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Porous carbon mixed carbon black roll electrode material and preparation method and application thereof

A technology of electrode material and porous carbon, which is applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., to achieve the effects of improving stability, increasing production, and increasing the degradation effect of organic matter

Inactive Publication Date: 2019-11-05
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it is of great significance to develop an electrode material mixed with porous carbon and carbon black to improve the electrocatalytic activity of the electro-Fenton cathode, but there is no report on the electrode material mixed with porous carbon and carbon black.

Method used

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  • Porous carbon mixed carbon black roll electrode material and preparation method and application thereof
  • Porous carbon mixed carbon black roll electrode material and preparation method and application thereof
  • Porous carbon mixed carbon black roll electrode material and preparation method and application thereof

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preparation example Construction

[0034] A kind of preparation method of the porous carbon mixed carbon black rolling electrode material effectively applied in the electric Fenton technology system of the present invention comprises the following steps,

[0035] Step 1, with 100~150ml ultrapure water or deionized water as solvent, Zn(NO 3 ) 2 ·6H 2 O and 2-methylimidazole are added, at this time Zn(NO 3 ) 2 ·6H 2 The concentration ratio of O and 2-methylimidazole is 74.4g / L:(114.03~159.64)g / L. After the compound reaction is complete through 200~500rpm magnetic stirring for 12~24h, use a high-speed centrifuge at 8000~10000rpm. Methanol was used as a cleaning agent to completely remove the residue of 2-methylimidazole, and centrifuged for 8-20 minutes to obtain the precursor of porous carbon;

[0036] Step 2, dry the precursor of porous carbon in a vacuum drying oven at 45-65 °C for 5-12 hours; put the dried precursor into a quartz boat, and pass an inert gas into a high-temperature tube furnace, such as N ...

Embodiment 1

[0043] A kind of preparation method of the porous carbon mixed carbon black rolling electrode material that the present invention is applied in the electric Fenton technology system comprises the following steps,

[0044] Step 1, with 100ml ultrapure water as solvent, Zn(NO 3 ) 2 ·6H 2 O and 2-methylimidazole are added, at this time Zn(NO 3 ) 2 ·6H 2 The concentration ratio of O and 2-methylimidazole is 74.4g / L:114.03g / L. After the compound reaction is complete by 200rpm magnetic stirring for 12h, use methanol as a cleaning agent at 8000rpm in a high-speed centrifuge to remove 2-methylimidazole The imidazole residues were completely removed, and centrifuged for 8 minutes to obtain the precursor of porous carbon;

[0045] Step 2, dry the precursor of porous carbon in a vacuum oven at 45 ° C for 5 h; put the dried precursor into a quartz boat, and pass an inert gas into a high-temperature tube furnace, such as N 2 After calcination and carbonization at 908°C for 5 hours, b...

Embodiment 2

[0055] A kind of preparation method of the porous carbon mixed carbon black rolling electrode material that the present invention is applied in the electric Fenton technology system comprises the following steps,

[0056] Step 1, with 125ml deionized water as solvent, Zn(NO 3 ) 2 ·6H 2 O and 2-methylimidazole are added, at this time Zn(NO 3 ) 2 ·6H 2 The concentration ratio of O and 2-methylimidazole is 74.4g / L:136.62g / L. After the compound reaction is complete by 300rpm magnetic stirring for 24h, use methanol as a cleaning agent at 9000rpm in a high-speed centrifuge to remove 2-methylimidazole The imidazole residues were completely removed, and centrifuged for 20 minutes to obtain the precursor of porous carbon;

[0057] Step 2, dry the porous carbon precursor at 50°C for 12 hours in a vacuum drying oven; put the dried precursor into a quartz boat, and pass an inert gas, such as N 2 After calcination and carbonization at 1100°C for 6 hours, black powder porous carbon wa...

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Abstract

The invention relates to a porous carbon mixed carbon black roller electrode material and a preparation method and application thereof. The method comprises the following steps: 1, uniformly ultrasonically dispersing porous carbon, carbon black, polytetrafluoroethylene and ethanol, and stirring until the porous carbon, carbon black, polytetrafluoroethylene and ethanol are viscous; uniformly ultrasonically dispersing the carbon black, polytetrafluoroethylene and ethanol, and stirring until the carbon black, polytetrafluoroethylene and ethanol are viscous; step 2, respectively rolling the materials to the upper surface and the lower surface of a metal mesh; and step 3, annealing the obtained material and cooling to room temperature to obtain the porous carbon mixed carbon black roll electrode material; the electrode material can improve H2O2 output and cathode usage times and effectively treats refractory organic wastewater. Compared with pure carbon black and pure porous carbon, the electrode material is beneficial to improving electrode stability and hydraulic erosion strength, and can prolong the service life of GDE electrodes in an electro-Fenton system. The electrode material has important significance for the use of the GDE electrodes in the electro-Fenton system, optimizing of the application effect of the GDE electrodes in organic wastewater treatment and promoting of electro-Fenton technology.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic electrode materials, in particular to a porous carbon mixed carbon black roll-pressed electrode material and its preparation method and application. Background technique [0002] The electro-Fenton process is one of the advanced oxidation technologies for effectively treating industrial organic wastewater. The advanced oxidation technology can be abbreviated as AOPs, which utilizes oxygen (O 2 ) is reduced to hydrogen peroxide (H 2 o 2 ), H 2 o 2 Catalyst ferrous ion Fe 2+ Catalytic decomposition forms strong oxidizing hydroxyl radical OH, thereby realizing the degradation of organic pollutants. Therefore, the electro-Fenton process is a modern, new, efficient and clean organic wastewater treatment technology. [0003] The air diffusion cathode (abbreviated as GDE), because of its good electrical conductivity and convenient aeration path, is used as a high-yield H in the electro-Fent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/467C02F101/30
CPCC02F1/46109C02F1/4672C02F2001/46133C02F2101/30
Inventor 余方可马宏瑞曹天轶
Owner SHAANXI UNIV OF SCI & TECH
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