Preparation method of ruthenium-iridium-titanium ternary metal mesh electrode containing nano tip structure

A nano-tip and ternary metal technology, which is applied in chemical instruments and methods, water/sludge/sewage treatment, water/sewage treatment, etc., can solve problems such as affecting electrode activity and limiting application scenarios, so as to improve utilization rate, The effect of simple preparation process and low production cost

Active Publication Date: 2021-11-30
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the shape of most coated titanium electrodes is plate-like, and the electrode form of this two-dimensional structure will affect the electrode activity to a certain extent, and will limit its application scenarios.

Method used

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  • Preparation method of ruthenium-iridium-titanium ternary metal mesh electrode containing nano tip structure
  • Preparation method of ruthenium-iridium-titanium ternary metal mesh electrode containing nano tip structure
  • Preparation method of ruthenium-iridium-titanium ternary metal mesh electrode containing nano tip structure

Examples

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Effect test

Embodiment 1

[0026] A method for preparing a ruthenium, iridium, and titanium ternary metal mesh electrode containing a nano-tip structure, the preparation steps of which are as follows:

[0027] (1) Pretreatment of the titanium screen substrate: put the titanium screen in a mixed acid solution containing hydrofluoric acid, nitric acid and high-purity water for 10 seconds to remove the oxide film on the surface, and then put the titanium screen in a mixed acid solution containing hydrofluoric acid, nitric acid and high-purity water The volume ratio is 1:4:5. Then, in a constant temperature water bath at 90° C., treat with 30% NaOH solution for 30 minutes to remove oil stains on the titanium substrate.

[0028] (2) Acid etching: Put the above-mentioned washed titanium mesh into an oxalic acid solution with a mass fraction of 10%, and etch it in a constant temperature water bath at 90°C for 1.5 hours. After the treatment, rinse the substrate with a large amount of water Oxalic acid and tita...

Embodiment 2

[0036] Comparing the performance of the ruthenium, iridium, titanium ternary metal mesh electrode with nano-tip structure and another ruthenium, iridium, titanium ternary metal mesh electrode for removing ammonium ions:

[0037] A preparation method of a ruthenium, iridium, titanium ternary metal mesh electrode containing a nano-tip structure, the preparation steps of which are the same as in Example 1; the preparation steps of another ruthenium, iridium, titanium ternary metal mesh electrode refer to the examples Steps 1, 2, 4, 5 in 1:

[0038] Use ruthenium, iridium and titanium ternary metal mesh electrodes as anodes to remove the ammonium ion concentration of 50mg / L wastewater (chloride ion concentration is 3g / L) prepared in the laboratory, and the working current is 300mA, in the flow-through electrochemical filter After 23 minutes of treatment, the concentration of ammonia nitrogen in the effluent was 23.5mg / L. Under the same conditions, the ruthenium, iridium and titan...

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Abstract

The invention belongs to the field of preparation of electrochemical electrodes, and discloses a preparation method of a ruthenium-iridium-titanium ternary metal mesh electrode containing a nano tip structure; the method comprises the following steps: (1), performing pretreatment of a titanium wire mesh substrate, including removal of a substrate oxide film and removal of oil stains; (2), performing acid etching; (3), forming a nano tip; (4), performing preparation, coating and thermal oxidation of middle-layer coating liquid; and (5), performing preparation, coating and thermal oxidation of an active layer coating solution. The surface of the prepared electrode channel contains a large number of nano tip structures, the effective reaction area of the electrode is increased, the collision opportunity of reactants and the surface of the electrode is increased, and mass transfer is promoted. The method is low in equipment requirement, low in production cost, simple to operate and easy to regulate and control. Meanwhile, the invention also discloses application of the ruthenium-iridium-titanium metal mesh electrode containing the nano-tip structure prepared by the invention to total nitrogen removal performance evaluation and control experiments in actual production wastewater, and high total nitrogen removal efficiency and low cost and energy consumption of wastewater treatment are realized.

Description

technical field [0001] The invention belongs to the field of electrochemical electrode preparation, and in particular relates to a preparation method of a metal mesh electrode containing a nano-tip structure. Background technique [0002] Coated titanium electrodes are generally called DSA and MMOA. It is a new type of high-efficiency and energy-saving electrode material that is based on metal titanium and coated with an electrocatalytic active coating of platinum group element oxides as the main component. [0003] The titanium base is the valve metal. It is conductive when used as a cathode in the process of electrolysis of brine, but it is non-conductive as an anode and has the property of unidirectional current carrying. Adding an intermediate layer between the substrate and the active layer is an important step in coating titanium electrodes. The oxide formed between the intermediate layer and the titanium substrate will inhibit the penetration and diffusion of oxygen ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461
CPCC02F1/46109C02F2001/46142C02F2001/46152
Inventor 于洪涛康文达
Owner DALIAN UNIV OF TECH
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