Nickel-boron-fluorine codoped lead dioxide positive pole and preparation method and application thereof

A technology of lead dioxide and co-doping, which is applied in chemical instruments and methods, oxidized water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of unsatisfactory electrode current efficiency and electrode service life, and chemical stability It needs to be further improved, the preparation process conditions are harsh, etc., to achieve the effect of improving electrode stability, stable mechanical properties, and simple preparation methods

Active Publication Date: 2018-04-13
河南省宗祥环保工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The electrocatalytic oxidation reaction occurs on the surface of the electrode. Therefore, the key to the electrocatalytic oxidation treatment of phenol wastewater lies in the performance of the electrode. The lead dioxide anode has the advantages of low cost, strong corrosion resistance, and high electrocatalytic oxidation activity. In the electrocatalytic oxidation technology However, because the current efficiency and service life of the electrode in the electrocatalytic oxidation process are not ideal, scholars have used various methods to modify the lead dioxide electrode.
Although the doping of rare earth metals such as Ce and La improves the catalytic performance of lead dioxide, the price is relatively expensive; the doping of Bi, Fe and Go, although the oxidation performance is improved, is greatly affected by pH, and the doping concentration It is also not easy to control, which will reduce the bonding force of the coating and greatly reduce the stability of the electrode
[0006] Lead dioxide has two different crystal structures, the outer layer β-PbO 2 The electrical conductivity is good, but the chemical stability needs to be further improved
According to literature reports, nickel-doped metal oxide anodes can generate ozone in the electrocatalytic anodization process, so they have high catalytic activity; current domestic and foreign studies have shown that boron-doped diamond (BDD) electrodes have high stability and high Catalytic activity, limited by the harsh conditions of its preparation process, it is difficult to promote industrialization

Method used

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  • Nickel-boron-fluorine codoped lead dioxide positive pole and preparation method and application thereof
  • Nickel-boron-fluorine codoped lead dioxide positive pole and preparation method and application thereof
  • Nickel-boron-fluorine codoped lead dioxide positive pole and preparation method and application thereof

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Effect test

Embodiment 1

[0053] A method for preparing a nickel-boron-fluorine co-doped lead dioxide anode, comprising the steps of:

[0054] (1) Put the porous titanium plate in hydrochloric acid solution (the volume ratio of concentrated hydrochloric acid and water is 1:2) and boil for 15min, then, ultrasonic cleaning with distilled water (ultrasonic power 35KHz) for 8min, to obtain the pretreated porous titanium plate; Citric acid, ethylene glycol, tin tetrachloride and antimony trichloride are mixed, heated and stirred to obtain a molten sol; wherein, the molar ratio of citric acid, ethylene glycol, tin tetrachloride and antimony trichloride is 650 :200:9:1;

[0055] (2) Coat the molten sol prepared in step (1) onto the pretreated porous titanium plate, dry at 140°C for 10 minutes, then calcinate at 550°C for 10 minutes, and cool to 30°C; repeat coating-drying-calcining- Cooling 5 times, and calcining again at 550°C for 1 hour to obtain the tin-antimony bottom layer;

[0056] (3) Place the tin-a...

Embodiment 2

[0061] A method for preparing a nickel-boron-fluorine co-doped lead dioxide anode, comprising the steps of:

[0062] (1) Boil the porous titanium plate in hydrochloric acid solution (the volume ratio of concentrated hydrochloric acid and water is 1:2) for 20 minutes, and ultrasonically clean it with distilled water (ultrasonic power 40KHz) for 10 minutes to obtain a pretreated porous titanium plate; , ethylene glycol, tin tetrachloride and antimony trichloride are mixed, heated and stirred to obtain a molten sol; wherein, the molar ratio of citric acid, ethylene glycol, tin tetrachloride and antimony trichloride is 700:100 :10:2;

[0063] (2) Coat the molten sol prepared in step (1) onto the pretreated porous titanium plate, dry at 130°C for 20min, then calcinate at 600°C for 20min, cool to 20°C, repeat coating-drying-calcining - Cooling 6 times, calcining again at 600°C for 1.5h to obtain the tin-antimony bottom layer;

[0064] (3) Place the tin-antimony bottom layer prepar...

Embodiment 3

[0068] A method for preparing a nickel-boron-fluorine co-doped lead dioxide anode, comprising the steps of:

[0069] (1) Boil the porous titanium plate in hydrochloric acid solution (the volume ratio of concentrated hydrochloric acid and water is 1:2) for 18 minutes, then ultrasonically clean it with distilled water (ultrasonic power 30KHz) for 5 minutes to obtain a pretreated porous titanium plate; Citric acid, ethylene glycol, tin tetrachloride and antimony trichloride are mixed, heated and stirred to obtain a molten sol; wherein, the molar ratio of citric acid, ethylene glycol, tin tetrachloride and antimony trichloride is 600 :150:8:1.5;

[0070] (2) Coat the molten sol prepared in step (1) onto the pretreated porous titanium plate, dry at 135°C for 15 minutes, then calcinate at 500°C for 15 minutes, and cool to 40°C; repeat coating-drying-calcining- Cooling 7 times, calcining at 500°C for 2 hours to obtain the tin-antimony bottom layer;

[0071] (3) Place the tin-antimo...

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Abstract

The invention belongs to the technical field of electrochemical water treatment and specifically relates to a nickel-boron-fluorine codoped lead dioxide positive pole and a preparation method and application thereof. The preparation method disclosed by the invention comprises the following steps: mixing citric acid, ethylene glycol, stannic chloride and antimony trichloride and heating and stirring to obtain fused sol; then coating a pretreated matrix, drying, calcining and cooling; repeatedly coating-drying-calcining-cooling for many times; finally calcining to obtain a tin-antimony bottom layer; putting the tin-antimony bottom layer in a lead oxide alkaline solution to perform electrolytic deposition to obtain an alpha-lead dioxide intermediate layer; putting the alpha-lead dioxide intermediate layer into a beta-lead dioxide deposition solution to perform electrolytic deposition to obtain the nickel-boron-fluorine codoped lead dioxide positive pole. As the nickel is added, catalysisof the pole is improved; as the boron and the fluorine are added, stability of the pole is improved; the fluorine is favorable for improving an oxidation rate of Pb<2+>. By means of nickel-boron-fluorine codoping, stability of the lead dioxide pole is effectively improved, catalytic activity of the pole is improved, and the pole can be applied to treating of waste water.

Description

technical field [0001] The invention belongs to the technical field of electrochemical water treatment, and specifically relates to a nickel-boron-fluorine co-doped lead dioxide anode and a preparation method and application thereof. Background technique [0002] Phenol is an important organic chemical raw material, which can be used to produce chemical products such as phenolic resin, pentachlorophenol, phenolphthalein, n-acetoethoxyaniline, etc. It has important uses in industries such as synthetic fibers, plastics, pesticides, dyes, paints, and oil refining . [0003] However, with the rapid development of industry and the increase of production capacity, serious phenol wastewater pollution has been brought about. It not only pollutes water sources, poisons fish in water bodies, but also inhibits the growth of microorganisms, destroys the ecological balance of water, and pollutes the environment; phenol wastewater flows into farmland, endangering the survival of crops, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/72C02F101/34
CPCC02F1/46109C02F1/4672C02F2001/46138C02F2101/345
Inventor 魏学锋苗娟张军杰张瑞昌万晓阳沈荣杰牛青山
Owner 河南省宗祥环保工程有限公司
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