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Carbon-aerogel-carried bimetal organic framework electro-Fenton cathode and preparation method thereof

A technology of organic framework and carbon airgel, which is applied in the field of water treatment to achieve the effects of rapid degradation, simple reaction operation and high specific surface area

Active Publication Date: 2015-12-02
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few reports on the combination of photocatalytic technology and electrocatalysis of MOFs.

Method used

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  • Carbon-aerogel-carried bimetal organic framework electro-Fenton cathode and preparation method thereof
  • Carbon-aerogel-carried bimetal organic framework electro-Fenton cathode and preparation method thereof
  • Carbon-aerogel-carried bimetal organic framework electro-Fenton cathode and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0034] Carbon aerogel-supported bimetallic organic framework electro-Fenton cathode, which uses carbon aerogel with excellent conductivity as the base electrode, MOF (Fe / Co) as electro-Fenton catalyst, and photocatalytic technology with low energy consumption Combined, the rapid and efficient removal of refractory organic pollutants can be achieved.

[0035] The specific preparation steps of MOF(Fe / Co) / CA electric Fenton cathode material in this embodiment are as follows:

[0036] (1) Mix resorcinol, formaldehyde, water and sodium carbonate according to the molar ratio of 1:2:17.5:0.0008, pour it into a glass mold, then put it in an airtight container, let it stand for reaction, and take out the obtained phenolic formaldehyde Resin airgel, and then replace the solvent with an organic reagent with a surface tension less than 30mN / m. The time is 5-7 days, and the acetone is replaced every 1-2 days; the obtained phenolic resin airgel is placed at room temperature for Drying, the...

Embodiment 2

[0040] The photoelectric Fenton Rhodamine B experiment of MOF(Fe / Co) / CA electrode was carried out in a cylindrical single circulation tank. During the experiment, the aeration (air) was continued and the circulating cooling water was turned on to maintain the temperature of the tank. The sunlight light source uses a 500W xenon lamp. Rhodamine B (20mg / L) and Na 2 SO 4 (0.1M) mixed solution 100mL as simulated wastewater. MOF(Fe / Co) / CA (working area fixed position 2cm 2 ) electrode as the cathode, BDD with the same working area as the anode, and the distance between the two electrodes was kept at 2cm; during the degradation experiment, the source of oxygen was constantly blown into air, and the air flow rate was 300mLmin -1 ;According to kinetic analysis, photo-assisted Fenton degradation of RhB reaction is a first-order reaction, and its reaction constant is 0.02min -1 , which is 5 times that of the electro-Fenton degradation reaction (0.004), such as figure 2 shown.

Embodiment 3

[0042] In order to evaluate the stability of the prepared MOF(Fe / Co) / CA electrode in actual water treatment, simulated wastewater (RhB aqueous solution) with different pH was prepared respectively, and then the photo-assisted electrolysis of MOF(Fe / Co) / CA electrode was carried out For Fenton Rhodamine B, the degradation experiment was carried out in a cylindrical single-type circulating water tank. During the experiment, aeration (air) was continued and circulating cooling water was turned on to maintain the temperature of the water tank. The sunlight light source uses a 500W xenon lamp. Rhodamine B (20mg / L) and Na 2 SO 4 (0.1M) mixed solution 100mL as simulated wastewater. MOF(Fe / Co) / CA (working area fixed position 2cm 2 ) electrode as the cathode, BDD with the same working area as the anode, and the distance between the two electrodes was kept at 2cm; during the degradation experiment, the source of oxygen was constantly blown into air, and the air flow rate was 300mLmin ...

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Abstract

The invention relates to a carbon-aerogel-carried bimetal organic framework electro-Fenton cathode and a preparation method thereof. The preparation method comprises the following steps: by using a block carbon aerogel as a substrate electrode, carrying out hydrothermal reaction to load a bimetal organic framework onto the substrate electrode, filtering, washing, and carrying out vacuum drying to obtain the carbon-aerogel-carried bimetal organic framework electro-Fenton cathode, wherein the bimetal organic framework is a Fe / Co bimetal organic framework. Compared with the prior art, by combining the photocatalytic technique and electro-Fenton, the carbon-aerogel-carried bimetal organic framework electro-Fenton cathode can degrade organic pollutants by using the higher-efficiency low-energy-consumption advanced oxidation technique, thereby providing a new way for using the electro-Fenton cathode in the photocatalytic / electro-Fenton combined technique for treating nondegradable organic pollutants. The carbon-aerogel-carried bimetal organic framework electro-Fenton cathode has the advantages of simple technical operation, energy saving and high efficiency, and has very wide application range in the field of actual water treatment.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to a carbon airgel-loaded bimetallic organic framework electric Fenton cathode and a preparation method thereof. Background technique [0002] Global water pollution and water quality deterioration have become a serious environmental problem facing mankind today. People's urgent need for clean water makes water treatment technology more and more widely concerned. At present, the methods used in water pollution control mainly include: physical method, chemical method and microbial method. Combining with others, it has been widely concerned and valued for its high-efficiency degradation ability, simplicity and convenience, and green products. The most notable feature of the advanced oxidation technology is that the hydroxyl radical (·OH) is the main oxidant, due to the high reactivity and non-selective degradation of the pollutants that are difficult to pass through biodegrada...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/46C02F1/30C02F1/72C02F101/30
CPCY02W10/37
Inventor 赵红颖彭求胜陈英赵国华
Owner TONGJI UNIV
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