied in the field of electrochemical applications, can solve the problems of low cost, large specific surface area, and high conductivity of carbon black, and achieve the effect of improving electrode stability, overcoming damage to the three-dimensional structure, and ensuring integrity

Active Publication Date: 2021-02-26
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it acts as a cathode material to generate H 2 o 2 The performance is not good, so it needs to be used in combination with other carbon materials. Commonly used carbon materials include carbon nanotubes, graphite, graphene, activated carbon, acetylene black, etc., among which carbon black is low in cost, high in conductivity, and large in specific surface area. It is widely used as electrode substrate or catalyst carrier in electrochemical system

Method used

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  • Floating type double-oxygen-source gas diffusion electrode device and application
  • Floating type double-oxygen-source gas diffusion electrode device and application
  • Floating type double-oxygen-source gas diffusion electrode device and application

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Embodiment 1

[0031] (1) Impurity removal pretreatment of nickel foam: Soak nickel foam in acetone solution for 20-50 minutes, remove the acetone solution, soak nickel foam in ethanol solution for 20-50 minutes, and then ultrasonically clean it with ionized water for 20-50 minutes. Remove the residual ethanol again, and finally put the nickel foam into a vacuum drying oven at a constant temperature of 60°C for 8 hours;

[0032] (2) Preparation of carbon black / polytetrafluoroethylene mixed solution: take ethanol water solution with a volume ratio of 1:1 and mix evenly, add carbon black and polytetrafluoroethylene at a concentration of 1mg / ml and 1.2mg / ml respectively, and stir while ultrasonically 30min, forming a uniform mixed solution;

[0033] (3) Carbon black / polytetrafluoroethylene / nickel foam three-dimensional gas diffusion electrode preparation: the nickel foam in the step of (1) with a diameter of 40mm and a thickness of 15mm is placed on the vacuum filter sand core filter head, and ...

Embodiment 2

[0037] Concrete preparation process and reaction device are with embodiment 1 (1) (2) (3) step, (4) step difference is that pH=3, degradation 400ml concentration is the amoxicillin waste water of 100mg / L, adds catalyst Fe 2+ Concentration is 0.3mM, such as Figure 6 According to the curve, the degradation efficiency of amoxicillin was 99% after 25 min.

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Abstract

The invention discloses a floating type double-oxygen-source gas diffusion electrode device and application. The device can efficiently generate hydrogen peroxide and be applied to an electro-Fenton system to efficiently degrade typical antibiotics, and belongs to the technical field of electrochemical application. A floating type contact reaction device is adopted, aeration is not needed, H2O2 can be efficiently generated by the cathode through double oxygen sources (oxygen generated by the anode and oxygen in air), the cathode is a carbon black / polytetrafluoroethylene / foamed nickel three-dimensional gas diffusion electrode and is prepared in a vacuum filtration mode, and the anode is an MMO electrode. In addition, the device has the capacity of efficiently degrading high-concentration antibiotics under an electro-Fenton system, and has the excellent properties of stability, energy conservation, high efficiency and the like.

Description

technical field [0001] The invention belongs to the technical field of electrochemical applications, and relates to the design of a novel floating double oxygen source gas diffusion electrode device and the use of the device to efficiently generate hydrogen peroxide and apply it to an electro-Fenton system to efficiently degrade typical antibiotics. Background technique [0002] Electro-Fenton is the most widely applicable treatment method in the electrochemical advanced oxidation process (EAOPs), which is based on the in-situ generation of strong oxidants, such as hydroxyl radicals ( OH). The basic principle is that O 2 A two-electron reduction reaction occurs at the cathode to produce H 2 o 2 , H 2 o 2 with Fe 2+ The reaction generates OH, which reacts non-selectively with most organic substances, and even highly refractory compounds can be degraded. [0003] During the degradation of pollutants, H 2 o 2 The generation of it has a great influence on it, so it improv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/72C02F101/34C02F101/38
CPCC02F1/46109C02F1/4672C02F2001/46133C02F2001/46166C02F2101/34C02F2101/345C02F2101/38C02F2101/40C02F2305/026
Inventor 孙治荣吕佳静
Owner BEIJING UNIV OF TECH
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