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Nickel-titanium alloy hydrophobic lead dioxide electrode and preparation method thereof

A technology of lead dioxide and nickel-titanium alloy, which is applied in chemical instruments and methods, electrolytic coatings, water/sewage treatment, etc., can solve the problems of poor electrical conductivity and achieve the effect of enhancing electrocatalytic ability and changing electrical conductivity

Inactive Publication Date: 2020-12-29
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it can effectively improve the performance of the electrode such as oxygen evolution potential and enhanced life, it has a serious defect of poor conductivity.
At present, most of the research on electrode research and development focuses on the improvement of the catalytic layer and the intermediate layer, and there are few studies on the substrate and hydrophilicity. Therefore, the present invention proposes a nickel-titanium alloy hydrophobic lead dioxide electrode and its preparation method for the first time, improving the The conductivity of the substrate and the hydrophobicity of the catalytic layer on the electrode surface

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation method of nickel-titanium alloy hydrophobic lead dioxide electrode is as follows:

[0021] (1) Pretreatment of the alloy substrate: firstly, a nickel-titanium alloy substrate with a mass ratio of 20×20 mm and a mass ratio of 1:99 is obtained by wire cutting, and then polished with 150 mesh, 600 mesh, and 1000 mesh sandpaper until the surface is smooth, and the oxides on the surface; then use 5wt% NaOH solution to degrease the alloy matrix in a 90°C water bath for 2h; then use a 10wt% oxalic acid solution to acid etch the alloy matrix in a 98°C water bath for 3h; finally remove the matrix Ultrasonic cleaning with deionized water, sealed in 95% ethanol solution for later use;

[0022] (2) Preparation of nanotube array: adopt anodic oxidation method, with pretreatment electrode as working electrode, stainless steel electrode as counter electrode, with 98vol% ethylene glycol, 2vol% H 2 O, 0.5wt%NH 4 The F mixed solution is the electrolyte solution, anodize...

Embodiment 2

[0025] The preparation method of nickel-titanium alloy hydrophobic lead dioxide electrode is as follows:

[0026] (1) Pretreatment of the alloy substrate: firstly, a nickel-titanium alloy substrate with a mass ratio of 20×20 mm and a mass ratio of 1:98.5 is obtained by wire cutting, and polished with 150 mesh, 600 mesh, and 1000 mesh sandpaper until the surface is smooth, and the oxides on the surface; then use 5wt% NaOH solution to degrease the alloy matrix in a 90°C water bath for 2h; then use a 10wt% oxalic acid solution to acid etch the alloy matrix in a 98°C water bath for 3h; finally remove the matrix Ultrasonic cleaning with deionized water, sealed in 95% ethanol solution for later use;

[0027] (2) Preparation of nanotube arrays: using the anodic oxidation method, with the pretreated electrode as the working electrode and the stainless steel electrode as the counter electrode, with 96vol% ethylene glycol, 4vol% H2O, 1.5% wtNH 4 The mixed solution F is the electrolyte ...

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Abstract

The invention relates to the field of electrocatalytic electrode preparation, and particularly discloses a nickel-titanium alloy hydrophobic lead dioxide electrode which is composed of a lead dioxidesurface hydrophobic coating and a nickel-titanium alloy substrate with a nanotube structure. After the nickel-titanium alloy substrate is subjected to anodic oxidation, high-temperature annealing is carried out after a nickel-doped titanium dioxide nanotube array is formed on the surface of the substrate, then a lead dioxide surface hydrophobic coating is formed on the substrate through a direct-current electrodeposition method, and the lead dioxide surface hydrophobic coating is a lead dioxide hydrophobic catalytic layer. The invention further discloses a preparation method of the electrode.According to the electrode and the method, the conductivity of a titanium dioxide nanotube and the hydrophilicity of the catalytic layer are changed, therefore the impedance of the electrode is reduced, the utilization rate of OH is increased, meanwhile, the electrocatalytic capability of the electrode is enhanced, and energy consumption control and efficiency guarantee in large-scale production are benefited.

Description

technical field [0001] The invention relates to the field of electrocatalytic electrode preparation, and more specifically relates to a nickel-titanium alloy hydrophobic lead dioxide electrode and a preparation method thereof. Background technique [0002] Due to the rapid development of human society, a series of emerging refractory pollutants have caused many problems and posed a huge challenge to human health and ecosystems. A variety of advanced oxidation methods based on OH can effectively treat refractory pollution. Among them, the electrochemical oxidation method has a stronger oxidation ability than the general chemical oxidation method, and does not need to add other chemicals, so it has its unique advantages. Electrocatalytic oxidation mainly realizes the oxidation ability through the anode, so the development of new and efficient electrocatalytic electrodes has become a research hotspot. [0003] In comparison, PbO 2 Electrode oxygen evolution potential is high ...

Claims

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Application Information

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IPC IPC(8): C25D11/26C02F1/461C02F1/467
CPCC25D11/26C02F1/46109C02F1/4672C02F2001/46133
Inventor 臧国龙胡闯刘琦赵权
Owner TIANJIN UNIV