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Graphite felt-supported porous carbon-carbon cathode material as well as preparation method and application thereof

A cathode material, porous carbon technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve problems such as poor yield, limit electrode application, etc. Longer life and increased productivity

Inactive Publication Date: 2019-09-10
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the electro-Fenton technology system, the cathode material is considered to enhance the H 2 o 2 The most important factor for the yield and enhanced degradation effect, due to the graphite felt carbonaceous cathode H 2 o 2 Poor yield limits the application of this electrode in electro-Fenton systems

Method used

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  • Graphite felt-supported porous carbon-carbon cathode material as well as preparation method and application thereof
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  • Graphite felt-supported porous carbon-carbon cathode material as well as preparation method and application thereof

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preparation example Construction

[0032] A kind of preparation method of graphite felt supported porous carbon cathode carbonaceous material in the electric Fenton system of the present invention, comprises the following steps,

[0033] 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:(114.03g / L~159.64g / L). After the compounding reaction is complete by 200~500rpm magnetic stirring for 12~24h, use a high-speed centrifuge at 8000~ Use methanol as a cleaning agent at 10,000rpm to completely remove 2-methylimidazole residues, centrifuge for 8-20 minutes to obtain the precursor of porous carbon; dry the precursor of porous carbon in a vacuum drying oven at 45-65°C for 5- 12h; put the dried precursor into the quartz boat, and pass an inert gas into the high-temperature tube furnace, such as N 2 After calcination and carbonization at 908-1100°C fo...

Embodiment 1

[0037] A method for preparing porous carbon-loaded graphite felt cathode carbonaceous material in an electric Fenton system of the present invention comprises the following steps,

[0038] 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 2The concentration of O is 74.4g / L, and the concentration of 2-methylimidazole is 159.64g / L. After 24h of magnetic stirring at 250rpm, a high-speed centrifuge is used to centrifuge at 8000rpm using methanol as a cleaning agent for 20min to obtain the precursor of porous carbon. , dried in a vacuum oven at 50 °C for 5 h, put the obtained precursor into a quartz boat, and pass N into a high-temperature tube furnace 2 After calcination and carbonization at 1000°C for 5 hours, black powder porous carbon was obtained;

[0039] Step 2: Cut the commercialized graphite felt into 2cm×2cm size, add acetone and ultrasonically clean it for 30 minutes to remove oil, then ...

Embodiment 2

[0045] A method for preparing porous carbon-loaded graphite felt cathode carbonaceous material in an electric Fenton system of the present invention comprises the following steps,

[0046] Step 1, with 150ml 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 of O is 74.4g / L, and the concentration of 2-methylimidazole is 114.03g / L. After 500rpm magnetic stirring for 12h, use a high-speed centrifuge to centrifuge at 10000rpm using methanol as a cleaning agent for 8min to obtain the precursor of porous carbon. , dried in a vacuum oven at 65 °C for 7 h, put the obtained precursor into a quartz boat, and pass N into a high-temperature tube furnace 2 After calcination and carbonization at 908°C for 7 hours, black powder porous carbon was obtained;

[0047] Step 2: Cut the commercialized graphite felt into 2cm×2cm size, add acetone and ultrasonically clean it for 30 minutes to remove oil, then rinse ...

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Abstract

The invention discloses a graphite felt-supported porous carbon-carbon cathode material as well as a preparation method and application thereof. The preparation method comprises the following steps: 1, adding Zn(NO3)2*6H2O and 2-methylimidazole into ultrapure water or deionized water, carrying out a reaction, and carrying out centrifugal washing on the reaction product; 2, carrying out vacuum drying, and carrying out calcining carbonization in an inert gas so as to obtain porous carbon; 3, soaking the porous carbon and a graphite felt into the ultrapure water or deionized water, isopropanol and a polytetrafluoroethylene solution, and carrying out ultrasonic dispersion; and 4, carrying out drying at 40 DEG C or lower, carrying out annealing treatment for 1-2 hours at 300-400 DEG C, and carrying out cooling to the room temperature, so as to obtain the graphite felt-supported porous carbon-carbon cathode material. When being applied to an Electro-Fenton system, the carbon electrode material is capable of increasing the yield of H2O2, and when being applied to organic pollutant removal, the carbon electrode material is capable of increasing the decoloring rate of Rhodamine B; and the carbon electrode material has great significances for completion and optimization of the Electro-Fenton system and for application and popularization in organic wastewater treatment.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic electrode materials, in particular to a graphite felt-loaded porous carbon carbonaceous cathode material and a preparation method and application thereof. Background technique [0002] As a new, clean and efficient advanced oxidation technology (abbreviated as AOPs), electro-fenton technology utilizes oxygen (O 2 ) is reduced to hydrogen peroxide (H 2 o 2 ), and then by the ferrous ion Fe 2+ The catalytic reaction generates hydroxyl radicals (·OH) with strong oxidative properties, thereby realizing the degradation of pollutants. Graphite felt material as a cathode substrate not only has a three-dimensional structure, effective resistance to hydraulic shock and mechanical integrity, but also is cheap and easy to obtain. It has been commercialized and is considered to be one of the most widely used carbonaceous cathodes. [0003] In the electro-Fenton technology system, the cathode mate...

Claims

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Application Information

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