Anode and cathode synchronous electrochemical method for removing gaseous pollutants and its device
An electrochemical and pollutant technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of poor organic pollutant removal, unsuitable water solubility, low pollutant removal efficiency, etc., and achieve the removal rate. Improve, good stability, efficient catalytic decomposition effect
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Embodiment 1
[0053] (1) Preparation of cathode: In a 100mL beaker, put 0.054g graphene oxide, 40mL deionized water, 0.270gFeCl 3 ·6H 2 O, after ultrasonic dispersion, add 0.528g of ascorbic acid and stir to dissolve, then add 10mL of hydrazine and stir for a few minutes to end. The above dispersion was transferred to a 100mL hydrothermal kettle, reacted at 180°C for 8h, and cooled naturally. The precipitate was separated by centrifugation and washed with deionized and absolute ethanol to obtain an iron-containing catalyst. Ultrasonic disperse 10 mg of the iron-containing catalyst prepared above into 5 mL of the mixed solution of perfluorosulfonic acid-polytetrafluoroethylene copolymer and isopropanol, and then spray the dispersion on the surface of a carbon cloth electrode of 16 square centimeters to prepare Get the cathode.
[0054] (2) Preparation of the anode: Soak the carbon cloth in a solution containing 3.0mol L -1 Citric acid, 0.2mol·L -1 Tin tetrachloride pentahydrate and 0.03...
Embodiment 2
[0059] Using the same electrochemical reactor as in Example 1, gaseous pollutants containing water vapor and oxygen are introduced into the cathode and anode gas flow passages respectively, and the flow rate of the gas is 20mL min -1 , the gas humidity is 50%, the oxygen content in the gas is 20V%, the concentration of gaseous pollutants is 10ppm, the gaseous pollutants are toluene, acetone, n-hexane and cyclohexanone respectively, and a DC voltage of 2.5 volts is applied between the cathode and the anode , the temperature of the reaction process is controlled to be 20°C. The concentration of pollutants at the gas outlet was detected by gas chromatography when the reaction was stable, and the catalytic performance was shown in Table 1.
[0060] It can be seen from Table 1 that the device for removing gaseous pollutants of the present invention can realize the synchronous removal effect of the anode and the cathode on different gaseous pollutants, and the removal effect of the ...
Embodiment 3
[0064] (1) Preparation of the cathode: Soak the carbon cloth in 0.1mol / L ferrous nitrate solution for 24 hours, take it out and dry it under vacuum at 50°C. Then put it into a tube furnace and treat it at a high temperature of 500 degrees under the condition of Ar gas, and then the cathode material can be obtained.
[0065] (2) Preparation of anode: ultrasonically disperse 0.2 g of carbon nanotubes in a methanol solution containing 10 mmol / L titanium acetylacetonate, take it out after 2 hours, dry the dispersion at 50 degrees under vacuum, and then put it into a tube furnace The anode material is obtained by treating at a high temperature of 900 degrees under the condition of Ar gas.
[0066] (3) Assembly of the electrochemical reactor: clamp the cathode prepared in step (1), the anode prepared in step (2) and the proton exchange membrane (such as Nafion 115), the surface of the anode is provided with an anode gas flow channel, and the surface of the cathode is provided with ...
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