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Preparation method of high-overpotential electrode and solar energy and electric energy denitrification device comprising high-overpotential electrode

A technology of potential electrode and graphite electrode, which is applied in energy wastewater treatment, chemical instruments and methods, water pollutants, etc., and can solve the problems of lead oxide secondary pollution, not being an electrode material, and high energy consumption

Active Publication Date: 2014-12-10
苏州尼普环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electrode materials used in these devices and equipment have a low overpotential for oxygen evolution and hydrogen evolution, resulting in high energy consumption
Although the electrode surface covered with lead oxide can solve the problem of low overpotential, lead oxide is easy to cause secondary pollution, so it is not an ideal electrode material

Method used

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  • Preparation method of high-overpotential electrode and solar energy and electric energy denitrification device comprising high-overpotential electrode
  • Preparation method of high-overpotential electrode and solar energy and electric energy denitrification device comprising high-overpotential electrode

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preparation example Construction

[0018] The preparation of high overpotential electrode comprises the following steps:

[0019] Step 1) Add SnCl to the beaker 4、 SbCl 3 , add concentrated hydrochloric acid, n-butanol solution, stir to dissolve, then add Nd(NO 3 ) 3 , stir to dissolve;

[0020] Step 2) Put the graphite electrode into the beaker for soaking, take it out, and dry it at 50°C for half an hour;

[0021] Step 3) Then put it into a muffle furnace, crystallize at 420°C, take it out and cool it, and repeat the operation 12 times to obtain a neodymium-doped tin oxide graphite electrode.

[0022] Further, the soaking time in step 2 is set to 2 hours, and the crystallization time in step 3 is set to 2 hours.

[0023] The solar energy and electric energy denitrification device constructed by high overpotential electrodes includes a solar electrochemical denitrification device and an electrochemical oxidation denitrification device; the solar electrochemical denitrification device includes a solar cell...

Embodiment 1

[0025] Use neodymium-doped tin oxide graphite electrodes as anode and cathode respectively, put it into the first 100mL reaction tank 5, the electrode effective area is 6.8cm2, and the distance between the two electrodes is 3.5cm, and the solar electrolysis device is assembled as figure 1 shown. Take 100ml of a solution with an ammonia nitrogen concentration of 150mg / L, and add NaCl supporting electrolyte to make the concentration 0.1mol / L. Turn on the power supply, adjust the electrode voltage to 2.4 volts, conduct photolysis for 62 hours, and the ammonia nitrogen content is reduced to 6.0 mg / L as measured by Nessler's reagent method. This value is far lower than the national emission standard of 15mg / L.

Embodiment 2

[0027] Use neodymium-doped tin oxide graphite electrodes as the anode and the cathode respectively, put it into the second reaction tank 9 of 100mL, the effective area of ​​the electrode is 6.8cm2, and the distance between the two electrodes is 3.5cm, and the assembled electrochemical electrolysis device is as follows: figure 2 shown. Take 100ml of a solution with an ammonia nitrogen concentration of 100mg / L, and add NaCl supporting electrolyte to make the concentration 0.1mol / L. Turn on the power supply, adjust the electrode voltage to 2.4 volts, perform electrochemical electrolysis for 62 hours, and use Nessler's reagent method to measure the ammonia nitrogen content from 100mg / L to 9.0mg / L, reaching the national emission standard.

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Abstract

The invention discloses a preparation method of a high-overpotential electrode. The preparation method comprises the following steps: 1) adding SnCl4 and SbCl3 in a beaker, adding concentrated hydrochloric acid and an n-butyl alcohol solution, stirring to dissolve the SnCl4 and SbCl3, adding Nd(NO3)3, and stirring to dissolve the Nd(NO3)3; 2) soaking a graphite electrode in the beaker, taking out and drying the graphite electrode at 50 DEG C for half an hour; and 3) putting the graphite electrode in a muffle furnace, crystallizing the graphite electrode at 420 DEG C, taking out and cooling the graphite electrode, repeating the operation for 12 times to obtain a stannic oxide graphite electrode doped with neodymium. By adopting the preparation method, ammonia nitrogen in the sewage is directly and quickly oxidized to nitrogen, the efficiency is high, secondary pollution is avoided and the denitrification speed is stable. Solar energy is adopted as power drive of the method provided by the invention, thereby saving energy source.

Description

technical field [0001] The invention relates to a denitrification device, in particular to the preparation of a high overpotential electrode and a solar and electric energy denitrification device constructed thereof, which can denitrify by solar energy in sunny days and by electric energy in cloudy and rainy days. Background technique [0002] Excessive discharge of ammonia nitrogen (15mg / L) often causes eutrophication of water bodies, leading to fish poisoning, and even the outbreak of blue-green algae, which seriously affects people's production and life and threatens people's health. The current denitrification method is mainly nitrification-denitrification microbial denitrification method. The denitrification of this method is affected by many factors such as temperature, acidity, dissolved oxygen concentration, etc., the operation is not stable enough, and the action time is long; it also needs to add organic carbon, which increases the cost, and new residues may also a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/461C02F101/16
CPCY02W10/37
Inventor 刘守清刘晓宇
Owner 苏州尼普环境科技有限公司