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Preparation and application of porous titanium-based titanium black nanotube lead dioxide electrode

A titanium dioxide and lead dioxide technology, which is applied in the fields of oxidized water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of easy detachment of the catalytic layer, low service life, poor conductivity, etc. , to achieve the effect of improving catalytic performance, enhancing bonding force and reducing internal resistance

Active Publication Date: 2021-01-22
NANJING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the problems of poor conductivity, poor stability, low service life and easy falling off of the catalytic layer of traditional lead dioxide electrodes, the present invention provides a porous titanium-based titania nanotube lead dioxide electrode with high conductivity (1000S / cm) Titanium oxide (Ti 4 o 7 ) nanotubes as the intermediate layer, with Ti 4 o 7 Lead dioxide with a similar crystal structure is used as the outer coating layer, and an electrode with excellent conductivity, catalytic performance and stability is prepared;

Method used

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  • Preparation and application of porous titanium-based titanium black nanotube lead dioxide electrode
  • Preparation and application of porous titanium-based titanium black nanotube lead dioxide electrode
  • Preparation and application of porous titanium-based titanium black nanotube lead dioxide electrode

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Embodiment 1

[0047]The preparation method of the porous titanium-based titania nanotube lead dioxide electrode in this embodiment includes the following steps:

[0048](1) Use the cleaned porous titanium plate as the substrate for anodizing treatment to produce TiO on the surface of the substrate2nanotube;

[0049]Titanium plate cleaning, put the titanium electrode sheet with a filtration accuracy of 20μm into a 200mL beaker, and pour the isopropanol solution to submerge the titanium electrode sheet, and then ultrasonically clean for 15 minutes. After ultrasonic cleaning, rinse the titanium with ultrapure water twice The electrode pads are placed in an oven at 100°C and dried for 15 minutes. Finally, the above steps are repeated with ethanol and NaOH solution;

[0050]Titanium dioxide nanotubes are prepared by preparing a mixed solution with a mass ratio of ethylene glycol and ultrapure water of 4, then adding 0.5% ammonium fluoride, and then using porous titanium as the anode, stainless steel as the cat...

Embodiment 2

[0060]The preparation method of the porous titanium-based titania nanotube lead dioxide electrode in this embodiment includes the following steps:

[0061](1) Use the cleaned porous titanium plate as the substrate for anodizing treatment to produce TiO on the surface of the substrate2nanotube;

[0062]Titanium plate cleaning, put the titanium electrode sheet with a filtration accuracy of 20μm into a 200mL beaker, and pour the isopropanol solution to submerge the titanium electrode sheet, and then ultrasonically clean for 15 minutes. After ultrasonic cleaning, rinse the titanium with ultrapure water twice The electrode pads are placed in an oven at 100°C and dried for 15 minutes. Finally, the above steps are repeated with ethanol and NaOH solution;

[0063]Titanium dioxide nanotubes were prepared by preparing a mixed solution with a mass ratio of ethylene glycol and ultrapure water of 6, and then adding 0.5% ammonium fluoride, and then using porous titanium as the anode, stainless steel as th...

Embodiment 3

[0102]The preparation method of the porous titanium-based titania nanotube lead dioxide electrode in this embodiment includes the following steps:

[0103](1) Use the cleaned porous titanium plate as the substrate for anodizing treatment to produce TiO on the surface of the substrate2nanotube;

[0104]Titanium plate cleaning, put a 20μm titanium electrode sheet into a 200mL beaker, and pour isopropanol solution to submerge the titanium electrode sheet, then ultrasonically clean for 15 minutes, and then rinse the titanium electrode with ultrapure water twice after ultrasonic cleaning The slices were placed in an oven at 100°C and dried for 15 minutes. Finally, the above steps were repeated with ethanol and NaOH solution;

[0105]Titanium dioxide nanotubes are prepared by preparing a mixed solution with a mass ratio of ethylene glycol and ultrapure water of 5, then adding 0.5% ammonium fluoride, and then using porous titanium as the anode, stainless steel as the cathode, at room temperature, a...

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Abstract

The invention discloses preparation and an application of a porous titanium-based titanium black nanotube lead dioxide electrode, which belong to the field of material preparation. The electrode takesporous titanium as a matrix, titanium black nanotubes are arranged on the surface of the matrix and the surfaces of pore walls of the matrix to serve as middle layers of the electrode, and PbO2 layers are coated on tube cavities and the surfaces of the titanium black nanotubes; meanwhile, the preparation method of the electrode is simple, a porous titanium plate is used as the matrix, titanium black nanotubes are formed on the surface of the matrix and the surfaces of pore walls by adopting an anodic oxidation-annealing-high-temperature gas-phase reduction method to serve as an intermediate layer of the electrode, and then the lead dioxide layer is loaded in a suction filtration penetration type electrodeposition mode to prepare the corresponding electrode; and the prepared electrode canbe applied to degradation of pollutants in a water body.

Description

Technical field[0001]The invention belongs to the field of inorganic nano material synthesis, and more specifically, relates to the preparation and application of a porous titanium-based titania nanotube lead dioxide electrode.Background technique[0002]As a kind of advanced oxidation technology, electrochemical oxidation technology is favored by many scholars because of its environmental friendliness, rapid reaction, simple equipment, no need to add additional reagents and easy automation.[0003]The electrochemical oxidation method relies on the hydroxyl radicals (·OH) generated by the reaction to achieve the degradation and mineralization of organic pollutants. The standard potential of ·OH is extremely high (E0= 2.80V), which can oxidize most organic matter. Lead dioxide electrode, especially β-PbO2The electrode has low preparation cost and good conductivity. In addition, the lead dioxide electrode has a high oxygen evolution potential (1.8-2.0eV), so it has attracted wide attentio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/72
CPCC02F1/46109C02F1/4672C02F2001/46142
Inventor 韩卫清裴博文张永昊朱洪威黄芳
Owner NANJING UNIV OF SCI & TECH
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