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a ti n o 2n-1 Preparation method and application of porous electrode

A tino2n-1, porous electrode technology, applied in the field of electrochemistry, can solve the problems of low electrolysis efficiency of metal oxide electrodes, long cycle life of electrodes, high requirements for reaction temperature, etc., and achieves simple preparation method and strong electrochemical stability , The effect of simplifying the reaction process

Active Publication Date: 2022-02-15
NAVAL UNIV OF ENG PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the electrochemical oxidation wastewater treatment, it is very important to select a suitable anode material. Currently used electrochemical oxidation electrodes such as SnO 2 Electrode, PbO 2 Electrodes, etc., but because most of the doping elements are highly toxic, it is easy to cause secondary pollution to the environment. At the same time, the electrolysis efficiency of general metal oxide electrodes is low and the service life is short
[0003] Ti n o 2n-1 The electrode has excellent physical and chemical properties, high acid and alkali corrosion resistance, about 1500S / cm, which is much higher than that of carbon electrodes, and the cycle life of this electrode is longer, but most of the Ti n o 2n-1 The electrode technology requires high reaction temperature, and the preparation process is complicated. At the same time, the obtained Ti n o 2n-1 Middle Ti 4 o 7 Phase content is low, generally 35% to 55%

Method used

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  • a ti <sub>n</sub> o <sub>2n-1</sub> Preparation method and application of porous electrode
  • a ti <sub>n</sub> o <sub>2n-1</sub> Preparation method and application of porous electrode
  • a ti <sub>n</sub> o <sub>2n-1</sub> Preparation method and application of porous electrode

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Embodiment 1

[0031] a Ti n O 2n-1 The preparation method of porous electrode, the method is:

[0032] S1. TiH with a mass ratio of 1:5 2 and TiO 2The raw material mixture is put into the ball mill, and the agate ball mixture composed of large agate balls with a diameter of 1cm and a diameter of 0.5cm in a mass ratio of 2:1 is added, and then ethanol is added, and the rotation speed is Ball milling for 24h under the condition of 240r / min to obtain a paste; the mass ratio of the agate ball mixture, raw material mixture and ethanol is 6:1:2;

[0033] S2, the paste obtained in S1 is treated for 24h under the condition that the temperature is 50°C, and then passed through a 100-mesh sieve to obtain a powder;

[0034] S3, put the powder obtained in S2 into a tube furnace for sintering to obtain Ti n O 2n-1 Powder; the sintering system is: first use a high vacuum system to control the degree of vacuum to 1×10 -3 hPa, then the temperature was raised from room temperature to 950 °C at a heat...

Embodiment 2

[0045] a Ti n O 2n-1 The preparation method of porous electrode, the method is:

[0046] S1. TiH with a mass ratio of 1:5 2 and TiO 2 The raw material mixture is put into the ball mill, and the agate ball mixture composed of large agate balls with a diameter of 1cm and a diameter of 0.5cm in a mass ratio of 2:1 is added, and then ethanol is added, and the rotation speed is Ball milling for 24h under the condition of 240r / min to obtain a paste; the mass ratio of the agate ball mixture, raw material mixture and ethanol is 6:1:2.5;

[0047] S2, the paste obtained in S1 is treated for 24h under the condition that the temperature is 50°C, and then passed through a 100-mesh sieve to obtain a powder;

[0048] S3, put the powder obtained in S2 into a tube furnace for sintering to obtain Ti n O 2n-1 Powder; the sintering system is: first use a high vacuum system to control the degree of vacuum to 1×10 -3 hPa, then the temperature was raised from room temperature to 950 °C at a h...

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Abstract

The present invention provides Ti n o 2n‑1 The preparation method of porous electrode, the method is: TiH 2 and TiO 2 After mixing ball milling, drying and sieving, after sintering, polyvinyl alcohol is added dropwise to obtain a precursor mixture, the precursor mixture is put on the nickel foam and pressurized to obtain a compact, and after sintering, wires are welded on the surface of the nickel foam. The outside of the wire is covered with a polyvinyl chloride tube, and the Ti is encapsulated with epoxy resin n o 2n‑1 The pre-finished product, after the epoxy resin is solidified, is polished and smoothed to obtain Ti n o 2n‑1 The porous electrode also provides applications for the electrochemical degradation of organic matter in organic wastewater. The present invention uses TiH 2 as TiO 2 The reducing agent, TiH 2 The temperature required for the reaction can be lowered, TiH 2 Decomposition produces Ti, H atoms directly participate in TiO 2 During reduction, the reaction process is simplified; Ti n o 2n‑1 The preform has porous structure, large specific surface area, high electrolysis rate, Ti 4 o 7 The content of the phase is high, so that the Ti n o 2n‑1 The porous electrode has high oxygen evolution potential and strong electrochemical stability. When it is applied to electrochemically degrade organic matter in organic wastewater, it has a high removal rate of organic matter, can be reused, and has a long service life.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a Ti n O 2n-1 Preparation method and application of porous electrode. Background technique [0002] Electrochemical oxidation treatment of organic wastewater has high efficiency and low energy consumption, and will not cause secondary pollution to the environment. It is a green water treatment technology with great development potential. In the treatment of electrochemical oxidation wastewater, it is very important to choose the appropriate anode material. Currently used electrochemical oxidation electrodes such as SnO 2 Electrodes, PbO 2 However, since most of the doping elements are highly toxic, it is easy to cause secondary pollution to the environment. At the same time, the electrolysis efficiency of general metal oxide electrodes is low and the service cycle is short. [0003] Ti n O 2n-1 The electrode has excellent physical and chemical propertie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/467C02F101/34
CPCC02F1/4672C02F2101/345
Inventor 李国明迟钧瀚李萌逸孟令岽陈珊
Owner NAVAL UNIV OF ENG PLA
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