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
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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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