Preparation method of titanium dioxide nanotube-ruthenium-titanium oxide coating titanium electrode

A technology of ruthenium-titanium oxide and titanium dioxide, which is applied in the field of electrochemical electrode material preparation, can solve problems such as decreased coating binding force, decreased coating conductivity, and loss of precious metals, and achieves improved binding force, good strengthening life, and preparation conditions. mild effect

Inactive Publication Date: 2018-02-27
西安博岳环保科技有限公司
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Problems solved by technology

The above works are all from the perspective of improving the composition of the coating. The introduction of new metal elements can improve the performance of the electrode, but it may lead to an increase in cost.
From the point of view of the failure mechanism of titanium-coated electrodes, although the mechanism is complex and has not been fully studied yet, it is generally believed that the r

Method used

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  • Preparation method of titanium dioxide nanotube-ruthenium-titanium oxide coating titanium electrode
  • Preparation method of titanium dioxide nanotube-ruthenium-titanium oxide coating titanium electrode
  • Preparation method of titanium dioxide nanotube-ruthenium-titanium oxide coating titanium electrode

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preparation example Construction

[0037] The invention provides a method for preparing a titanium dioxide nanotube-ruthenium titanium oxide coated titanium electrode, comprising the following steps,

[0038] Step 1: Pretreatment of titanium substrate: after sandblasting the titanium sheet, sonicate it in acetone and ethanol for 15 minutes respectively; 3 / H 2 Chemical polishing in O solution, HF, HNO 3 and H 2 The volume ratio of O is 1:3:6 in turn, and the polishing time is 1min; the polished titanium sheet is cleaned with deionized water, dried with nitrogen, and stored in absolute ethanol for later use;

[0039] Step 2: TiO 2 Preparation of nanotube / Ti electrode: use the pretreated titanium sheet in step 1 (with an area of ​​2 cm 2 ) is the anode, and the large-area platinum mesh is the cathode, placed in 40mL electrolyte solution, the composition of the electrolyte solution is: NH 4 F, 0.75~1.25wt.%, preferably 1wt.%; H 2 O, 1 ~ 3vol.%, preferably 2vol.%; the balance is ethylene glycol; then apply 15...

Embodiment 1

[0041] Embodiment 1 (comparative example 1)

[0042] After the titanium sheet was sandblasted, it was ultrasonicated in acetone and ethanol for 15 minutes respectively; 3 / H 2 Chemical polishing in O solution, HF, HNO 3 and H 2 The volume ratio of O is 1:3:6 in turn, and the polishing time is 1min; the polished titanium sheet is cleaned with deionized water, dried with nitrogen, and stored in absolute ethanol for later use;

[0043] Use a pre-treated titanium sheet (with an area of ​​2cm 2 ) is the anode, and the large-area platinum mesh is the cathode, placed in 40mL electrolyte solution, the composition of the electrolyte solution is: NH 4 F, 0.5wt.%; H 2 O, 0.5vol.%; the balance is ethylene glycol; after that, a 10V DC constant voltage is applied to the two electrodes for anodic oxidation. During the anodic oxidation process, a constant temperature water bath is used to control the temperature of the electrolyte solution to maintain the temperature of the electrolyte s...

Embodiment 2

[0046] After the titanium sheet was sandblasted, it was ultrasonicated in acetone and ethanol for 15 minutes respectively; 3 / H 2 Chemical polishing in O solution, HF, HNO 3 and H 2 The volume ratio of O is 1:3:6 in turn, and the polishing time is 1min; the polished titanium sheet is cleaned with deionized water, dried with nitrogen, and stored in absolute ethanol for later use;

[0047] Use a pre-treated titanium sheet (with an area of ​​2cm 2 ) is the anode, and the large-area platinum mesh is the cathode, placed in 40mL electrolyte solution, the composition of the electrolyte solution is: NH 4 F, 0.75wt.%; H 2 O, 1vol.%; Surplus is ethylene glycol; Apply 15V DC constant voltage to carry out anodic oxidation afterwards on two electrodes, in the anodic oxidation process, adopt constant temperature water bath to control the temperature of electrolytic solution, keep the temperature of electrolytic solution as 25°C, use a magnetic stirrer to stir the electrolyte solution, ...

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Abstract

The invention discloses a preparation method of a titanium dioxide nanotube-ruthenium-titanium oxide coating titanium electrode. The preparation method comprises the following steps: carrying out pre-treatment on a titanium substrate, namely putting a pre-treated titanium sheet as a positive electrode and a large-area platinum mesh as a negative electrode into an electrolyte solution; then applying a direct current constant voltage to the two electrodes to anodize; in the anodizing process, keeping the temperature of the electrolyte solution constant and stirring the electrolyte solution; after anodizing, taking out the oxidized titanium sheet, namely a TiO2 nanotube/Ti electrode; ultrasonically cleaning with ethanol and water and annealing, and cooling to room temperature for later use; and coating the surface of the TiO2 nanotube/Ti electrode with coating liquid by means of a brush coating method, and drying, thermally oxidizing and cooling the TiO2 nanotube/Ti electrode to obtain the titanium dioxide nanotube-ruthenium-titanium oxide coating titanium electrode. According to the preparation method disclosed by the invention, the TiO2 nanotube can directly grow on a Ti substrate and has a very good bonding force with the titanium substrate, so that the TiO2.RuO2/TiO2 naotube/Ti electrode is longer in fortified life, and the electrochemical active area is large.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of electrochemical electrode materials, and in particular relates to a preparation method of a titanium dioxide nanotube-ruthenium titanium oxide coated titanium electrode. Background technique [0002] Nanostructured TiO is widely used in photocatalysis, dye-sensitized solar cells, sensors, and biomedicine due to its unique physical and chemical properties. Especially tubular nano-TiO 2 , because of its size controllable and highly ordered characteristics, it has a larger specific surface area, which can provide more active centers. Compared to other nano TiO 2 materials (such as nanoparticles), TiO 2 Nanotube materials will have better properties. Ruthenium is a precious metal with a small output in the world and a relatively expensive price. Ruthenium oxides such as RuO 2 The chlorine evolution overpotential and oxygen evolution overpotential are both low, making it one of the...

Claims

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Application Information

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IPC IPC(8): C25B11/08C25D11/26C23C28/04
CPCC23C28/042C25D11/26C25B11/051C25B11/057C25B11/093
Inventor 周偎偎
Owner 西安博岳环保科技有限公司
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