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Copper-nickel loaded TiO2 nanotube array electrode for reducing nitrate nitrogen in water

A nanotube array and nitrate nitrogen technology, applied in the field of electrochemistry, can solve the problems of long processing time, high current density, high cost, etc., and achieve good reduction effect and low production cost

Active Publication Date: 2020-04-21
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are research reports that 90% of nitrate nitrogen can be removed by electrochemical technology, and there is no by-product ammonia nitrogen and nitrite nitrogen. However, the treatment time is relatively long and the current density used is relatively high. For industrial applications cost too high
It shows that the current technology of electrochemical reduction of nitrate needs to be improved urgently

Method used

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  • Copper-nickel loaded TiO2 nanotube array electrode for reducing nitrate nitrogen in water
  • Copper-nickel loaded TiO2 nanotube array electrode for reducing nitrate nitrogen in water
  • Copper-nickel loaded TiO2 nanotube array electrode for reducing nitrate nitrogen in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] First, use 180 and 320 mesh sandpaper to polish the TC4 titanium plate with a size of 5cm×2.5cm, then etch it in a boiled 20wt% sulfuric acid solution for 10min, and finally place it in acetone and methanol for 15min and soak it with deionized water. Cleaning completes the pretreatment. After the titanium plate is dried, a layer of TiO is grown on the surface of the titanium plate through anodization treatment. 2 nanotube. The electrolyte used is an ethylene glycol solution with a mass fraction of 0.25% ammonium fluoride, the applied voltage is 45V, and the treatment time is 5h; after the material is dried, it is placed in a muffle furnace for calcination at 450°C for 1h. After the material is cooled to room temperature, electrodeposition treatment is carried out. The electrolyte is composed of a solution containing boric acid, copper sulfate, and nickel sulfate. The molar ratio is boric acid: copper sulfate: nickel sulfate == 13: 1: 8, the applied potential is consta...

Embodiment 2

[0038] Copper-nickel-loaded TiO 2 The preparation method of the nanotube array electrode is the same as that of Example 1. Embodiment 2 current density is 10mA / cm 2 , other conditions are with embodiment 1.

Embodiment 3

[0040] Copper-nickel-loaded TiO 2The preparation method of the nanotube array electrode is the same as that of Example 1. Embodiment 3 current density is 30mA / cm 2 , other conditions are with embodiment 1.

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Abstract

The invention discloses a copper-nickel loaded TiO2 nanotube array electrode for reducing nitrate nitrogen in water. The electrode is prepared by taking titanium-based metal as a substrate, growing TiO2 nanotubes on the substrate, calcining for the first time, loading copper and nickel, calcining for the second time and reducing. The composite electrode is used as a cathode of a reaction device and can be used for electrochemical reduction of nitrate, and the nitrate nitrogen reduction rate is remarkably superior to that of commercial electrodes in the market.

Description

technical field [0001] The invention relates to a copper-nickel-loaded TiO used for reducing nitrate nitrogen in water 2 A nanotube array electrode and a preparation method thereof belong to the field of electrochemistry. Background technique [0002] At present, human industrial and agricultural production and other social activities have caused the nitrate concentration in groundwater and surface water to increase continuously, and the increase in nitrate concentration in drinking water will cause serious harm to human health. Therefore, the World Health Organization recommends that the concentration of nitrate in drinking water should be lower than 10mg / L. [0003] The pollution of nitrate nitrogen in water body comes from difficult-to-treat industrial wastewater and domestic sewage, excessive use of nitrogen fertilizer and deposition of polluted gases. This pollution can cause eutrophication of water bodies, blue baby syndrome in infants, and gastrointestinal cancer in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25D11/26C25D3/56C25B1/00
CPCC25D11/26C25D3/56C25B1/00C25B11/057C25B11/051C25B11/091
Inventor 李爱民杨坤宋海欧鲁昶周庆双陈冬李文涛李大伟
Owner NANJING UNIV
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