Preparation method and application of three-dimensional ordered macroporous (3DOM)-Fe2O3/carbon aerogel (CA) electrode

A carbon aerogel, three-dimensional ordered technology, which is applied in the field of water treatment to achieve the effects of high electrical conductivity, enrichment of electrochemically active areas, and guaranteed degradation efficiency

Active Publication Date: 2015-04-22
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, we propose to use CA as the substrate to construct three-dimensional ordered macroporous Fe 2 o 3 novel cathode materials, and so far there are

Method used

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  • Preparation method and application of three-dimensional ordered macroporous (3DOM)-Fe2O3/carbon aerogel (CA) electrode
  • Preparation method and application of three-dimensional ordered macroporous (3DOM)-Fe2O3/carbon aerogel (CA) electrode

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Experimental program
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Embodiment 1

[0023] 3DOM-Fe 2 o 3 The preparation process of / CA electrode is as follows: figure 2 shown.

[0024] (1) Preparation of bulk CA electrode: Mix resorcinol, formaldehyde, sodium carbonate and water according to the molar ratio of 1:2:100:14.3, pour it into a glass mold, and then put it in a closed container, statically Place the reaction, take out the obtained phenolic resin airgel, and then carry out solvent replacement with an organic reagent with a surface tension less than 30mN / m, the time is 5-7 days, and replace acetone every 1-2 days; the obtained phenolic resin airgel The gel is placed at room temperature for drying. The drying time at room temperature is 5-7 days, and then the temperature is programmed to rise in a tube furnace. The temperature is raised to 800-950°C at a speed of 1.5-3.5°C / min and kept at this temperature for 3- 5h, then cooled to room temperature at the same rate to obtain block carbon aerogel;

[0025](2) Polystyrene hard template self-assembly...

Embodiment 2

[0029] Adopt the 3DOM-Fe that embodiment 1 prepares 2 o 3 / CA Electrode Degradation of Imidacloprid by Electrosorption. The degradation device is based on 3DOM-Fe 2 o 3 The / CA electrode is the cathode, and the BDD electrode is the anode. The voltage provided by the DC stabilized power supply is used to control the constant voltage to 0-0.1V. The process parameters are as follows: the water sample processing volume is 50~150 ml, and the electrode area can be 2~10 cm 2 , the electrode spacing was kept at 1-3 cm, and the working electrode potential was controlled at 0-0.1V. with 0.1M Na 2 SO 4 The 200mg / L imidacloprid of the electrolyte was used as the simulated pesticide wastewater. In the actual application process, the corresponding treatment time is controlled according to the nature of the treated wastewater, the amount of water and the electrode area, so as to meet the final treatment requirements. Utilize the 3DOM-Fe that the inventive method obtains 2 o 3 The / ...

Embodiment 3

[0031] Adopt the 3DOM-Fe that embodiment 1 prepares 2 o 3 / CA Electrode Fenton Degradation of Imidacloprid. The degradation device is based on 3DOM-Fe 2 o 3 The / CA electrode is the cathode, and the BDD electrode is the anode. The voltage provided by the DC stabilized power supply is used to control the constant current density to 5-15mA cm -2 . The process parameters are as follows: the water sample processing volume is 50~150 ml, and the electrode area can be 2~10 cm 2 , the electrode spacing was kept at 1-3 cm, and the working electrode potential was controlled at -10-5 V. with 0.1M Na 2 SO 4 The 200mg / L imidacloprid of the electrolyte was used as the simulated pesticide wastewater. In the actual application process, the corresponding treatment time is controlled according to the nature of the treated wastewater, the amount of water and the electrode area, so as to meet the final treatment requirements. Utilize the 3DOM-Fe that the inventive method obtains 2 o 3 ...

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Abstract

The invention relates to a preparation method and application of a three-dimensional ordered macroporous (3DOM)-Fe2O3/carbon aerogel (CA) electrode under a neutrality condition. On the surface of a CA electrode, 3DOM-Fe2O3 is deposited on the surface of the CA electrode according to the methods of vertical dipping, solvent evaporation and template calcination, so that the 3DOM-Fe2O3/CA electrode is obtained. The 3DOM-Fe2O3/CA electrode can be used for Electro-Fenton cathode rapid degrading of pollutants difficult to biodegrade in wastewater. Compared with the prior art, the preparation method and application of the 3DOM-Fe2O3/CA electrode have the advantages that CA high in specific area, electrical conductivity and adsorption capacity is selected as a substrate, meanwhile, the CA is loaded with the 3DOM-Fe2O3, solar absorbing photocatalytic performance is achieved, good Electro-Fenton catalytic activity is also achieved, Electro-Fenton and the photocatalysis technology are combined for use, and energy consumption is reduced while Electro-Fenton activity is improved. The method is easy and simple to implement and low in cost, is an efficient and energy-saving new technology, and has high economic and social benefits in the actual application aspect.

Description

technical field [0001] The invention belongs to the technical field of water treatment, in particular to a three-dimensional ordered macroporous Fe 2 o 3 / Carbon airgel electrode (3DOM-Fe 2 o 3 / CA electrode) and its application in photo-assisted electro-Fenton degradation of organic wastewater. Background technique [0002] In recent years, the focus on water pollution and protection has prompted the development of various treatment methods, and electro-Fenton (EF) oxidation technology is one of them. Since this method opens up a green route to electrochemically utilize air as a continuous oxygen supply, it has aroused widespread interest in the industry. Electro-Fenton oxidation is characterized by O 2 H is produced continuously at the cathode through two-electron reduction 2 o 2 , followed by in situ electrochemically generated H 2 o 2 Produce ·OH with Fenton catalyst, which is the main oxidizing species for decomposing pollutants, and it has a high standard elec...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/72C02F1/30C02F101/30
CPCY02W10/37C02F1/46109C02F1/30C02F1/4672C02F1/725C02F2001/46142C02F2101/30C02F2305/026C02F2305/10
Inventor 赵红颖彭求胜赵国华
Owner TONGJI UNIV
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